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Repair common Windows errors and clear accumulated junk for a smoother, more stable PC - no reinstall needed.Free scan · no reinstallThe highest published speed figures among notable cars unveiled in 2024 belong to the Xiaomi SU7 Ultra and Bugatti Tourbillon—but their claims are not directly comparable. Xiaomi gave the SU7 Ultra a designed maximum of 350 km/h; Bugatti said the Tourbillon’s design accounts for travel above 400 km/h without stating a precise maximum. BYD published a 309.19 km/h top speed for the YANGWANG U9. These are manufacturer claims, not results from a common independent test, and this is a qualified shortlist rather than a complete global ranking.
How the 2024 speed claims compare
The figures below are best read by claim type, not as a strict fastest-to-slowest ranking. A design maximum, a stated top speed and a design consideration are different kinds of evidence; the cited announcements do not establish shared test conditions.
| Vehicle | 2024 reveal or launch | Category | Published speed information | What the figure means |
|---|---|---|---|---|
| Xiaomi SU7 Ultra | Unveiled October 29, 2024 | High-performance sedan | 350 km/h | Xiaomi’s stated designed maximum speed. Xiaomi announcement |
| Bugatti Tourbillon | Premiere June 20, 2024 | Hypercar | Above 400 km/h | Bugatti says travel above this speed informs the car’s aerodynamic design; the cited material does not provide a precise maximum-speed figure. Premiere details and Tourbillon description |
| YANGWANG U9 | Launched in 2024 | Electric supercar | 309.19 km/h | BYD’s stated top-speed figure for the U9. BYD launch announcement |
What each number does—and does not—tell you
Xiaomi SU7 Ultra: a designed maximum of 350 km/h
Xiaomi unveiled the SU7 Ultra on October 29, 2024, describing it as a high-performance sedan with a designed top speed of 350 km/h. The same announcement states maximum output of 1,548 PS and acceleration from 0 to 100 km/h in 1.98 seconds. Those are Xiaomi’s published specifications, not evidence of an independently verified top-speed run. Xiaomi said the car’s official release was scheduled for March 2025. Xiaomi’s announcement
Bugatti Tourbillon: above 400 km/h as a design consideration
Bugatti premiered the Tourbillon at Molsheim on June 20, 2024. The company says that traveling above 400 km/h is a consideration in the car’s aerodynamic design. That wording gives useful context for the vehicle’s intended high-speed capability, but it is not a precise maximum-speed specification: the cited Bugatti pages do not state an exact top speed. Bugatti premiere retrospective · Bugatti Tourbillon description
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YANGWANG U9: BYD’s stated 309.19 km/h
BYD’s 2024 launch announcement gives the electric YANGWANG U9 a top speed of 309.19 km/h. It is a specific manufacturer-published figure, but the cited release does not establish a standardized independent comparison with the Xiaomi or Bugatti claims. BYD’s U9 launch release
Why the Venom F5 is useful context, but not a 2024 unveiling
Hennessey’s Venom F5 is relevant when distinguishing an aspiration or simulation from a measured top-speed result, but it was not a new car unveiled in 2024. In a February 2024 release, Hennessey described a goal of exceeding 300 mph in two directions and said the car had a simulated theoretical top speed of 328 mph. Founder and CEO John Hennessey said, “Our hypercar has a simulated theoretical top speed of 328mph, but we’re certainly not chasing that number.” The company’s wording identifies the 328 mph figure as a simulation, not an achieved run. Hennessey’s February 2024 release
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In July, Hennessey reported standing-half-mile runs of 219.07 mph by John Hennessey and 221.92 mph by test driver David Donohue. These are speeds recorded in a distance-based test, not the Venom F5’s top speed and not proof of a 300-plus-mph run. Hennessey described a push toward the car’s +300 mph V-max as a future effort. Hennessey’s July 2024 test update
Independent reader supportYour contribution helps us test, update, and keep practical guides available for everyone.Is one of these the fastest car in the world?
This shortlist cannot establish a current world-record holder. The included figures come from different manufacturer announcements and have different meanings; they are not a controlled head-to-head test or a verified record comparison. It also is not an exhaustive inventory of every vehicle unveiled worldwide in 2024. The clearest answer is narrower: among these notable 2024 unveilings, Xiaomi published a 350 km/h designed maximum for the SU7 Ultra, Bugatti described the Tourbillon as designed with travel above 400 km/h in mind but gave no exact maximum in the cited material, and BYD stated 309.19 km/h for the YANGWANG U9.
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