Encouraged by the success of the Austin Mini-Cooper, the British Motor Corporation (BMC) launched an even more potent model as an alternative in March 1963. The Austin Mini-Cooper S was developed with a view to motor sport. The engine with 1071 cc delivered an impressive output of 70 b.h.p. at 6200 r.p.m. and produced a performance that was characteristic of a sports car. Engineering innovations like the additional oil cooler, the second petrol tank on the right-hand side and the improved servo-assisted disc brakes were features of the Cooper S and highlighted its sportiness. The special nature of the new Mini-Cooper was only evident on the outside in the perforated wheels and the additional "S" above the type badges.