The Grinnall Specialist Cars Ltd. (Grinnall Cars) is an automobile and motorcycles maker founded by Mark Grinnall in United Kingdom. This company mainly produced three-wheelers. It is based in Bewdley, Worcestershire.

In the beginning, Grinnall Cars started to modify Triumph TR7 cars. By 1990 they produced 350 units of Grinnall TR8 based on Triumph TR8. In 1991 Grinnall started to produce three-wheelers (also known as Trikes). In 1992 they started Scorpion III development. In 1998 started Scorpion IV development.