Following his purchase of the Onyx Formula One team in 1992, Peter Monteverdi sought to take that technology onto the road in the form of the 650 F1 hypercar.
This high tech beast was based on an F1 monocoque chassis and powered by no less than an F1 650hp Cosworth V8 with screaming 11000 rpm redline. A staggering 766 bhp/ton power to weight ratio produced a claimed 208 mph top speed and McLaren F1 like acceleration of 0-125mph in around 8 seconds.
Orders were taken and two models produced (plus a third non runner). However, the 650 was not road legal, so customers never saw their cars as Monteverdi changed his mind and kept them all for promotional use!