Mistral is the final outing for Bugatti's mighty W16 quad-turbo engine. And what a way to bow out

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The Bugatti W16 Mistral is the final outing for Bugatti’s W16 engine after 20 years in production.

It's a fitting end for an engine that made its debut in the 2005 Veyron, back when the Volkswagen Group had its hand on the tiller and Ferdinand Piëch’s decadent hubris had him setting new standards and breaking records that nobody else would ever be inclined to approach.

He wanted a car that was as easy to drive as a Volkswagen Golf, met or exceeded VW’s existing or newly created quality and durability standards and, at the same time, you could climb into at the start of one of the straights at VW’s Ehra-Lessien test track and be doing 253mph by the end of it.

He and his boffins specified a W16 engine to do it. Four banks of four cylinders, eight litres in total, four turbochargers and a four- figure horsepower number when such things were unheard of at the time. The Veyron’s W16 made 1001 metric horsepower – 987bhp – and it only went north from there. 

Faster versions since have knocked off various round metric horsepower milestones to end up, here, with 1578bhp – a round 1600PS and the same as a Chiron Super Sport 300+.

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DESIGN & STYLING

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Other car companies, mostly smaller ones, have vied to take the ‘world’s fastest production car’ tag away from Bugatti over the years, and the list of outright fastest cars is both messy and disputed.

But the Veyron and Chiron, and all other derivatives with the W16, are proper production cars, built in (by the standards of cars such as these) genuinely significant numbers and to incredibly exacting standards. 

They’re into manufacturing the last of them now.

Fittingly, the final production W16s in assembly today consist of both track-special Bolides, in which the W16 is finally given its head in a car built specifically for a circuit, and these Mistrals, in which the engine’s performative audibleness is given perhaps its most notable outing. There will only be 40 Bolides, along with 99 Mistrals.

Mechanically the Mistral is largely the same as the Chiron, which means it's a carbon fibre car with the engine in its middle, two seats and a kerb weight of nearly two tonnes.

INTERIOR

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The cabin is roomy and beautifully finished, with a slightly different design feel from the Chiron coupé, which had Bugatti’s signature ‘C’ swoop up into a rooflining that in this case isn’t there. But the architecture is the same: two distinct ‘sides’, a widely adjustable steering wheel, no touchscreen, multi-functional controls on the centre stack. Material finish is as good as it comes.

It's extremely easy to get comfortable in and has simple controls. Knock the gearlever over to Drive and it's ready to go. Two pedals, good visibility, and comfortable and supportive seats. 

It would be quite undaunting if you didn’t know it costs five million quid. Such is the Bugatti way.

ENGINES & PERFORMANCE

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All engines make some kind of noise. Mostly though they only make one or two which, if you're lucky, are pleasant. In the Mistral's case I think I counted at least six distinctly different sounds. 

And if you time it just right, or get your throttle position just-so, you can actually pick and choose the ones you want to hear. 

You can lightly accelerate to get a significant turbo whistle; at around 2000rpm on a steady throttle there’s a really pleasing offbeat induction gurgle; and on lift- off from heavy acceleration there are some very amusing whooshes, like you’ve just catastrophically punctured a bouncy castle.

But the most spectacular thing happens when all of these accelerative sounds are playing together – a W16 tutti, if you will – as you accelerate from 3000rpm and the pathways to the second pair of this engine’s four turbochargers are finally allowed to crack open (they remain off limits at lower revs in order to reduce turbo lag).

Do you see those two inlets, above and behind the driver’s and passenger’s heads? Those are the engine’s air intakes. This 8.0-litre, 1578bhp engine ingests so much air on full throttle that you can feel the pressure change in your ears. 

It’s not loud in the wailing sense; it just feels whoppingly powerful. Sure, you’re aware that fuel is being burnt behind you. But you’re more aware of the amount of the Earth’s atmosphere the engine is wolfing down around your head as the car sucks in whatever is closest to it.

Apparently the roof – an emergency fabric job that they don’t recommend for use above 100mph – sits above these air inlets. With it in place, I wouldn’t be surprised if the W16 ingested receipts and jelly babies from the cabin as it gulped air on full throttle.

The Mistral, having no roof, won’t do the 300mph-plus of the Super Sport, and given that Bugatti is now part of Bugatti Rimac, it no longer has access to VW’s Ehra-Lessien for its high-speed runs either – which is a bit confusing given that Porsche’s stake in Bugatti’s ownership structure still seems relatively Volkswagen-adjacent. But at Papenburg test track last year Bugatti's long-time test driver and Le Mans winner Andy Wallace took a Mistral to 282mph, as fast as an open-topped production car has gone. 

RIDE & HANDLING

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Our drive of the Mistral is on roads around Bugatti’s Molsheim factory: a stretch of dual carriageway, some villages and country roads on which, despite each Bugatti being extensively pre-delivery tested, seeing one still turns heads and makes children fall off their bicycles (I really hope you’re okay, young man).

The Mistral continues the Bugatti tradition of being a doddle to drive. 

This is my first drive of a roofless Bugatti, and any loss of rigidity – there must be a little – is barely noticeable. More noticeable than a roofless McLaren, perhaps, which all feel as rigid as the coupé. But here you’re searching to feel the slightest difference. This is an easy car to get in and out of, with conventional doors, low sills – it’s not like you’re surrounded by stiffening materials.

The ride is good. Reasonably firm, because you would want body movements well contained, but absorbent enough. There’s no option to change damper settings or steering weight, although some drive modes can change the car’s height and angle of attack should you want to do a high-speed run.

But given this car’s prodigious performance and 1977kg kerb weight, it is pleasing to find that it’s fun, as with a Chiron, to drive at moderate speeds on back roads. 

The medium-weighted steering's feel is good, plus it's accurate and linear and the car turns precisely and willingly.

MPG & RUNNING COSTS

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There's probably no more expensive modern car to run than a Bugatti. Parts, servicing, you name it, you'll pay for it.

If you're counting, the official fuel consumption is 13mpg but at full speed, if you could find a track long enough, it'd drain its fuel tank in eight minutes.

VERDICT

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Fittingly, the W16 Mistral's engine remains the megastar of this ensemble, whether you’re giving it the lot – briefly – on a dual carriageway and hoping your glasses don’t get sucked into the engine, or even if you’re surfing a wave of torque, choosing your preferred throttle opening to pick the sound you like the most.

I’d be surprised if this W16 engine has ever been more easily enjoyable than in a Mistral. And as we reach late-stage petrol internal combustion, I don’t suppose we’ll ever see its like again.

Matt Prior

Matt Prior
Title: Editor-at-large

Matt is Autocar’s lead features writer and presenter, is the main face of Autocar’s YouTube channel, presents the My Week In Cars podcast and has written his weekly column, Tester’s Notes, since 2013.

Matt is an automotive engineer who has been writing and talking about cars since 1997. He joined Autocar in 2005 as deputy road test editor, prior to which he was road test editor and world rally editor for Channel 4’s automotive website, 4Car. 

Into all things engineering and automotive from any era, Matt is as comfortable regularly contributing to sibling titles Move Electric and Classic & Sports Car as he is writing for Autocar. He has a racing licence, and some malfunctioning classic cars and motorbikes.