20. Yamaha OX99-11 (1992)©Yamaha
Usually thought of as a motorcycle maker, Yamaha has had a hand in many great engines, but the OX99-11 was the first time the company took on a whole car.
It was a bid to make the most of the company’s involvement in Formula One with its V12 engine. For the OX99-11, the 3.5-litre motor was detuned to 400bhp for road use.
Unfortunately for Yamaha, its supercar met a global recession head-on and nobody fancied a tandem-seater machine from a firm with no previous form in this area. Only three OX99-11 prototypes were built, though all survive and one sold for £1m in 2020.