The Bugatti Veyron Super Sport reached a Guinness World Records-certified top speed of 431 km/h or 268 mph. However, as Guinness notes, the cars shipped to customers are restricted to 258 mph — to protect the tires, which don’t hold up well at the higher speeds. The Veyron Super Sport has four enlarged turbochargers and bigger intercoolers; the 16-cylinder engine has a total of 1,200 horsepower and 1,106 lb.-ft. of torque. It is the fastest road car in production. The SSC Ultimate Aero held the previous Guinness record of 255.83 mph. The Bugatti Veyron Super Sport, depending on production details and foreign-exchange rates, will cost between $2.4 to $2.6 million.