The Reliant Rebel was launched with a 598cc engine which was increased to 701cc in time for the October 1967 London Motor Show and at the 1972 Motor Show to 748cc (although sometimes later 848cc Reliant engines are retro-fitted) and the maximum speed was around 70 mph (110 km/h). The chassis was similar to that of the three-wheeled Reliant Regal, but the Rebel featured a conventional four wheel configuration which involved a significantly larger section to its rails and conventional steering. In the Rebel's case this used the steering box from a Standard Ten with wishbones, trunnions and ball-joints from the Triumph GT6 / Vitesse. The standard 12" steel wheels had a PCD of 4x4" (4x101.6mm). The car was introduced with a four-speed gearbox which featured synchromesh on the top three ratios. By 1972 synchromesh had been extended to all four forward speeds. The light-weight body material and the aluminum engine block meant that the car was some 15% lighter than the (slightly shorter) Mini and 35% lighter than the early Renault 5 introduced in 1972.