The Rover SD1 is both the code name and eventual production name given to a series of executive cars built by the Specialist Division (later the Jaguar-Rover-Triumph division) of British Leyland (BL), under the Rover marque. It was produced through its Specialist, Rover Triumph and Austin Rover divisions 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.

In "SD1", the "SD" refers to "Specialist Division" and "1" is the first car to come from the in-house design team.

The SD1 was the final Rover-badged vehicle to be produced at Solihull. Future Rover models would be built at the former British Motor Corporation factories at Longbridge and Cowley.