Hennessey Venom GT Spyder world’s fastest convertible (2016) photosby Joshua ThompsonThe Hennessey Venom GT Spyder and its 1451hp (1082kW) 7-liter twin-turbo V8 has become the world’s fastest convertible with a top speed of 265.6mph/427km/h. ◄ PrevNext ►Credit: Hennessey 2016 Hennessey Venom GT Spyder - Racelogic certification Tags:gthennesseyspydervenomworld record