Which car is the world's fastest car?

SSC Ultimate Aero is 257 mph, with a 0-60 in 2.7 secs and a Twin-Turbo V8 Engine with 1183 hp, and the base price is $654,400. Tested in March 2007 by Guinness World Records, The SSC Ultimate Aero is now the fastest car in the world beating Bugatti Veyron.