Aston Martin DBS vs BMW Alpina B4

What's the difference?

The Aston Martin DBS Superleggera is an instant classic, likely heading over a high-end auction block in years to come with a final price far higher than the 2020 ask. But don’t buy it as a collector's item, although it is a beautiful object. Buy it to enjoy. Stunningly fast, thoroughly engineered, and beautifully made, it’s a phenomenal car.

You could almost call the B4 S the anti-M4. It's still fast and practical but from a completely different perspective. It's much more a grand tourer than the M4 and even with the Akrapovic exhaust (usually a byword for joyous, anti-social racket), subtle.

For some, the price won't matter because the Alpina delivers what they want - M4-like straight line performance without the histrionics or the uncompromising chassis. And there's also a bit of that perverse exclusivity of the styling that you won't get anywhere else.

The term Superleggera (Italian for Superlight) is normally associated with Italian automotive coachbuilder Carrozzeria Touring, which has historically applied its fine eye and hand-crafted aluminium body technique to a host of local brands, including Alfa Romeo, Ferrari, Lamborghini, Lancia, and Maserati.

As well as some American, German, and British liaisons, the latter covering classic Aston Martin and Lagonda models through the 1950s and ‘60s (your Silver Birch DB5 is ready for you 007).

But rather than hand-beaten aluminium, here the body panel material is carbon-fibre, and the look and feel of this DBS is the product of Aston Martin’s head of design, Marek Reichman (his name might sound German, but he’s a Brit through-and-through), and his team at the brand’s Gaydon HQ.

Based on the DB11 platform the DBS is a fraction over 4.7m long, just under 2.0m wide, and less than 1.3m tall. But it’s only when you’re close to the Superleggera that its intimidating muscularity comes into focus. 

A giant, black honeycomb grille defines the car’s face, and the single-piece forward-hinging ‘clamshell’ bonnet includes a raised central section defined by longitudinal strakes either side, with deep vents above the front axle line to aid the exhaust of hot air from the engine bay below.

Broad ‘shoulders’ around the front wheel arches are balanced by powerful rear haunches to give the car a beautifully proportioned and imposing stance. But there’s scientific function behind this purposeful form, too. 

The Aston vehicle dynamics team went all out with wind tunnel testing, Computational Fluid Dynamics (CFD) modelling, aerothermal and performance simulations, as well as real-world track testing to refine this car’s aero efficiency. 

The DBS Superleggera’s overall drag coefficient (Cd) is 0.38, which is commendably slippery for a brawny 2+2 GT. But it’s the fact that in parallel with that number it’s able to generate a humongous 180kg of downforce (at 340km/h VMax) that’s remarkable.

The aero trickery includes a front splitter and airdam working in unison to accelerate airflow under the front of the car, delivering downforce and cooling air to the front brakes. 

From there the ‘open stirrup and curlicue’ device at the top of the front wheel wells vents air to reduce lift, and create vortices which reattach the aero wake from the front wheels to the side of the car.

The ‘C-Duct’ starts with an aperture behind the rear side glass funneling air through the underside of bootlid to a subtle ‘Aeroblade II’ spoiler at the rear of the car. A close to flat underside also feeds air to an F1-inspired double diffuser under the rear end.

No gaudy wings or giant spoilers, just a subtly effective and thoroughly engineered aero profile.

Slim but distinctively Aston Martin LED tail-lights combine with a series of horizontal character lines across the rear to enhance the car’s visual width, and giant 21-inch dark rims fit the car’s proportions perfectly.

Slipping behind the wheel is the full hand-in-leather glove experience. The broad dashtop is split by a vaguely teardrop shaped centre stack with the classic ‘PRND’ transmission buttons and an illuminated push-button starter in the centre.

The compact instrument binnacle, housing a configurable digital display, imparts a quiet sense of purpose, and the Mercedes-AMG sourced media system, complete with rotary control dial, feels familiar. Overall, simple, subtle, yet hugely impressive.

Alpina has always had a particular aesthetic that could uncharitably be termed as mid-'80s West German - all set square angles and body graphics. Think David Hasselhoff's Berlin Wall look. The company has never really deviated from adding squared-off body bits to the various BMWs it has rebadged under its long-running agreement.

For the B4S, Alpina adds the signature billion-spoke alloy wheels (only a slight exaggeration), a new front splitter complete with Alpina lettering, a weirdly proportioned boot lid lip spoiler and - not even joking - pinstripes. Like I said, mid-'80s West German. You can still recognise the sleek 4 Series Coupe but perhaps the worst of it is the super-sized, wonky-looking ALPINA B4S on the boot.

Inside is rather more restrained apart from the ill-fitting Alpina plaque under the climate control. Again, it's all 4 Series in here, with the lovely Merino leather liberally applied across the cabin. Less lovely is the wood on the door pulls and console but the door cards have an oddly appealing woven leather which looks and feels good.

Sadly the standard 4 Series steering wheel is along for the ride. There's nothing wrong with it - although the Alpina logo does look out of place - but if I were a product planner, I'd beg for the lovelier M wheel.

The notion of practicality doesn’t naturally align with a 2+2 GT, but a wheelbase measuring 2805mm means there’s enough space between the axles to provide generous accommodation for front seat occupants at least.

And the usual compromises presented by long coupe doors are reduced by the DBS’s swinging slightly up as they open, and down as they close. A genuinely useful touch.

The driver and front seat passenger are snug but not cramped, which feels right in this context, and they’re provided with a lidded central box, which doubles as an armrest between the seats.

Flick the switch and its power-operated top slides back in stages to reveal two cupholders and a general storage space with a 12V power outlet, two USB-A ports, and an SD card input at the rear.

There’s a small coin tray in front of the multimedia dial in the centre console and long door pockets, but bottles will be a struggle unless you’re happy to lay them on their side.

The ‘+2’ seats scalloped out of the rear bulkhead, look super cool (especially with our car’s Triaxial quilt trim) but for anyone in the vicinity of average adult height they’ll feel distinctly inadequate.

Legs or a head aren’t viable options so this space is best reserved for the kids. And there are two 12V sockets in the rear to help keep their devices charged, and them calm.

Boot volume is a useful 368 litres, and the aperture curves forward at the top which helps with loading larger cases, but remember the rear seats don’t fold.

There are small lockers hidden in the back wall, one containing a flat tyre repair kit, so don’t bother looking for a spare of any description.

If you're in the front, you're in luck - it's a comfortable place to be, with plenty of leg and headroom. Down back isn't terrible despite the coupe roofline. The two seats are nicely shaped for maximum comfort and separated by an odd plastic tray. The fold-down armrest has two cupholders.

Front seat passengers score a pair of cupholders (bring the total to four for the car) and the long doors will hold a bottle each.

The boot swallows a reasonable 445 litres, which isn't at all bad.

If you thought BMW don't mess about when pricing up its cars, you best strap yourself in. The 440i-based B4S starts at a solid $149,900. That's $48,000 more than the 440i and significantly more than an M4 Pure. But there's plenty of gear on offer and some genuine, bespoke Alpina additions.

Standard are 20-inch signature Alpina alloys, 16-speaker harmon kardon-branded stereo with DAB, super-soft Merino leather everywhere, dual-zone climate control, around-view cameras, reversing camera, sat nav, keyless entry and start, front and rear parking sensors, active cruise control, heated and electric front seats, head-up display, auto headlights and active LED headlights, LED taillights and electric sunroof.

The stereo and sat nav are run by BMW's iDrive. It's a cracker of a system and almost gets away without Apple CarPlay and Android Auto. The absence of such simple pleasures at this price point is a bit lame, but here we are.

The DBS Superleggera is powered by an all-alloy, 5.2-litre twin-turbo V12, featuring dual-variable camshaft timing and direct-injection to produce 533kW (715hp) at 6500rpm and 900Nm from 1800-5000rpm. 

In line with the personal nature of this car’s build, a brushed metal plaque sits on top of the engine, proudly stating ‘Hand built in England’, and noting that a final inspection was carried out (in our case) by Alison Beck. 

Drive goes to the rear wheels via an alloy torque tube and carbon propshaft to a (ZF-sourced) eight-speed automatic transaxle, incorporating a mechanical limited-slip differential, with manual shifts available via wheel-mounted paddles.

A lot of your extra money turns up under the bonnet. These days the 440i packs BMW's slick B58 turbo straight six and the B4S does likewise. The boys from Buchloe in Bavaria (there are certain to be women there, too, I just liked the alliteration) added a pair of Alpina-spec turbos to generate a whopping 324kW and, more importantly, 660Nm. Alpina says 600Nm (the max torque figure of the brilliant M4 CS) is available from 2000-5000rpm, while the full 660Nm is available from 3000 to 4500rpm.

The M4 Pure has 317kW and 550Nm from the S55 straight-six. Just so you know.

Like the 440i but unlike the M4, the B4S employs the dependably brilliant eight-speed ZF automatic found throughout the BMW range.

Claimed fuel economy for the combined (ADR 81/02 - urban, extra-urban) cycle is 12.3L/100km, the DBS emitting 285g/km of CO2 in the process.

In just under 150km with the car, covering city, suburban and freeway running (as well as a sneaky B-road session) we recorded an average of 17.0L/100km, which is a sizeable number, but kind of expected for a roughly 1.7-tonne, V12-powered meteor on wheels.

Stop-start is standard, minimum fuel requirement is 95 RON premium unleaded, and you’ll need 78 litres of it to fill the tank (which translates to a real world range of approximately 460km).

Alpina quotes 7.9L/100km on the combined cycle and we went through the premium unleaded at the rate of 11.7L/100km. I enjoyed myself, so that's not a terrible result.

Once you dip under three and half seconds for the sprint from 0-100km/h strange things happen to your field of vision. Faced with that kind of acceleration, it instantly narrows, your brain instinctively focusing attention on the road ahead because it senses something borderline unnatural is going on.

Claiming just 3.4sec for the DBS Superleggera to hit triple figures (and 0-160km/h in 6.4sec!) we felt obliged to validate the number, and sure enough peripheral vision blurred into nothingness as this brutal machine delivered its shock and awe performance.

And the aural accompaniment is suitably intense, thanks to the electronically-controlled (stainless steel) exhaust, with active valves and quad tail pipes, orchestrating the brilliantly guttural and raucous ‘sound character.’ 

Pure pulling power is immense with all 900Nm of maximum torque available from just 1800rpm all the way to 5000rpm. Mid-range urge is prodigious, and Aston claims the DBS Superleggera will blast from 80-160km/h (in fourth gear) in 4.2 seconds. That’s a number I didn’t verify, but I’m not going to doubt it.

It might share essentially the same bonded aluminium chassis, but thanks to its carbon-rich bodywork the DBS Superleggera is 72kg lighter than the DB11, with a ‘dry’ weight (no fluids) of 1693kg. The engine is also set low and far back in the chassis, to the point where it’s actually a front-mid location, delivering a 51/49 front/rear weight distribution.

Suspension is double (forged alloy) wishbone front, multi-link rear, with adaptive damping standard, and there are three set-up stages available via the flick of a switch on the left-hand side of the steering wheel.

On the opposite side of the wheel a similar mode control allows you to cycle through ‘GT’, ‘Sport’, and ‘Sport Plus’ settings, tuning various functions including the throttle map, exhaust valves, steering, traction control, and shift response. Steering is speed-dependent electrically-assisted.

Brakes are professional grade vented carbon ceramics, with thumping 410mm rotors at the front clamped by six-piston calipers, and 360mm discs at the rear sporting four piston calipers.

Managing this car’s phenomenal thrust as it morphs into lateral g-force, is a surprising experience. Of course, it grips like a Trump handshake, with a specific ‘A7’ version of Pirelli’s ultra-high performance P Zero tyre on a 21-inch forged alloy rim at each corner.

The 265/35s at the front are big, and monstrous 305/30s at the rear deliver a strong mechanical connection with the road. But it’s the car’s steering and overall agility that’s unexpected.

It doesn’t feel like a beefy 2+2 GT. And while it’s not in the 911’s league when it comes to response and dynamic feedback, it’s a long way down that road.

I found Sport and the middle suspension setting to be the backroad sweet spot, and with the seven-speed auto in manual mode the lightweight DBS simply lights up.

Shifts on the way up the ratios via proper alloy paddles in manual mode are rapid and precise, and the car remains stable and balanced, yet entertainingly athletic in enthusiastic cornering.

When squeezed hard on initial application carbon ceramic brakes don’t ‘bite’ in the same way steel discs do, but the system’s ability to rapidly wash off speed, while the car remains in a steady state, is exceptional.

At the same time, shifts down through the gears are accompanied by a variety of aggressive pops and bangs (a feature of Sport and Sport Plus modes) and the DBS points accurately yet progressively into a bend.

Road feel is excellent, the sports front seat is grippy and comfortable, and the car’s ‘Dynamic Torque Vectoring’ (via braking) system chips in to ensure understeer is kept in check.

In a more sedate mode, thanks largely to the active dampers, the Superleggera is surprisingly comfortable around town, despite the big rims and low-profile rubber.

Under the heading of ‘random thoughts’, the simple interior layout (including the spot-on digital instrument cluster) is great, the auto stop-start is a little jerky on restart, and including the front air dam, ground clearance under the nose is only 90mm, so be mega-careful in and out of driveways, or prepare yourself for the sound of scraping carbon (happily avoided this time around).

One of the key differences between the B4 and M4 is the ride. While the M4 can crash over bumps and generally be a little hard to live with, the crew in Buchloe have gone after a much more plush ride. And in that they have succeeded because the B4 S is a mighty fine cruiser. Bumps are dismissed with a haughty disdain, even Sport + silliness doesn't completely write-off ride quality.

Very impressive too, is the steering. While still not at Lotus Elise levels of feel (few cars are), the Alpina tweaks connect the your palms to the road with more clarity than what you'll find in the 440i or M4. Where the M4 particularly adds too much weight, the 440i is a bit more circumspect in that regard.

And then we come to the engine. The B58 six is a belter, better even than the N55 that preceded it. It's still a 3.0-litre straight six but is part of BMW's modular engine family that starts with a 1.5-litre triple in the Mini and 1 Series. The Alpina-spec turbos are noisier, the Akrapovic exhaust lighter and also noisier. It doesn't have the all-out crackle and pop of an Audi or Merc (perish the thought), but when you're on it, the B4 means business. The 660Nm of torque, available over a wide rev range, delivers a steel fist wrapped in a velvet glove and bubble wrap - the speed builds rapidly but smoothly. 

The approach to the chassis tune seems to be based on the driving talents of mere mortals on normal roads, which is kind of like the 440i. It's terrific fun to drive hard but it's very forgiving and patient. The great thing about it is that you wouldn't think twice about jumping in it for the long haul, so comfortable and quiet is the cabin. The M4 will leave it for dead on a winding road, but that's perfectly fine.

One irritant is the replacement of the admittedly cheap BMW gearshift paddles with weirdly non-tactile buttons. They're not particularly easy to use and, probably worse for a sporty car, unsatisfying. It's an odd detail with which to go off the reservation. Cheeringly, the eight-speed ZF is its usual perfect self, so you don't have to worry too much about manual mode or go old school and use the shifter.

The Alpina ships with six airbags, ABS, stability and traction controls, ABS, stability and traction controls, forward collision warning, forward AEB, road sign recognition and active cruise control.

There are also two ISOFIX points in the rear. Neither the Alpina nor the 4 Series has an ANCAP safety rating.

In Australia, Aston Martin offers a three-year/unlimited km warranty, with 24-hour roadside assistance included for the duration.

Servicing is recommended every 12 months or 16,000km, whichever comes first.

Aston also offers extended service contract options, renewable after 12 months, including features like transfers and accommodation in the event of a breakdown, and coverage while the car is being used at official Aston Martin events.

There’s also a collection and delivery service (or courtesy car) to sweeten the servicing deal.

Alpina offers a two-year/unlimited-kilometre warranty which is a bit behind the times and not in keeping with the price point. Servicing is another matter altogether and you're subject to your dealer's standard charges for servicing.