The Bugatti Veyron of its day. Long, low, sleek with a great big six under its hood, the XK120 was the fastest car you could buy at the time, with an incredible top speed of 120 mph.
Defines "supercar," then and now. It was V12-powered, ludicrously impractical, stupidly fast and impossible to see out of. It also pioneered Lamborghini doors.
