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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.

One and only Bugatti Chiron Profilee is headed to auction

Bugatti has shed light on a never-before-seen variant of the Chiron named Profilee. Designed with production in mind but ultimately canned, the coupe was envisioned as "a less radical interpretation" of the Pur Sport, and the only existing example is headed to auction in 2023. Customer requests shaped this otherwise fruitless evolution of the Chiron: Bugatti explains its clients asked for a toned-down version of the Pur Sport that focuses more on touring than on handling. Designers gave the coupe a new aerodynamic profile that's characterized by wider air dams and a bigger grille up front, a redesigned front splitter, and a relatively small rear wing with a hollow middle section. The wing's distinctive shape was chosen because it adds stability by providing the rear end with downforce while giving hot air a path out of the engine bay. Bugatti also made changes to the steering and suspension systems, and it gave the seven-speed, dual-clutch automatic transmission 15% shorter gear ratios. In turn, the Profilee stands proud as the fastest-accelerating member of the Chiron range: it takes 2.3 seconds to reach 62 mph from a stop. Keep your foot down and the speedometer will indicate 124 mph in 5.5 seconds, 186 mph in 12.4 seconds, and it will keep going until 236 mph. These numbers are provided by a mid-mounted 8.0-liter W16 engine quad-turbocharged to 1,500 horsepower. Bugatti Chiron Profil?e View 16 Photos Executives planned to cap Profilee production at 30 units but ended up canceling the project. "We started with the design and development of the Chiron Profilee in autumn 2020. By the time we saw the pre-series vehicle coming out of production, all Chiron slots limited to just 500 were assigned," explains Bugatti president Christophe Piochon.  Profilee production was never launched, but the only example built is fully street-legal in European markets. It's finished in a shade of silver called Argent Atlantique that was created specifically for it, and the bottom part of the car features bare carbon fiber that's tinted in Bleu Royal Carbon. Inside, the Profilee is the first Chiron fitted with woven leather on the dashboard, the center console and the door panels. Bugatti notes that completing the interior required using over 2,600 meters of leather strips. The cabin is fitted with a pair of comfort seats. RM Sotheby's will auction off the Chiron Profilee in Paris, France, on February 1, 2023.

This 1:4 scale Bugatti Chiron engine costs $10,000

Is $10,000 too much for a non-functioning powertrain? Amalgam, a company that specializes in high-end scale models of everything from cars to steering wheels has meticulously crafted a 1:4 scale replica of the 8.0-liter, 16-cylinder, 1,500-horsepower behemoth that powers the Bugatti Chiron. The model is so detailed that at first glance you'd swear it was the real thing, provided a banana isn't used for scale. According to Amalgam, this is the first model engine the company has built since the early 2000s. It worked closely with the engineers at Bugatti to make sure everything is exactly how it appears on the real car. Look close and you'll find all of the parts numbers, barcodes and hose clamps are exactly the same, just smaller. Like the real engine, this W16 features four scale turbochargers. All in, there was roughly 2,500 hours or more than three months of development time. Each model takes 220 hours to assemble, hence the $9,365 price tag. The engine is constructed mainly of pewter and stainless steel. The entire model is 18 inches long and 9 inches high. Pre-orders are open, though first deliveries aren't expected until January. Related Video: