BMW M4 VS Porsche 911
- Adaptive suspension
- Ripping dual-clutch auto
- No AEB
- Awkward access to tight rear seats
- So-so warranty
- Tight in the rear
- Bit thirsty
- No manual (yet)
When it comes to cars, the letters B, M, and W carry huge credibility. But the extra letters and numbers that follow make all the difference.
A second M for example, means the hot rodders in the Munich maker's performance and racing skunkworks have played with everything from the drivetrain, aero and suspension, to the rims, rubber and interior design.
The number sitting next to it then determines whether you're looking at a compact firecracker (M2), fast-lane monster (M5), or bruising family truckster (X6 M). But every now and then some additional letters find their way onto even a BMW M car's bootlid.
In this case, a C and an S are significant additions to the already impressive M4 badge. They stand for Coupe Sport and were famously applied to BMW's achingly beautiful (E9) coupes of the late 1960s and early '70s.
So, with the howling echo of that all-time classic's in-line six ringing in its ears, the new M4 CS stands up as a proper high-performance coupe, pitched against the likes of Audi's recently reborn RS 5, the Lexus RC F, and Merc-AMG's soon-to-arrive C 63 S Coupe.
Does the CS legend live? Read on to find out.
|Engine Type||3.0L turbo|
|Fuel Type||Premium Unleaded Petrol|
The big three automotive icons - VW’s Beetle, the original Mini, and… the Porsche 911.
In continuous production for more than 50 years, a new, eighth-generation ‘992’ version of one of the world’s most recognisable cars has arrived in Australia.
Launching initially in rear-wheel drive Carrera S (CS) and all-wheel drive Carrera 4S (C4S) variants, the headline technical upgrades are more power with lower emissions, all alloy body panels (apart from the front and rear aprons), a new eight-speed ‘PDK’ dual-clutch transmission, a ‘Wet Mode’ driving program that supports the driver in the rain, and availability of ‘Night Vision’ using an intelligent thermal imaging camera.
But there’s so much more to the story.
|Engine Type||3.0L turbo|
|Fuel Type||Premium Unleaded Petrol|
The BMW M4 CS is every bit as fast and engaging as you'd expect it to be. But be prepared for the day-to-day compromises that go with its pared back interior layout. It's beautifully engineered and dynamically excellent, but will have its hands full when Merc-AMG's similarly sized and priced (updated) C 63 S Coupe arrives shortly to rattle its cage.
Is the BMW M4 CS your kind of four-seat sledgehammer? Tell us what you think in the comments section below.
BMW offers the 'Service Inclusive' program, a one-off advance payment to cover scheduled costs at the 'Basic' or 'Plus' level.
In designing a modern sports car, who’d hang the engine over the back wheels? This layout just shouldn’t work in the way it does, but Porsche has continued to evolve and hone the 911 to an incredibly fine point. It’s a simply superb sports car experience.
If it were our money, we'd go for the Carrera S coupe. Entry-price dollars with minimal penalty in terms of dynamics relative to the C4S.
Porsche 911 or Merc-AMG GT? Tell us what you think in the comments section below.
Note: CarsGuide attended this event as a guest of the manufacturer, with travel and meals provided.
The M4 in either entry-level Pure, or next-step-up Competition spec already looks like John Cena in a 10-year-old's t-shirt, with muscular bumps, curves and cuts extending aggressively in all directions. From its bulbous 'power dome' bonnet, to the pumped-up guards and gaping vents, the M4 screams 'don't argue'.
But this CS version borrows heavily from the track-focused M4 GTS (phased out earlier this year) and dials the aggro up a few notches.
A Matterhorn-sized bulge in the centre of the lightweight CFRP (Carbon-Fibre Reinforced Plastic) bonnet descends towards a broad air extraction vent that could double as a stormwater drain in bad weather.
The front, exposed carbon splitter is a slightly less accentuated version of the GTS's race-ready set-up, and the signature kidney grille is finished in menacing gloss black.
That black finish, part of the standard BMW Individual 'Shadow Line' package, also extends to the side-window trim, window recess covers, and vents on the front wings.
CFRP (unpainted this time) reappears on the roof, and an exposed carbon Gurney flap-style spoiler adds a touch of flash and aero efficiency to the bootlid. A nice match for the carbon diffuser below.
Suitably wide black alloy rims (19-inch front, 20-inch rear) further enhance the intimidating look, with twin LED headlights and an 'Organic rear lighting system', the latter another lift from the GTS, delivering an impressively vivid display.
The interior is familiar BMW territory, but it does feel like you've had a nasty break-up and your significant other has filled the moving van with all the luxury bits.
The leather and Alcantara trimmed sports seats are classy and racy enough, but the door cards are made from a natural-fibre composite BMW calls 'Nawaro'. There are no storage pockets, and you get a webbing strap to help pull the door closed.
Super lo-fi, and bafflingly, the 'armrest' slopes downward at an angle that, despite an Alcantara-trimmed pad, makes it just about impossible to actually rest your arm on it. Perhaps it adds some wheel-twirling elbow room, but for the other 99 per cent of the time it's just annoying.
Although trimmed in contrast-stitched Alcantara, the centre console is also a rudimentary affair, with no storage box between the front seats or adjustable air vents for rear-seat passengers. It might be good for weight saving, but it's not so great in terms of day-to-day practicality (which we'll get to shortly).
There's more Alcantara on the M Sport steering wheel (a leather wheel is a no-cost option) and dash-panel insert, with the CS designation neatly called out in mosaic-style lettering near the centre stack.
In designing a new 911 you’re effectively carrying the Porsche brand on your shoulders, and Porsche design chief Michael Mauer and his team have created a look that’s contemporary, yet unmistakably 911. Quality and attention to detail permeate every millimetre of this car.
The profile, though substantially larger, mirrors that of the 1963 ‘901’ original, with the car’s rear-engine layout a key driver in terms of stance and overall proportion.
Read More:The latest 911 Carrera Coupe review.
First, the front and rear axles have been lengthened (45mm fr - 44mm rr) without any change to the wheelbase, so the car looks broader than ever before.
And for the time being, there’s no such thing as a ‘wide body’. In previous generations of the 911 successive iterations (AWD C4S, Turbo and GT versions) have offered wider bodies, particularly at the rear. But the CS is as wide at the haunches as the C4S.
One of the key external changes is a single LED light bar across the back of the car; a design signature across all current Porsche models. And I for one, love the old school typefaces used for the brand and model badgework.
Another shift is the move to staggered rims on the mainstream Carrera models, with 20-inch alloys up front and 21s at the rear, while the pop-up rear spoiler is a new design incorporating a large slice of the rear decklid and able to raise all the way to a full air-brake position.
The drag coefficient is a very respectable 0.29, and car-spotters will be pleased to know the RWD CS sports black louvers in the rear grille, while the AWD C4S swaps that out for chrome finish.
At the front, a recessed channel at the top of the bonnet (front boot lid) is a tip of the hat to early 911 generations, the headlights look the same as the out-going model but they’re LED (four types offered), and electric pop-out door handles are flush fit.
Inside, the dash design will be immediately familiar to early 911 owners. Parallel horizontal lines define its upper and lower edges, with a sleek 10.9-inch multimedia screen neatly integrated in the centre, and five toggle style-buttons underneath facilitating the switch between key functions.
The instrument display allows for a classic 911 five dial arrangement, or multiple other layouts to be configured across two 7.0-inch “freeform” screens sitting either side of a fixed analogue tachometer in the centre. It’s beautifully executed.
The steering wheel is new, with a drive mode dial sprouting from the four o’clock position on ‘Sport Chrono’ equipped cars, and marginally lighter redesigned seats trimmed in partial leather look as good as they feel (especially with the standard houndstooth-style cloth inserts).
When it comes to cars, practicality is a subjective area. The M4 CS offers plenty of space for the driver and front-seat passenger, with room for two more in the back, as well as a decent boot. Practical, right?
But day-to-day details make all the difference and the drive to simplify the CS's cabin and reduce the car's overall weight has seen many common interior-storage options deleted.
The price CS owners pay for racy minimalism is a complete absence of door bins, no lidded box between the front seats, and no oddments tray in the middle of the centre console. Just a pair of cupholders ahead of the gearshift, and a shallow tray beyond that.
If you and a friend get into the car each carrying a standard load of personal junk like a phone, keys, wallet, and a beverage of some description, capacity is immediately exceeded.
Yes, you can shove all that 'stuff' into the (medium-sized) glove box, and that's probably the safer option anyway. But it's not as convenient as slipping things into strategically placed bins and boxes.
In terms of charging/connectivity there's a 12-volt outlet between the cupholders, and a single USB port oddly placed towards the rear of the centre console.
And while there are two seats in the back, getting to them requires the flexibility of a side-show contortionist, and the patience of a Tesla Model 3 reservation holder (the electric system that slides the front seat forward is glacially slow).
Even once you've managed to thread the needle through to the back, headroom is tight, so it's fine for kids and an occasional-only option for grown-ups. There are no cupholders or even a fold-down centre armrest back there, but there is a small, open oddments tray between the seats.
A cargo net is standard, there are four tie-down anchors, a small netted storage section behind the passenger side wheel tub, a cubby on the opposite side, shopping-bag hooks and conveniently placed handles, which release the 60/40 split-folding rear seat backs to liberate more room.
Don't bother looking for a spare wheel of any description. A repair/inflator kit is your only option.
So, there’s practicality, and then there’s sports car practicality. The latter balances all the smile-inducing dynamic ability you’d expect, with space for luggage and the stuff of everyday life, on a sliding scale from pathetic to liveable.
The 911’s needle is bouncing up against the liveable end of the dial because it’s actually a four-seater, with more than toothbrush and undies cargo capacity.
Yes, it’s a ‘2+2’ with the back seats best for kids or very occasional and short-term adult accommodation. But talk to a 911 owner and despite the limited rear legroom they’ll tell you about dropping the kids off at pre-school, or that time they had to take friends home after a party. Those extra spots are incredibly handy.
As well as that, the rear backrests flip forward to create a broad storage platform, supplementing the 132-litre (front) boot.
Generous boot dimensions mean it’s big enough to swallow a weekend-for-two’s worth of soft bags, or even small hard suitcases, not to mention a modest grocery shop if the need arises.
In the cabin, increased interior dimensions mean front seat occupants are provided with 12mm of extra headroom despite the car growing only 4.0mm taller overall. Part of that trick is the front seats being mounted 5.0mm lower and the cushions being slightly thinner. There’s heaps of room.
Day-to-day stuff includes a fixed cupholder at the bottom of the centre console, and a pop-out device at the end of the dash on the passenger side. Door pockets are slim, but they’re there, and will accept small water bottles laid on their side.
A medium-size glove box is a welcome addition, as are multiple connectivity/power options including two USB ports in a small console storage box, and a 12-volt outlet in the passenger footwell. There are also clothes hooks on the front seat backrests and on the B-pillars.
Price and features
In a classic less-is-more (money) scenario, the $189,529 BMW M4 CS cops a decent serving of standard features, but misses out on some of the luxury trimmings included on the next-rung-down M4 Competition ($156,710).
Standard inclusions run to adaptive LED headlights (including 'BMW Selective Beam' anti-dazzle tech), adaptive M suspension, combination 'Merino' leather/Alcantara seat trim, Alcantara-wrapped 'M' sports steering wheel (with blue/red stitching), a configurable head-up display, a 'BMW Individual' Anthracite roofliner, 'Comfort Access' (keyless entry and start), plus the 'iDrive6' multimedia system (managed via controller, touch or voice) running through an 8.8-inch, high-definition screen.
There are also big 10-spoke forged alloy rims, front-seat heating, sat nav, automatic headlights, rain-sensing wipers, front and rear park distance control, 'Surround View' parking assist, and the 'BMW ConnectedDrive' suite ('BMW Connected+' smartphone app, real-time traffic info, concierge services, and more).
That's a heavyweight equipment list for a car that's all about lightness. Inside, besides the basic door and centre console arrangement, the other significant concessions to kilo stripping are a 'specially adapted' 12-speaker version of Harman/Kardon's 'Surround Sound' audio system with DAB+ digital radio (16-speaker in the Competition), and a simplified, single-zone climate control set-up (dual-zone in the Competition).
Kind of like the CEO wearing a Swatch watch; they're wealthy and powerful, but 'all about performance', so they wear a functional, conspicuously un-flashy timepiece. They still live in a $10m penthouse apartment, though.
The new 911 is offered initially in rear-wheel drive Carrera S, and all-wheel drive Carrera 4S versions with a new eight-speed ‘PDK’ dual-clutch transmission only. Pricing for soft top cabriolet variants has been set with arrival timing to be confirmed.
Base ‘non S’ Carrera models, and the option of a seven-speed manual gearbox an all models will be available later in 2019.
Launch pricing, before on-road costs, ranges from an rrp of $265,000 for the Carrera S Coupe, through $286,500 for the Carrera S Cabriolet, on to $281,800 for the Carrera 4S Coupe, right up to $302,600 for the Carrera 4S Cabriolet. So, very much the premium sports car experience, then.
And despite the rarefied air the 911 flies in there’s some serious competition in the same space, although they all circulate at a slightly higher financial altitude.
In ascending order the key competitive set includes, the BMW M6 ($292,600), Jaguar F-Type V8 SVR AWD ($295,578), Nissan GT-R Nismo ($299,000), Merc-AMG GT S ($301,129), McLaren 540C ($325,000), and if you’re willing to cough up a few extra bucks a month, the entry-level Audi R8 ($367,000).
And aside from the new 911’s comprehensive safety and performance packages, which we’ll cover in later sections, the standard features list is an impressive roll-call.
It kicks off with partial leather trim, complete with chequered flag style cloth inserts, over heated 14-way electrically-adjustable sports seats (with memory package), a leather-trimmed sports steering wheel, dual-zone climate control air conditioning, ‘Porsche Communication Management’ (audio, navigation, communication and assistance systems), 12-speaker Bose Surround Sound-audio (including digital radio), Apple CarPlay (no Android Auto), keyless entry and start, rain-sensing wipers, LED auto headlights, the characteristic ‘4-point’ LED daytime running lights plus LED tail-lights, the ‘Carrera S’ alloy wheels, active cruise control, the 10.9-inch multimedia screen, and twin 7.0-inch digital instrument screens.
The options list is also long. For example, ‘Night Vision Assist’ using an intelligent thermal imaging camera to bring the darkness to light is a $4900 extra, and a Burmester ‘High-End Surround Sound System’ will set you back $6700.
Available standard colours are white, black, red and yellow, with optional metallics covering white, black, grey, mid-blue, dark-blue, dark-grey, silver and a deep green. ‘Special’ optional colours include a full-bodied red, and soft grey, as well as ‘70s-inspired orange, close to aqua blue and lime green. And I’m sure if you really wanted it, Porsche would finish your 911 in pink, brown, or gold.
Engine & trans
Like its E9 coupe forbear, the M4 CS is powered by an in-line six-cylinder engine, but things have moved on over the last 50 years, and the current (S55) engine offers a mechanical case study in the marriage of high-performance and efficiency.
The all-alloy unit features direct injection and twin turbos, the key drivers behind a stonking 600Nm of maximum torque (50kW up on the M4 Competition), available from 4000-5380rpm, and peak power of 338kW (+7kW), arriving at 6250 rpm.
It also features a 'charge air' (air-to-air) intercooler, 'Double Vanos' variable cam timing, and 'Valvetronic' variable valve lift (inlet and exhaust side).
The sleeveless cylinders use 'Electric Arc Wire Spray' technology to form a thin coating of iron on the cylinder walls, to save weight (no cast-iron liners) and reduce manufacturing complexity. And the engine's closed-deck design increases the block's torsional rigidity, enabling a substantial 10.2:1 compression ratio and use of a lightweight, forged crankshaft.
Transmission is a seven-speed 'M Double-Clutch' (M DCT) dual-clutch auto, complete with dedicated oil cooler, and drive is distributed across the rear axle via an electronically controlled, multi-plate 'Active M Differential'.
The 911’s rear-mounted, all-alloy 3.0-litre, twin-turbo flat six-cylinder engine now features high-pressure piezo injectors and bigger turbos for more power (+22kW) and torque (+30Nm), with outputs reading 331kW (444 horsepower) at 6500rpm and 530Nm from 2300-5000rpm.
Not only are the turbos bigger, they’re now mirrored and rotate in opposite directions, where they were previously identical and spinning the same way. It’s all about balance and evening out charge pressure.
The turbo wastegate valves are now operated by electric stepper motors rather than vacuum for faster pressure control, with maximum boost set at 1.2bar.
Porsche’s ‘VarioCam Plus’ variable valve timing and lift system, operating on the intake and outlet side cams and the intake valves, is now able to de-throttle the engine under partial load to save fuel.
A new eight-speed ‘PDK’ dual-clutch transmission packs a completely revised gear set, and the final drive ratio is longer. Maximum speed (a lazy 308km/h in the CS) is achieved in sixth gear.
The front diff in the AWD C4S is now water-cooled for improved durability, with the map-controlled multi-plate clutch able to deliver a maximum 50:50 front to rear variable torque split, although Porsche says that would only ever happen on snow and ice.
Claimed fuel economy for the combined (ADR 81/02 - urban, extra-urban) cycle is 8.3L/100km, the twin-turbo six emitting 194g/km of CO2 in the process.
Over roughly 350km of city, suburban and freeway driving (much of it 'enthusiastic') we recorded 10.9L/100km (at the bowser) An impressive number for such a strongly performance-focused machine.
Minimum fuel requirement is 98 RON premium unleaded, and you'll need 60 litres of it to fill the tank.
Of course, Porsche claims improved fuel economy and lower emissions to go along with the 911’s boosted performance.
Stated fuel economy for the combined (ADR 81/02 - urban, extra-urban) cycle is 9.5L/100km in the CS, and 9.6L/100km in the C4S. Hardly frugal, but not bad for cars with such huge performance potential.
CO2 emissions are rated at 216g/km for the CS and 219g/km for the C4S, and the standard auto stop-start function is relatively subtle.
Minimum fuel requirement is 98 RON premium unleaded. You’ll need 64 litres of it to fill the CS’s tank, and 67 litres to brim the C4S.
Let's get it out of the way. The M4 CS is fast. Anything running 0-100km/h in less than four seconds gains admission to a seriously rapid club, and BMW claims 3.9sec for this car (an exact match for the soon-to-arrive Merc-AMG C63 S Coupe).
We might have given the standard launch-control system a go, and may be able to confirm straight-line acceleration from step-off will compress your chest like an over-zealous lifesaver at CPR practice.
But just as impressive is the in-gear thrust, with 80km/h to licence loss (120km/h) covered in only 3.4sec. Which plays to the twin-turbo six's strength, with maximum torque arriving at a relatively high 4000rpm, and remaining on tap until 5380rpm.
Power doesn't reach its peak until 6250rpm, with the rev ceiling sitting at 7600rpm; impressively high for a twin-turbo engine.
Everything from the DSC, ABS, and active suspension to the active diff, electrically assisted steering and seven-speed, dual-clutch transmission has been tuned specifically for the M4 CS.
The 'M DCT' auto is agreeably civilised at parking speeds, yet shifts positively and rapidly, especially in manual mode, under pressure at higher pace.
An M Sport exhaust system features electronically controlled flaps sitting directly in front of the rear mufflers, and varies the intensity of the accompanying soundtrack according to drive mode and level of aggression. It sounds suitably angry, but those hoping for the soaring purity of say the (S54) naturally aspirated in-line six found under the bonnet of the E46 M3 will be left hankering for the good old days.
Front suspension is a modified MacPherson strut design, with a five-link set-up at the rear, and data from wheel-acceleration sensors on each corner is used to recalibrate each damper's setting every 2.5 milliseconds.
The drivetrain, suspension and steering can each be dialled into 'Comfort', 'Sport' or 'Sport+' modes, and the CS's ride changes markedly in the switch from Comfort to Sport; the former proving compliant and smooth rolling over rough city surfaces, and the latter keeping things reassuringly buttoned down on a B-road blast.
Although BMW says that, unlike the M4 GTS, it has deliberately steered the M4 CS away from a focus on the circuit (no roll cage, no adjustable splitters or spoilers) we'd suggest it's best to keep the Sport+ suspension setting for track days unless you're already planning on replacing some of your older fillings.
Speaking of track days, BMW says the M4 CS's dynamics were “honed on the Nurburgring Nordschleife” where it's recorded a best lap time of 7:38, which is as fast as a Ferrari 458 Italia and Lexus LFA. That's very, very impressive.
At 1580kg the M4 CS is 35kg lighter than the M4 Competition (1615kg), and just five kegs under the Pure (1585kg), so despite all the light-weighting hype it's worth remembering we're still looking at a car tipping the scales at just under 1.6 tonnes.
The electromechanical steering can also be tuned through the three performance modes, and Sport delivers the best combination of quick turn-in, agreeably linear assistance and decent road feel.
But putting the CS's power down out of even moderately quick, tight corners is less convincing. The big forged-alloy rims (19-inch front, 20-inch rear) are shod with ultra-high-performance Michelin Pilot Sport Cup 2 rubber (265/35 front – 285/30 rear).
Squeezing the power in smoothly but quickly, the semi-slick tyres feel like they need more heat in them. Without going anywhere near the DSC's more taily 'M Dynamic' modes, and despite the active diff, the rear of the car will squirm when fed full throttle acceleration on corner exit, unsettling overall balance. Less edgy Michelin Pilot Super Sport tyres are a no-cost option.
The standard M sport front seats look the part (the M4 logos in the backrest illuminate!) and grip firmly without any discomfort for this 183cm tester.
And when it comes to slowing everything down, the standard brakes run to big ventilated discs front and rear, clamped by four-piston calipers at the front, and two-piston at the rear.
Our test example was optioned with the $15,000 'M carbon ceramic' package featuring humungous carbon rotors, thumping six-piston calipers up front, and four-piston rear. For that money you'd expect Le Mans-style braking performance, and while we didn't exactly put them to a 24-hour high-speed test, firm application of the left-hand pedal will consistently stand the car on its nose.
The local 911 launch program took in open rural roads in McLaren Vale (south-east of Adelaide), South Australia and The Bend Motorsport Park, a slick new facility privately developed from Mitsubishi Australia’s former proving ground at Tailem Bend.
Over two days we were able to push the CS and C4S coupe as hard as we dared, and let’s get it out of the way up front, the new 911 is fast.
With the optional Sport Chrono package the roughly 1.5-tonne C4S will accelerate from 0-100kmh in just 3.4 sec. Even in its ‘slowest’ non-Chrono CS form that number only drops by three tenths.
On top of these performance figures it also manages to magic up an engine and exhaust sound that’s a beat-for-beat match for naturally aspirated 911 flat sixes of old. There’s no synthetic skulduggery here, just skilful manipulation of the exhaust system, getting a pitch-perfect amount of gas past the turbos into grateful ear drums.
The 3.0-litre flat six produces its maximum 530Nm of torque from 2300-5000rpm, with peak power (331kW) taking over at 6500rpm. The fat mid-range pushes you firmly back in your seat with a simple squeeze of the right-hand pedal, and the engine’s revvy nature makes the temptation to visit the 7500rpm rev ceiling almost irresistible.
Porsche knows its way around a dual-clutch transmission, and the new eight-speed PDK delivers rapid fire, positive shifts up and down the ratios, with the slender alloy wheel-mounted paddles adding to the immediacy and fun.
A big question is, in its creep from small and light to bigger and heavier has the 911 lost its ability to form a direct and intimate relationship with its driver. After all, thanks to added safety and performance hardware this car’s a full half tonne heavier than the ‘901’ original. The answer is an emphatic no.
The strut front, multi-link rear suspension set-up continues, with active dampers (PASM) and active anti-roll bars standard. In Comfort mode the 911 rides incredibly well, even over the coarse chip rural surfaces covered on the launch. Despite monster Goodyear Eagle F1 high-performance rubber (245/35 20 fr - 305/30 21 rr) general noise, vibration and harshness levels are impressively low.
But switch up into the more dynamic modes and you’ll really start to bond with the new 911. The slightly quicker electrically-assisted steering points beautifully, with the variable assistance ramping up in superbly linear fashion.
I remember widespread hand-wringing and gnashing of teeth when Porsche moved the 911 to electric steering. No need to have worried, road feel is even more present in this latest gen version.
Hot lapping The Bend’s 4.95km International Circuit (one of four layouts available) amplified the new car’s abilities, not to mention its ergonomic excellence.
‘Porsche Torque Vectoring Plus’ (PTV Plus) packs in an electronically regulated rear diff lock with fully variable torque distribution and the car opens up a clear conversation as the limits of adhesion arrive.
Basically, the new 911 turns go-fast wannabes into track-day super heroes, its every movement felt immediately through the fingertips and seat of the pants. Speaking of which, the standard sports front seats are brilliant, and the new design steering wheel is perfect.
It remains balanced and predictable at speeds that would have the constabulary locking the cell door and throwing away the key, steady and easily steerable with the throttle through hold-your-breath quick corners.
There's precious little difference between the CS and C4S. Yes, the AWD car grips even harder at the front end, but the rear-drive car feels lighter in the nose and that bit more responsive to steering input. Really, there's not a struck match in it.
Then there’s the brakes, and oh how good they are. A ceramic composite brake package (complete with black calipers) is a $20,500 option. I’d advise buying a Yaris SX as a weekday runabout instead because the standard stoppers are brilliant.
Huge ventilated cast iron rotors (350mm front and rear) are clamped by red six-piston monobloc calipers at the front and four piston units at the rear. Despite lap after hot lap (tailing various tame racing drivers) the left pedal lost none its response or effectiveness. Amazing.
We also got to play with Wet Mode through a simple figure eight exercise on a soaking skid pan, and it makes a distinct difference without shutting down the fun. Yes, the throttle’s softer, but the engine still revs freely, the car remaining stable and predictable in what equated to torrential conditions.
The BMW 4 Series (and by extension the M4 CS) hasn't been assessed for crash safety by ANCAP or EuroNCAP, but boasts a solid array of active and passive safety tech, with several notable omissions.
To help you avoid a crash the M4 CS features ABS, brake assist, EBA, EBD, 'Cornering Brake Control' (CBC), Dynamic Stability Control (DSC), Dynamic Traction Control (DTC) and dry braking, 'Emergency stop signal', lane-departure warning and a tyre-pressure-monitoring system.
M4 owners also receive a complimentary BMW Intensive Driving Experience course (one person per vehicle purchase), which is arguably the best crash prevention measure of all.
But significantly, there's no AEB (Auto Emergency Braking) or other, more recent safety bits and pieces (found on other current BMW models) like blind-spot monitoring, forward-collision warning, fatigue detection, reverse collision avoidance, or speed-sign recognition and warning.
If all else fails and a collision is unavoidable passive safety tech runs to head and side airbags for the driver and front passenger, as well as curtain airbags covering front and rear. But again, things like an active bonnet and active front head restraints, fitted elsewhere in the BMW world, are MIA.
There are ISOFIX child-restraint anchors with top tether points in each of the rear seat positions.
Although the new 911 hasn’t been given a safety rating by ANCAP or Euro NCAP, you could argue its exceptional dynamic ability represents one giant, five-star safety feature. But specific active techology includes ABS, BA, forward collision warning, lane change assist, stability and traction control, and AEB (operating up to 85km/h).
You’ll also pick up a reversing camera, ‘Parking Distance Control’ (front and rear) and a tyre pressure monitoring system.
The standard ‘Wet Mode’ uses sensors in the wheel arches to pick up the sound of water splashing off the tyres. It then preconditions the brakes and other control systems as it warns the driver, who can then push a button or use the rotary dial on the steering wheel (‘Sport Chrono’ package) to change modes.
Once activated, Wet Mode connects ‘Porsche Stability Management’ (PSM), ‘Porsche Traction Management’ (PTM), the car’s adjustable aerodynamics, and the ‘Porsche Torque Vectoring (PTV) Plus’ system, to set the car up for best possible stability.
At 90km/h and above, the rear spoiler goes to its "maximum downforce" position, the engine cooling flaps open, the accelerator pedal response is flattened off and Sport mode can’t activated. Read all about how it feels in the ‘What’s it like to drive?’ section.
But if all that fails to side-step a crash the airbag count runs to six (dual front, dual front side and dual thorax). And both rear seat positions incorporate top tether and ISOFIX anchors for child seat/baby capsule location.
Warranty cover is three years/unlimited km, with 24/7 roadside assistance included for three years, and additional support from BMW 'Servicemobiles' (07:00 – 23:00 every day) staffed by trained techs and stocked with key service parts.
Maintenance on all BMW 4 Series models is controlled by a 'Condition Based Servicing' system which piles real-time data (mileage, time since last service, fuel consumption, and how the car has been driven) into a specific algorithm to determine whether an annual vehicle inspection or (oil) service is due.
The 911 is covered by Porsche’s three year/unlimited km warranty, with paint covered for the same period, and a 12-year (unlimited km) anti-corrosion warranty also included. Certainly off the mainstream pace, but possibly modified by the number if kays a 911 is likely to travel over time.
Porsche Roadside Assist provides 24/7/365 coverage for the life of the warranty, and after the warranty runs out is renewed for 12 months every time the vehicle is serviced at an authorised Porsche dealer, and the main service interval is 12 months/15,000km.
No capped price servicing is available, with final costs determined at the dealer level (in line with variable labour costs by state/territory).