The Midget was made from 1961-80; The 1961-64 Mk I was essentially a slightly more expensive badge-engineered version of the Austin-Healey Sprite MKII. The engine was a 948 cc with twin SU carburettors producing 46 hp. In October 1962 the engine was increased to 1098 cc. Externally the main changes to the 1964-66 Mk II were to the doors, which gained wind-up windows, swivelling quarter lights, external handles and separate locks. The 1966 Mk III got the Cooper S 1275cc engine, although a slightly detuned version. There were minor facelift changes to the body in 1969, with the sills painted black and a revised recessed black grille. The square-shaped rear wheel arches became rounded in 1972.