Tweaked Bugatti Chiron Prototype Hits A Certified 304.77 MPH

It’s official: Bugatti has just broken the 300 mph (482 km/h) barrier with a Chiron prototype on Ehra-Lessien with none other than Andy Wallace behind the wheel.

The record run took place on August 2, with the hypercar achieving a top speed of 304.773 mph (490.484 km/h), which was verified by Germany’s TUV.

Bugatti was working in secret over the past six months with Michelin and Dallara to create a new version of the Chiron that could punch its way through the 300 mph barrier. By doing so, the hypercar maker beat Koenigsegg’s 284.55 mph (277.87 mph two-way average) it achieved with an Agera RS in 2017.

Also Read: Finally, We Get To See The Bugatti Chiron Sport Do A Top Speed Run!

Speaking to Top Gear, Bugatti President Stephan Winkelmann said that this will be the last record chased by the automaker, who will withdraw from the competition to produce the world’s fastest serial production car. “We have shown several times that we build the fastest cars in the world. In the future we will focus on other areas,” said Winkelmann.

The record-breaking Chiron is 25cm (9.84 inches) longer than the standard car, mostly thanks to a longer tail section that ditches the rear wing and airbrake to reduce drag. The new quad exhaust pipes also help, as do the bigger and deeper rear diffuser. The front end also get a larger splitter and a set of air outlets over the wheels.

“The biggest challenge is to get the overall package right, not only design, not only aerodynamics, not only engine, not only tires. It’s to get everything together and working in one car,” said Frank Heyl, Bugatti’s master of arts, head of exterior design.

Of course the quad-turbo 8.0-liter W16 engine was also upgraded, from 1479 HP (1500 PS) to 1578 HP (1600 PS), though the transmission and all-wheel drive were totally stock.

Bugatti describes the record-breaking Chiron as a “near-production prototype”, which could mean that the long-tail version is probably going to morph into the rumored Super Sport that could be unveiled in the coming weeks.


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  • Howfarr

    New: most beautiful car ever..

    • Aeromann

      Most ugly car ever, veyron is on the second place of awfulness.

  • HG504

    Impressive but it’s a prototype so Koenigsegg still has the chance to claim the out right 300mph production car record with the Jesko.

    • Shelby GT500

      Well, that can be a prototype of Chiron Super Sport. If they make a Chiron SS then it will be a record for a production car

  • David De Fortier

    What i find amazing, is how stable it looks at that speed!

  • Dredd2

    the biggest problem is the tyres…they can do/keep only 10-15mins at that speed.

    • Aeromann

      Yes that’s ridiculous.


  • Mr. EP9

    Not to be that guy but it’s a purpose built prototype whereas the Koenigsegg was an actual customer car. When a production Chiron actually does that give me a call. Also, didn’t Bugatti say there were not interested in top speed runs some time ago? If so, this clearly contradict that statement.

  • Six_Tymes

    wholly F!!!

  • Tumbi Mtika

    Jesko vs Chiron is the fight of the decade.

    First blood to Bugatti.

    And wow, the Chron looks miles better in this configuration.

  • john1168

    That’s awesome! Congrats to Bugatti! I hope this prototype goes into production so they can claim title of first production car to break 300 mph. Seems like it will see production.

  • donald seymour

    So is everybody forgetting about the SEC Tuatara ?

    • benT

      hopefully !

  • exeptor

    Not sure about the front, but the rest is how Chiron had to be in the first place. I do believe that at some point this will become an SS version.

  • Aeromann


    Koenigsegg had production tyres as well.

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