Industry & technology / Yangwang
From 496.22 to 500km/h: the U9X challenge is bigger than the final 3.78km/h
No new Abu Dhabi result is verified; conditions, vehicle specification and measurement matter more than a round number.
Media-based report · see original reporting below
Key points
- From 496.22 to 500km/h: the U9X challenge is bigger than the final 3.78km/h
- No new Abu Dhabi result is verified; conditions, vehicle specification and measurement matter more than a round number.
- Editorial analysis — why the final 0.76% is not trivial. With air density, drag coefficient and frontal area fixed in a simplified model, aerodynamic drag rises with the square of air-relative speed; power needed to overcome that drag rises approximately with its cube. Moving from 496.22 to 500km/h therefore means about 1.5% more aerodynamic drag and 2.3% more aerodynamic power. This is an illustrative calculation, not a U9X measurement or proof that 2.3% more motor power guarantees success. Tyres, rolling resistance, drivetrain losses and road length are outside that calculation.
Reported details
Yangwang’s U9 Xtreme is preparing another speed attempt in Abu Dhabi. Its 500km/h target is only 3.78km/h, about 0.76%, above the earlier German test-track result. That narrow gap does not establish that another press of the accelerator will suffice: a target, sustained vehicle output and available acceleration and braking space are separate questions. At this November 5 update, the verified material establishes a plan, not a formally reported result above 500km/h from this attempt.
The chronology matters. BYD’s original announcement, published September 22, 2025, says Marc Basseng achieved 496.22km/h at ATP Papenburg on September 14 that year. IT Home reported on November 2, 2026 that Yangwang announced a renewed attempt on a road in Abu Dhabi; its November 4 report included it in overseas brand activities. The Dubai brand debut and Abu Dhabi speed venue are different locations. The material reviewed does not establish the precise road or time of the speed run.
Nor is this a test an ordinary U9 can simply reproduce through a software adjustment. BYD’s original U9 Xtreme description lists 1200V electrics, four motors capable of 30,000rpm, track-level semi-slick tyres and DiSus-X suspension tuned for circuit loads, with production limited to no more than 30 cars. Those manufacturer specifications do not disclose this attempt’s exact tyres, software or aerodynamic setup, and its speed cannot be assigned to other U9 versions.
Editorial interpretation
Editorial analysis — why the final 0.76% is not trivial. With air density, drag coefficient and frontal area fixed in a simplified model, aerodynamic drag rises with the square of air-relative speed; power needed to overcome that drag rises approximately with its cube. Moving from 496.22 to 500km/h therefore means about 1.5% more aerodynamic drag and 2.3% more aerodynamic power. This is an illustrative calculation, not a U9X measurement or proof that 2.3% more motor power guarantees success. Tyres, rolling resistance, drivetrain losses and road length are outside that calculation.
Editorial analysis — the road change matters. A track result demonstrates an achieved capability, not equivalent surface, gradient, wind or braking space on another road. Headwinds and tailwinds change air-relative speed, while air density also enters the drag equation. Without site measurements, Abu Dhabi cannot simply be labelled easier or harder. Reassessing how car and location work together is the engineering story worth following.
Editorial analysis — wait for the complete result. Any new number should be assessed alongside measurement equipment and calibration, one-way or return-run methodology, car and tyre specification, road and weather conditions, and responsibility for verification. “Road” must not be read as permission to test among normal traffic; organisers need to disclose controls and safety arrangements. Crossing 500 would be a striking milestone. Until then, the useful question is how the result will become explainable, checkable and comparable.
What it means
No new Abu Dhabi result is verified; conditions, vehicle specification and measurement matter more than a round number.
Original reporting and attribution
IT Home ↗沁沧
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