Well, for many years, to cross the mythical 300 mph is the dream and ambitious for many cars and drives. But this time people have witness this thing. Bugatti Chiron breaks the 300 mph barrier. So,the company has released the video, when Le Mans winner and Bugatti test driver, reaching a top speed of 304.773 mph (490.484 km/h).  Besides that, it has been done on the VW-owned test track at Ehra-Lessien in the German state of Lower Saxony.  On the other hand, it is the end of earlier Bugatti dream of 300 mph. Now, it is time to focus on the new dream and millstones to achieve. “With this new world record,” the automaker says, “Bugatti will also withdraw from the competition to produce the fastest serial production cars.