The G4 used the new Ford 105E engine and had a glass fibre GT style body and the suspension was updated to coil springing at the front with Ford live axle at the rear. Whereas the G2 and G3 had been designed for competition the G4 was usable as an everyday car but still was very competitive in motor sport with numerous successes. Over 500 were made up to 1969 with a variety of Ford engines. In 1963 a coupé was introduced alongside the open car and a BMC axle replaced the Ford one at the rear. On test the car reached 120 mph (190 km/h) with a 1500 cc engine. The series III version of 1966 added the then-popular pop-up headlights. Production stopped in 1968 but was revived in 1981 with the Series IV which was two inches wider and three inches (76 mm) longer than the III. The G10 and G11 from 1964 were higher-powered versions with 4.7-litre Ford V8 and MGB engines respectively. The G12 was a mid-engined competition car.
