The once equally popular sporting cars produced by the Rootes group have somehow slipped from popular memory.Some will remember the Sunbeam Alpine, but few seem to recall the contemporary Sunbeam Rapier saloon or the fastback that succeeded it. The Hillman sporting models are even less remembered. The Hillman Avenger saloons became Group One Racing Champions and British Touring car champions. The humble Hillman Imp was part of their rally team and...