The Series III was produced in open and removable hardtop versions. On the hardtop version the top could be removed but no soft-top was provided as the area it would have been folded into was occupied by a small rear seat. Also, the 1,592 cc engine developed less power. To provide more room in the boot, twin fuel tanks in the rear wings were fitted. Quarter lights were fitted to the windows. Between 1963 and 1964 5863 were made.
The lower output engine option was dropped for the Series IV with convertible and hardtop versions sharing the 82 bhp engine with single Solex carburettor. A new rear styling was introduced with the fins largely removed. Automatic transmission with floor mounted control became an option but was not popular. From Autumn 1964 a new gearbox with synchromesh on first gear was adopted in line with its use in other Rootes cars. 12,406 were made.
The final version, Series V had a new five bearing 1,725 cc engine with twin Zenith-Stromberg semi-downdraught carburettors producing 93 bhp. There was no longer an automatic transmission option. 19,122 were made.
The car enjoyed relative success in competition, both in Europe and in North America, but the overall sentiment was that the Alpine lacked power. Successive increases in displacement and engine tuning improved the car tremendously, but Rootes executives were looking for something to transform the car, rather than an evolutionary development. They eventually found it in the (then) newly-introduced small-block V8 from Ford, and a subsequent collaboration with Carroll Shelby, Ken Miles, and other sports car racers in the US would result in creation of the Sunbeam Tiger.