BMW M240I vs Audi RS5

What's the difference?

When BMW is on a roll, the world needs to watch out.

And, as our Thundernight metallic-hued M240i so literally demonstrates, its purple patch continues after a string of modern marvels like the latest 4 Series and iX, distilling the essence of compact sports coupe and luxury cruiser with dizzying confidence.

Joining the pantheon of back-catalogue greats like the 2002ti and 330Ci, we're missing it already now that the keys have been returned. Isn't that the true sign of the quintessential BMW experience?

Good looking, good to drive, and good to simply sit in, the Audi RS5 range ticks plenty of premium boxes. Whether you can live with the practicality pitfalls of the Coupe is up to you, but if you can't, might I suggest taking a wander over to our RS4 Avant review?

What is happening with BMW design? It's as if the Germans have run out of ideas.

Though we're eternally grateful it exists, the G42 is the least pretty of the three 1 and 2 Series coupe generations, as well as the most aggressively styled. All the usual macho tropes are present – cab-backward long-bonnet/short boot silhouette with an exaggerated dash-to-axle ratio, huge front air intakes, bulging bonnet and diffuser-heavy rear end.

There's also a beady eyed look to this M240i, with its squinty headlights and angry tail-light shapes further piling on the attitude. It's a far cry from the simple elegance of the E82 original, let alone the classic E30 of the Eighties. We wonder how much extra the M2 version will be when it surfaces later on.

That said, the G42's design is in keeping with something wearing an M-something-something prefix. In the optional purple of our press car, it certainly turns heads. That said, in the Bangle era, BMWs didn't have to rely on paint to do that.

Bangle, by the way, refers to BMW's late '90s/early '00s head designer Chris Bangle, an American with a bold aesthetic, scant regard for tradition and a taste for the controversial. His effect on vehicle styling, starting with the 2001 7 Series, is still felt today.

Dimensionally speaking, comparing the length/width/height/wheelbase measurements of the M240i (4548mm/1838mm/1404mm/2741mm) with a 2000 E46 330Ci (4488mm/1757mm/1369mm/2725mm) shows how today's coupe is palpably larger.

Over the previous (F22) 2 Series, the newcomer is 105mm longer, 64mm wider and 28mm lower; the wheelbase has been stretched by 51mm, while the front and rear tracks are 63mm and 35mm further out, respectively. Result? More space inside for today's lucky occupants.

I defy anyone to describe the RS5, and especially the Coupe, as anything but stunning. Seriously, the near perfect proportions and swept-back styling make it look fast even when it's parked. 

Up front, there's a new-look black-mesh grille that's been given a 3D effect, like it juts out over the road in front it, while the thing headlights have been carved back into the body work like they're been windswept under hard acceleration.

The 20-inch darkened alloys fill the arches, too, with a sharp body crease that runs from the front headlight all the way back to the bulging shoulder lines above the rear tyres accentuating the curves.

Inside, the RS5 is a sea of black Nappa leather and sporty touches, and we particularly like the chunky, flat-bottomed steering wheel, which both looks - and feels - great.

Interior dimensions may not be paramount to most coupe purchasers, but a stylish one with quality fittings and generous equipment levels certainly is, and here the M240i is bang-on brand.

For a compact two door, the M240i is pleasingly accessible. Long doors and a tallish roof help entry/egress, into a 2+2 cabin that obviously prioritises front-seat occupants. And it does that exceedingly well.

There's space to stretch – even if you're two metres tall – up front, as long as the rear seats aren't occupied, as a result of generous leg and shoulder room, while headroom should also be sufficient, even with the sunroof fitted. We're talking about a small coupe, remember, so that's impressive.

Vision out isn't as bad as you might imagine, either, due to the airiness that the elongated side windows provide. There are blind spots, though, with the B-pillar being the worst, but at least the extensive camera and sensor network surrounding the car provide reassuring back-up.

The handsome M Sport front seat option ($2000 extra) look like they mean business, providing all the comfort, support and adjustment most occupants will ever need. They're firm enough when you need them yet restfully supple all the time. Backed up by a multitude of electronics, both buckets will brace people of pretty much all sizes, while the driver has the luxury of two memory settings that also take in mirror positions.

Remember how the new 2 Series comes via Mexico? You'd never know it wasn't built in Germany, from the solid build quality and expensive materials to the extremely welcome absence of squeaks and rattles. No area exposed to the occupants looks or feels cheap.

Also meeting expectations is the dashboard itself, which is essentially a scaled-down replica of every recently released BMW – futuristic and fabulous iX aside – since the current (G20) 3 Series in 2018 broke the Bangle-era curse of disappointing new-millennial models.

If you're hoping for a return to classic analogue instrument dials, forget it. The M240i's instruments are modish electronic items, providing plenty of vehicle and driving data, and supported by an excellent head-up display. Like the switches and buttons, they're easy to fathom, with little familiarisation required.

As we've said repeatedly in other BMW reviews, the iDrive multimedia controller is amongst the best in the business, responding instantly to inputs. The other basics – ventilation, storage, driving position – are also first class. Nothing to complain about here. The company is on a good thing and it's sticking with it.

Accessing the rear seats is aided by electrified front seats that slowly whir forward, to provide a big-enough aperture for your medium-build 178cm tall tester to squeeze in.

Once sat, with legs splayed apart, there's just enough space for another person of similar height and proportions, as well as surprisingly decent levels of vision thanks to the narrow front bucket seats and extended rear glass area, to offset any feelings of claustrophobia.

BMW has also provided several welcome amenities, including face-pointed rear vents with full single-zone temperature control to serve two occupants back there, armrests (with the centre fold-down item also packing in a pair of cupholders), reading lights and coat hooks.

Sadly, however, the rear windows do not retract, and the thick door pillars are fixed, so you cannot enjoy a pillarless hardtop experience. That's what the M4 coupe (and convertible too) is for.

While rear-seat space is adequate, with enough room for shoulders, thighs and feet if the front-seat occupants don't mind raising the cushion a little, the backrest is too upright to be considered comfortable on longer journeys. At least the low cushion is scalloped enough to provide some support, though, again, not over extended periods.

That rear backrest folds, by the way, to a 40/20/40 split, providing access into the 390-litre boot while still able to accommodate a single passenger. The lid opens up and wide, offering up a long, flat and wide space for storage. Along with a 12V outlet and tie-down hooks, you'll find a tyre-repair kit, since no spare wheel is carried.

We only tested the Coupe, and I can tell you that the practicality perks on offer largely depend on where you're sitting.

Up front, you're spoiled for room in the two-door Coupe, with the two spacious seats separated by a sizeable centre console that's also home to two cupholders and a variety of cubbies, with extra bottle storage in each of the front doors. 

The back seat, though, is a little, or a lot, tighter, with come acrobatics required to even climb into it, given the Coupe only has two doors. The Sportback offers two more doors, which will surely make the process a little easier. 

The Coupe measures 4723mm in length, 1866mm in width and 1372mm in height, and will deliver a decent 410 litres in luggage space in the boot. The Sportback measures in at 4783mm, 1866mm and 1399mm, and boosts your luggage space to 465 litres.

Either vehicle has your tech needs sorted, with an abundance of USB and power outlets serving both front and backseat riders.

It's available as a Coupe or a Sportback, but either way, the RS5 commands a $150,900 asking price. And that's not chump change, but Audi's performance model does come with a lot of bang for those bucks.

We'll get to the engine and safety stuff in a moment, but in terms of fruit, you'll find 20-inch alloys outside, as well sportier RS body styling, sport brakes, Matrix LED headlights, keyless entry and push-button start and heated mirrors, a sunroof and privacy glass. Inside, there's Nappa leather seats (heated in the front), illuminated door sills, stainless steel pedals and ambient interior lighting.

The tech stuff is handled by a new 10.1-inch central touchscreen that gets both Apple CarPlay and Android Auto, as well as Audi's Virtual Cockpit, which replaces the dials in the driver's binnacle with a digital screen. There's also wireless phone charging, and a killer 19-speaker Bang and Olufsen sound system.

As with all of our current favourite BMWs that aren't electric on full-fledged M cars, the M240i is fitted with a variation of the divine B58 engine – a 2998cc 3.0-litre double overhead cam direct-injection turbo I6. It delivers 285kW at a heady 6500rpm, and 500Nm of torque between a low 1900rpm and 5000rpm.

A kerb weight of 1690kg (200kg more than the 220i equivalent) means the M240i's power to weight ratio is about 169kW/tonne, which may explain why it can manage the 0-100km/h time in 4.3 seconds. V-max is 250km/h.

Power is channelled to all four wheels continuously via an eight-speed M Steptronic transmission, while the AWD system features a differential to help transmit torque to all four wheels more cleanly.

Controlling all those outputs, the M240i's suspension consists of a two-joint spring strut front and a five‑link rear axle arrangement, with M Sport suspension including variable sport steering, additional front axle struts, M Sport brakes, M Sport differential at the rear axle and adaptive M suspension with electronically controlled dampers.

Its a terrific engine, this - a twin-turbo 2.9-litre six-cylinder TFSI that will deliver 331kW at 5700rpm and 600Nm at 1900rpm, sending it thundering to all four wheels (because quattro) via an eight-speed tiptronic automatic.

That's enough, says Audi, to deliver a 0-100km/h sprint time of 3.9 seconds in the Coupe and the Sportback. Which is very, very quick.

Over exactly 503km of city, suburban, freeway and performance testing, we managed a credible 9.6 litres per 100km – and that was with the air-con on  constantly and regular visits to the 7000rpm rev limiter. No horses were spared in our quest to properly assess this vehicle.

BMW's official combined-average claim for the Euro 6d-rated M240 is 8.0L/100km flat – and 6.6L and 10.3L in the Extra Urban and Urban runs – for a carbon dioxide emissions average of 185 grams/km.

The small fuel tank swallows just 52 litres of E10, 95 or 98 RON (as tested) premium unleaded petrol, meaning an average of 650km between refills is possible.

The RS5 Coupe will sip a claimed 9.4L/100km on the combined cycle, and emit a claimed 208g/km of Co2. It's fitted with a 58-litre fuel tank. 

The RS5 Coupe will the same 9.4L/100km, but emit 209g/km of Co2.

In a word, invigorating.

Stuffing a big old engine in a little-ish car is always an exciting recipe for thrills, and the M240i Coupe does not disappoint.

Press the start button, and the sublime B58 3.0-litre turbo I6 growls into life, setting a rich tone for the level of performance as well as sophistication that's coming.

Even in Eco mode, off-the-line acceleration is stirring, with a hefty shove if you're in a hurry, or a brisk pace if you just long to just take it easy, defined by smooth upshifts from what remains one of the world's greatest-ever automatic transmissions.

That said, Normal is the default operating setting, and here the M240i can take on a Jekyll and Hyde split-personality, that goes well beyond simply possessing a strong throttle response accompanied by a soaring exhaust note. The engine sings sweetly even right up to 7000rpm, while the gearbox is uncanny in its ability to always be in the correct gear, yet will simultaneously hold each ratio in manual mode (via the shifter or paddles) if the driver needs to go hell-for-leather.

Speaking of which, in Sport mode, the 3.0-litre turbo goes into red alert, taking on a louder and more muscular mood, as it roars along with frenetic yet effortless speed. What seems like 90km/h can, in fact, be very much more, and with plenty of extra oomph in reserve.

It's so typical BMW that purists affronted by some of the brand's other niche offerings of late will cry with joy that the art of making a sports coupe has not been lost in Bavaria after all.

And that's before the first turn of that fat little steering wheel. Here the 2 Series Coupe's 3 Series-derived CLAR architecture's DNA is immediately obvious, providing subtle balance and an immersive connection to go with all that bolshy brawn.

The M240i will glide along precisely where pointed, sticking steadfast to the tarmac while cornering at speed without breaking a sweat. That mechanical rear diff helps provide both alacrity and reassuring control. Yes, it remains weighty and planted when punted relentlessly through tight corners, but it's also not as heavy-feeling as before.

Being AWD, there's grip galore to rely on for security, yet the M240i still seems deliberately rear-drive biased in its set-up, so the driver can hang the tail out if wanted with gradual ease in Normal, or with a little more of a sideways flick in Sport. The modes are configurable so the level of engine, steering and suspension responses can be tailored as desired, meaning that in the racy Sport Plus setting, with stability and traction controls on hold, the full oversteer experience is possible if you're game/brave/silly enough.

This car's brilliant performance is also down to incredibly dependable and nuanced braking, adding another layer of driver enjoyment, since it can pull up hard and fast if need be without drama or fuss.

So, it's no surprise to learn that an M-Sport-enhanced BMW can be a deliciously fast and limber along a mountain road.

But the real progress over the old F22 is just how suave and polished the G42 is if you're tired and stressed, isolating its occupants from the rigours of rubbish road surfaces. Kudos to the 'Adaptive M Suspension' and its adaptive dampers for this, for they're standard M240i fare. The resulting cushy ride completely broadens the dynamic bandwidth of this compact sports coupe, making it an everyday commuting proposition.

Ultimately, it's a bit of a struggle to find fault in the 2 Series' drivability and dynamic make-up. The usual Euro luxury car bugbear of too much coarse-chip tyre noise applies, but as this is a sports coupe, that's not such a big deal here. Even wind noise levels are subdued – all the better to drink in that glorious turbo engine wail.

BMW, you got the M240i delightfully right.

With our time behind the wheel limited to the RS5 Coupe, we can only really report on how the two-door feels on the road, but given the prodigious power on offer, it's unlikely the addition of two doors is going to make the Sportback any slower. 

In short, the RS5 is thunderously fast, collecting speed with utter nonchalance thanks to this thick and endless-feeling supply of power unleashed whenever you plant your right foot.

It makes even the most ham-fisted attempts at cornering feel fast as lightning, with the power flow able to make up for every slow entry and exit by simply piling on pace between bends. 

But that's what you expect from an RS model, right? So perhaps more impressive is the RS5's ability to transform back into a relatively sedate urban cruiser when the red mist subsides. The suspension is firm, especially over rough road surfaces, and you do need to be a little careful with the accelerator to avoid that lurching feeling at every green light, but driven calmly, it doubles as a everyday car quite nicely.

Like in the RS4, we did find the gearbox felt a little quick to change at pace, shifting up or down at strange moments on the way into or out of corners, but you can reclaim control via the paddle shifters.

The safety story begins with six (Coupe) or eight (Sportback), and the usual suite of braking and traction aids, but then climbs into the tech-savvy stuff from there.

You get a 360-degree camera, adaptive cruise with stop and go, active lane assist, front and rear parking sensors, AEB with pedestrian detection, rear cross-traffic alert, an exit warning system, blind-spot monitoring and turn assist, which monitors oncoming traffic when making a turn.

It's a lot of gear, and it all contributes to Audi's five-star ANCAP safety rating, awarded in 2017 to the A5 range.

Trailing all of its main luxury car rivals (except Porsche) by two years, BMW only offers a three-year/unlimited kilometre warranty, as well as three years of roadside assistance.

BMW says its vehicles' servicing is condition-based, depending on how they're driven and other factors, with a dash warning appearing to let the driver/owner know when it's time. We advise servicing your M4 annually or at every 10,000km

No capped-price servicing system is offered. However, as long as the first one is paid for before the first service on a new vehicle, the 'BMW Service Inclusive Basic packages' is available at extra cost, covering scheduled servicing for three years/40,000km or five years/80,000km. A 2 Series should cost from $1700 for the five-year/80.000km package.

Audi vehicles are covered by a three-year, unlimited-kilometre warranty, which is feeling more than a little underdone when compared to some competitors.

Services are due every 12 months or 15,000kms, and Audi allows you to pre-pay your service costs for the first five years, at a cost of $3,050.