Bugatti Veyron Supersport (268mph)

Bugatti Veyron Supersport is officially the fastest road-legal car in the world, with a top speed of 431.07 km/h (267.85 mph). The original version has a top speed of 408.00 km/h (253.52 mph).

Powered by a development of the 8.0-litre quad-turbo V16, the Super Sport boasts 1183bhp and 1106lb ft of torque – gains of 183bhp and 184lb ft over the 253mph standard car. This has been achieved through the use of bigger turbos and larger intercoolers, while the suspension and bodywork have also been modified.