The MGB was introduced in May of 1962 as a replacement for the MGA. It was available as a four-cylinder roadster; a coupe with 2+2 seating was added in 1965. The MGB had a relatively modern design at the time of its introduction utilizing a monocoque structure in place of the traditional 'body-on-frame' construction method used on both the MGA and MGT Types. The monocoque structure was lightweight yet rigid and its helped reduce manufacturing costs. (The newcomer turned the scales at 2,028lbs). Wind-up windows were standard and a comfortable driver's compartment offered plenty of legroom. Zero-to-sixty mph was achieved in just over 11 seconds.
The suspension was by wishbones and coil springs at the front, and a live axle mounted on leaf springs at the rear. Damping was by lever arm units all round. Braking was by discs at the front and drums at the rear. The 1,798cc version of the BMC B-series engine offered nearly 100 horsepower.
The MKII model was introduced in 1967 and brought with it an updated manual gearbox with revised ratios and synchromesh on all gears, as well as the option of a Borg-Warner automatic unit. Other changes included a revised rear axle and a switch from dynamos to alternators. In 1969, Rostyle wheels replaced the previous pressed steel version for standard fit. With the MKIII derivative of 1972 came a new facia and improved heater. Two years later, steel-reinforced rubber bumpers replaced the chrome ones and the ride height was raised by one inch.
The most potent version of the MGB was the V8 GT, which was first introduced in 1973. Power was from a 3528cc Rover V8 engine offering 137 horsepower. 0-60 mph took around 8 seconds and it had a top speed of 125 mph. The all-alloy engine was lighter than the cast iron unit of the standard MGB. Production of the V8 was curtailed in 1976 (reputedly over BLMC's concern it would limit sales of the less powerful Triumph Stag) after just 2,591 had been built.
By the time Roadster production came to a close in 1980, a total of 399,070 examples are said to have been produced.
by Dan Vaughan