The Rover SD1 is both the code name and eventual production name given to a series of executive cars built by the Specialist Division, and finally the Austin Rover division of British Leyland from 1976 until 1986, when it was replaced by the Rover 800. The SD1 was marketed under various names. In 1977 it won the European Car of the Year title.

Executive car is a British term for a large car which is equivalent to the European E-segment and American full-size classifications. Executive cars are larger than compact executive cars, and smaller than luxury saloons / full-size luxury sedans.