Roger Dowson Engineering, also known as RD Motorsport, is an automotive engineering company, and an auto racing team run by . The company was founded in 1982, and was most notable for running the works MG Metros in the British Saloon Car Championship in 1983 (and running them until 1985, after Austin Rover had withdrawn their support) and the works Mazda teams in the British Touring Car Championship from 1992 until 1994.