The Bugatti Chiron Super Sport 300+ is the most powerful car in the world, with a top speed of 304.773 mph (490.484 km/h). The car is based on the Bugatti Chiron, but has been extensively modified to achieve its incredible speed. These modifications include a more powerful engine, a more aerodynamic body, and a revised suspension. The Chiron Super Sport 300+ is a true engineering marvel, and it represents the pinnacle of automotive performance.