What engineering change enables the U9 Extreme’s high claimed top speed?
The U9 Extreme uses a 1,200‑volt electrical architecture that allows much higher motor output (motors rated ~555 kW / ~744 hp each) and, combined with four motors, produces nearly 3,000 hp on the record run.
Is the 308.4 mph run officially verified as the production car record?
No — the attempt didn’t follow the usual two‑direction averaging verification and the car used specialized tires and suspension tuning, so the claim is disputed versus established records.
How does Yangwang relate to BYD?
Yangwang is BYD’s luxury subsidiary (positioned like Acura to Honda), using BYD’s E4 platform and leveraging BYD’s battery, electronics, and manufacturing resources.
Will a stock U9 likely reach 308 mph?
Unlikely: the base U9 is rated for about 186 mph, and the extreme run used higher‑voltage architecture and specialized setup; production models would face weight, tire, and regulatory limits.