Description The MG MGB was a British Sports Car released in May 1962 as a replacement for the MGA version. It continued in production until 1980. Originally introduced as a convertible 'roadster' version, a coupe with 2+2 seating was introduced in 1965. The MG MGB utilized a 1.8 litre engine with twin SU carburettors producing 95 bph. The US versions used a single Stromberg carburettor. The Mark II version of the MG MGB was introduced in 1967 with synchromesh gearbox.