The Land Rover Series I, Series II, Series IIA, and Series III (commonly referred to as Series Land Rovers, to distinguish them from later models) are off-road vehicles produced by the British manufacturer Rover Company. The Land Rover was the first mass-produced civilian four-wheel drive car with doors on it. Most series models feature leaf-sprung suspension with selectable two or four-wheel drive (4WD), however series I's produced between 1948 and mid-1951 had constant 4WD via a freewheel mechanism, and the Stage 1 V8 version of the series III featured permanent 4WD. All three models could be started with a front hand crank and had the option of front & rear power takeoffs for accessories.  The Series lineup was succeeded by the Land Rover Defender in 1983.