Claimed max power: 1,287bhp
In a world where fantasy often overtakes reality, the Ultimate Aero from Shelby SuperCars has got something the others don't: a Guinness World Records timing of 255.83mph, comfortably quicker than Bugatti's 253.2mph Veyron 16.4. SSC reckons its twin-turbo V8-engined 1,287bhp monster could go faster still - up to 273mph.