The MG Metro 6R4 (6 cylinder R rear engine 4 wheel drive) was a pure out and out competition car that retained a couple of panels from the original Metro body, but enough to clearly identify it as a Metro. It was built with the active assistance of Williams GP Engineering who at the time the project was started (1981) were at the pinnacle of F1 success and interestingly Austin Rover was a sponsor of Williams at this time