The Triumph Vitesse was a compact six-cylinder car built by Standard-Triumph from 1962 to 1971. The car was styled by Michelotti, and was available in saloon and convertible variants. The Vitesse name had previously been used by Triumph on a car made between 1936 and 1938.
After the last Triumph Vitesse was made in July 1971, the name remained unused until October 1982, when Rover used it on their SD1 until 1986, and one final time on their Rover 800, 820 and 827 models from October 1988 to 1991, at which time that car was rebodied as the R17 version, which was produced until 1998 as the Rover Vitesse Sport.
Source: Wikipedia, 2011