BYD’s Yangwang U9 Xtreme hits 308MPH, now the world’s fastest production car September 23, 2025 640 × 360 BYD’s Yangwang U9 Xtreme hits 308MPH, now the world’s fastest production car BYD’s Yangwang U9 Xtreme hits 308MPH, now the world’s fastest production car BYD’s Yangwang U9 Xtreme hits 308MPH, now the world’s fastest production car