Bugatti Tourbillon revealed as £3.2m, 276mph, V16 hyper-hybrid

That engine – the first of this format to power a road car since 1991's ultra-rare Cizeta-Moroder V16T – was engineered in collaboration with Cosworth following the decision not to hybridise the W16 or develop a pure-electric Bugatti model. 

CEO Mate Rimac said recently he sees “no reason” for Bugatti to go electric in the immediate future, given its low volumes and the low mileages of its cars. “We have developed a new V16 engine, and we want to use that engine for a while, and maybe some other engines,” he said, “and I can't see a reason why it would be impossible."

The Tourbillon’s 8.3-litre engine is massive, measuring around a metre end-to-end, but weighs just 252kg, thanks to liberal use of lightweight metals and composites. 

It produces 986bhp in its own right, which makes it one of the most potent combustion engines yet installed in a road-going car, but with a trio of Rimac-supplied electric motors – two on the front axle and one at the rear – supplying an extra 789bhp, the Tourbillon becomes comfortably the most powerful combustion car on the market. Only the likes of the pure-electric Rimac Nevera, Lotus Evija and Pininfarina Battista pack more power, and then only around 100bhp.

The priority for the EV motors is to boost throttle response and provide torque fill during gear changes, but the 25kWh battery that powers them is claimed to give an electric range of more than 37 miles. Unusually for a PHEV, the battery is equipped with 800V charging hardware for a 0-80% charge time of just 12 minutes. 

Bosses suggest the Tourbillon will be faster outright than the Chiron, which could top 261mph in standard form and was the first car to crack the 300mph barrier in 2019, with the aid of special tyres and bespoke aero kit. A preliminary top speed of 276mph has been quoted for the Tourbillon, but Rimac said: "Let's say this is not the maximum...".

Bugatti also aims to achieve a 0-62mph time of 2.0 seconds, and a sub-5.0sec 0-124mph time, which would make the Tourbillon one of the world's quickest-accelerating cars. 

Bodywork

The design, while heavily influenced by the uniquely colossal powertrain, remains true to the principles established by the Chiron and its Veyron successor.

The ‘C-line’ – a distinctive feature of the W16 cars, inspired by Bugatti’s early road cars – is carried over, for example. So are the trademark horseshoe front grille, central dividing line along the bonnet and roof, and two-tone paint.

But while the Tourbillon is immediately recognisable as a Chiron descendant, its silhouette is defined more obviously by the nature of its new powertrain and its targeted capabilities - most notably with a view to achieving a top speed of more than 250mph. 

"The ability to travel at more than 400 km/h requires every single surface, inlet and ridge to be finely honed to ensure it is not only aerodynamic but also beneficial to the car’s thermodynamics," says Bugatti, highlighting how the bodywork has been sculpted, not just to optimise airflow at high speeds, but to cool the colossal engine behind the cockpit.

This aero focus manifests in a number of distinctive new features, including a rear wing that remains 'submerged' even at top speed with no impact on its functionality, and a huge rear diffuser tunnel that extends right from the back of the cabin to the rear bumper - remaining largely invisible with the bodywork in place. 

Less functional but more obvious are the Tourbillon's dramatic, remote-opening dihedral doors, which "not only allow for easy entry into the vehicle but provide a dramatic sense of arrival". 

That said, though, designer Frank Heyl was keen to emphasise the relative subtlety of Bugatti's hypercars against their more dramatically styled rivals. "This car is elegant," he told Autocar.

"Elegance is about being remembered. It's not about shouting out 'look at me!'. It's why we even chose to not paint it a shout-out, look-at-me colour. It's almost understated for what it is. “

Interior

Key to maintaining the Tourbillon's 'timeless' appeal, Bugatti says, is its analogue appeal, cultivated by its highly visible internal mechanisms and heavy reliance on physical controls - technology that doesn't date as easily as today's touchscreen-based systems. 

While sibling brand Rimac majors on digital functionality and ultra-advanced electronic functionality, the more 'traditional' Bugatti brand will continue to celebrate the physical, mechanical elements of its cars - which is why the intricate workings of the Tourbillon's instrument cluster – designed and built by actual Swiss watchmakers – are on show.

Comprising more than 600 minuscule components, and using precious materials including titanium, sapphire and ruby, the gauge mechanisms weigh just 700g altogether and have been engineered to a tolerance of no more than 50 microns (0.05mm). 

The steering wheel is mounted to a fixed hub, with the spokes fixed to the back of the cluster, which means the gauges are always visible, regardless of the steering angle.

The inner workings of the controls on the centre console are all on display, too, and while there is a small touchscreen with Apple CarPlay functionality, it's hidden in the dashboard and only electronically deploys when "drivers request it". 

Christophe Piochon, Bugatti president said the interior design is an embodiment of the principles at the heart of the hypercar firm: "It is clear from looking at any of Ettore Bugatti’s creations that every component – even if it is never seen – is a work of art, and that was our intention with Tourbillon, too. 

"It is stunning in every detail, recognisably Bugatti and also a masterpiece of packaging and engineering.”

Engineering

Unusually, despite the move to a hybrid drivetrain, the Tourbillon actually weighs less than its pure-petrol predecessor, at 1995kg, largely as a result of its completely bespoke carbon shell, which has been engineered with heavy influence from 'top level' motorsport.

Use of 3D-printed components from US firm Czinger for the subframes maximises stiffness while keeping weight down, while new 3D-printed aluminium suspension assemblies are said to weigh just over half those of the Chiron. 

Shaving weight was crucial in light of the addition of a heavy traction battery and electrified front axle, but engineers say that it was just as important to preserve the Chiron's practicality credentials.

To which end, the Tourbillon's entire e-axle assembly is said to fit in the same space that was available in its predecessor, "adding more complexity without requiring more space". That allowed Bugatti to rework the front end to increase the size of the frunk, meaning owners can keep their bespoke Tourbillon luggage set in there. 

Heyy told Autocar that he worked closely with Bugatti's engineers to ensure that the Tourbillon did not become overtly defined by its lofty power figures and capabilities.