Grinnall Specialist Cars was a British specialist sports car and motorcycle trike manufacturer founded by Mark Grinnall in the early 1990s. The company initially built around 350 modified Triumph TR8s before introducing its own reverse-trike model, the Scorpion III, in 1992. Designed by Steve Harper, the Scorpion III featured a tubular space-frame chassis, GRP bodywork, and a BMW K-series motorcycle engine mounted amidships, offering a…