The ill fated BMW M8

The vehicle is powered by a V12 engine from the McLaren F1 based around two six-cylinder engines from the M3 at the time producing around 550bhp. In the end it proved to be instantly reliable in tests of the 8-series. Although the M8 and its V12 engine were fully developed, the production was signed off in test vehicles, the car was never signed off by BMW management, despite M’s insistence.