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How design follows function in the Bugatti Chiron Pur Sport and Super Sports 300+

As the successor to the world-beating Veyron, the Bugatti Chiron had big shoes to fill, and by every measure it has succeeded. With its 304-mph top-speed run last fall, the latest Bugatti hypercar has handily beaten all expectations, and Bugatti President Stephan Winkelmann has even publicly stated that the company will no longer chase speed records. One could argue that the Chiron's work here is done, and yet it's merely half way through its projected lifecycle. What more could it possibly accomplish? Bugatti's answer: Go faster on a road course. To accomplish this, the Chiron Super Sports 300+ formula would have to be cast aside for something entirely new. After all, the things that make a car fast in a straight line are only part of the equation when it comes to conquering a race track, and with that mission, the Chiron Pur Sport was born. These two models' diverging missions necessitated distinct design. To learn more about just how differently they were formed, Autoblog attended a virtual round-table with Frank Heyl, Bugatti deputy design director, and Jachin Schwalbe, Bugatti head of chassis development. The distinctions are most evident in their profiles, where the longtail design of the Super Sports 300+ radically alters the Chiron's entire rear "box," making the Pur Sport's sharp rear cut-off seem almost inelegant by comparison. The slow, clean taper of the longtail design accomplishes the same thing aerodynamically that it does aesthetically. When the car is in top-speed mode, the rear spoiler even remains stowed. This design significantly shrinks the low-pressure zone behind the car, reducing the resulting drag, but that absent spoiler also detracts from the Chiron's stability. To compensate for the lack of spoiler deployment, Bugatti's engineers altered the flow beneath the car and through the rear diffuser. Heyl describes this as "free" downforce, because there's no corresponding penalty in drag from gains found with these underbody features.   With the Pur Sport, Bugatti went the other direction. This track-focused car gives up a ton of top speed to its sibling in exchange for nimbleness and acceleration, so being able to cut the minimum hole in the air is far less important. Think of design as a zero-sum game, Bugatti's team says.

New images show Bugatti's 1,824-hp Bolide track car in real life

Bugatti introduced a one-off track car named Bolide in October 2020, but the images it sent us were computed-generated renderings. It released a batch of fresh photos that finally show the model in real life. In a normal year, there is a good chance we would have caught up with the latest addition to the Bugatti family tree at an auto show on either side of the pond. 2020 is different because all of the events we normally cover are canceled, so the images give us a much-welcomed second look at the Bolide. It's just as stunning in photos as it is in the computer-generated graphics, and the new gallery proves this track monster is not merely a figment of some designer's imagination. It exists, you can look at it and sit in it. Odds are you'll want to drive it, too. It's built around a quad-turbocharged, 8.0-liter W16 that's related to the engine that powers the Chiron and tuned to develop 1,824 horsepower when it's slurping 110-octane race fuel. While that's an impressive figure on its own, it's even more mind-boggling when you take into account the Bolide's 2,734-pound dry weight. It weighs about 166 pounds less than the new, second-generation 2022 Subaru BRZ yet it has eight times the power. Nils Sajonz, Bugatti's recently-appointed head of special projects, shed light on one of the Bolide's design themes. He explained the x-shaped lights on both ends are a reference to the tape that race car drivers used to put over their headlights to ensure the glass didn't spread on the tarmac if it broke. Racing is a significant part of the Bugatti heritage, cars like the Type 35 were hugely successful, and the Bolide is the newest torch bearer. Will it race? It's too early to tell. As of writing, it's a one-off model that hasn't been approved for production. Bugatti notes that simulation testing reveals the Bolide can lap the Nurburgring in 5:23:01, a figure that makes it nearly as fast as the record-holding Porsche 919 Hybrid, and it takes 3:07:01 to go around Le Mans. The firm is done chasing speed records, but we're hoping it gives the Bolide the chance to prove its mettle on the track.

Bugatti Bolide gets a 40-unit production run

At some point in the past couple of years, Bugatti asked itself, "What if we built a radically light vehicle around the legendary 8.0-liter W16 engine?" Keep in mind that "radically light" is in comparison to the Chiron, which weighs about 4,500 pounds. The luxury firm from Molsheim, France, answered its question with a concept it called the Bolide, a track-only two-seater with an appetite for aero and downforce. Scooped-out bodywork, intense massaging, and throwing luxuries out the wraparound canopy dropped its weight to 2,737 pounds. That's less than a Subaru BRZ for a car producing 1,824 horsepower on 110-octane race fuel. Bugatti called the Bolide a one-off, but guess what happens in a car market where someone throws $140,000 at a 1994 Toyota Land Cruiser? Potential buyers made Zoom calls to Molsheim from their bank vaults while sitting on pyramids of money like the Joker in "The Dark Knight." So now Bugatti is making 40 Bolides, the same number it made of its last track superstar, the Divo. CEO Stephan Winkelmann was at The Quail, A Motorsports Gathering to announce the production version. Bugatti said it is honing the Bolide's aerodynamics and handling, and adding FIA-standard safety systems. The center-lock wheels will see production, as will a fuel bladder and pressurized refueling, a six-point safety harness with HANS compatibility, and an automatic fire extinguishing system. There are prices to pay beyond MSRP for making dreams come true, though. The production vehicle gains some weight, coming in 460 pounds over the concept at 3,197 pounds. Changes to the engine tune mean horsepower takes a hit, too. The concept got its 1,824-hp puissance from 110 octane. The production W16 will drink far more accessible 98 RON gas, which is about 94 octane in the U.S., topping out at 1,577 hp and 1,180 pound-feet of torque. That drops the power-to-weight ratio from 0.67 to 0.49 — just behind the track-focused Koenigsegg Jesko at 0.51. Oh, the humanity. The company says Bolide development and production will take place over the next three years, the first example scheduled for delivery in 2024. The price: 4 million euros, or roughly $4.7 million U.S. at the moment, and a million euros less than the street-legal Divo. What's the French word for "bargain?"