Sunbeam, now part of the Rootes organisation, first announced its Alpine sports model in 1959. The new model was a change of direction for Sunbeam, previous models were larger touring cars, this model was aimed at the younger MG/Triumph TR market. Throughout its production life the model was continuously developed and improved, production finally finished in 1968.
The Alpine III, produced from 1963 to 1964, gained further improvements and the addition of a hardtop model. Both the Roadster and GT (hardtop model) had a single Solex carburettor and revised suspension. Twin fuel tanks were added along with improved front seats, the GT also having a small rear seat. Other minor detail changes included a walnut dashboard and 1/4 lights in the front doors.