1913 Hillman – Hillman Owners Club . The first production Hillmans were large-engined vehicles, with a choice of 40hp, 6.4-litre four-cylinder, or 60hp, 9.7-litre six. However, the volume seller was a 1.4-litre, 9hp RAC (16bhp) model that received upgrades to 1.6-litre capacity by 1925.