The Bugatti Veyron 16.4 (known as the EB 16/4 Veyron in concept stages) is the most powerful, most expensive, and fastest street-legal production car in the world, with a proven top speed of over 400 km/h (407km/h or 253mph). It reached full production in September 2005. The car is built by Volkswagen AG subsidiary Bugatti Automobiles SAS and is sold under the legendary Bugatti marque. It is named after racing driver Pierre Veyron, who won the 24 hours of Le Mans in 1939 while racing for the original Bugatti firm.
Get to know more about Bugatti Veyron:
Buggati-Cars (Official Site)
How the Buggati Veyron Works