“Bugatti Veyron Super Sport is the fastest production car ever built, and this is not what just because the ones that built the supercar say it, but because Guiness Book of World Records say it.
The Guiness Book officials were the first outside VW Group to see the new Bugatti Veyron at work. And really saw something extraordinary, because this new hypercar set a new speed world record for production cars and the Volkswagen’s testing circuit, Ehra-Lessien, reaching 268 mph, or 434,211 km/h. The Germans were very confident about their latest creations and before showing it to the public they put it to such a test in order to have something to brag about.
This record was facilitated by the new power peaks Veyron Super Sport reaches, the horsepower plant with 16 cylinders developing 1,200 HP and 1106 lb-ft of torque. The 20% enhancement of the power was possible thanks to the changing of the 4 turbo units with some bigger ones and of the intercoolers.
This model was launched in August at Peeble Beach Concours, and the first 5 units called World Record Edition were already sold. We still don’t know at what price, because it was not yet disclosed." ( in MIBZ)