BYD's all-electric Yangwang U9 Xtreme hits 503.17 kmph in Abu Dhabi, setting a new production-car speed record and rewriting the limits of electric performance. BYD Yangwang U9 Xtreme 500 kmph speed run took place in a real-world road environment instead of a closed professional ground. China continues to lead the global automobile scene, with its BYD company producing the world's fastest running car - U9 Xtreme EV, which surpassed Bugatti Chiron's speed.