Riley 3-seater sports A new body styled on the Riley 2.5 litre 100hp 100mph chassis, this 3-seater has the irresistible appeal of a high grade sports touring car bred from a long line of ancestors. Part of its fame is an inherited record of successes in competitions and rallies. Engine, 4 cylinder OHM vemi-spherical head. Bore 80-5mm, stroke 120mm. Capacity 2433cc with remote control for gear change and entirely new body design