High Quality Content by WIKIPEDIA articles! The Jensen FF was a four-wheel drive (4WD) Grand Tourer (GT) car produced by the British manufacturer Jensen Motors between 1966 and 1971. It was the first non all-terrain production car equipped with 4WD and an anti-lock braking system the Dunlop Maxaret mechanical system used hitherto only on aircraft, trucks, or racing cars. An experimental system was first fitted to a CV-8, but this did not go into production. The use of four-wheel drive preceded the successful Audi Quattro by many years. The letters FF stand for Ferguson Formula, after Ferguson Research Ltd., who invented the car's four- wheel drive system. This was the same Harry Ferguson who gave the world the Wee Grey Fergie Tractor. The FF was related to the similar-looking, rear-wheel drive, Jensen Interceptor, but is 127 mm (5.0 in) longer, and mechanically very different.