Engine Family
W.O. Bentley Vintage Four
SOHC inline-4, 4 valves/cyl, fixed head3.0 L (2,996 cc); 4.5 L (4,398 cc)NA; Roots-supercharged (Blower)1921–193170–242 hp
Designed by W.O. Bentley. W.O. Bentley’s OHC 4-valve design. Variants: 3.0 L four (1921, Le Mans 1924/27); 4.5 L four (1927, Le Mans 1928); 4.5 L supercharged ‘Blower’ (1929, Amherst Villiers Roots blower at Tim Birkin’s instigation — W.O. disapproved). Road Blower ~175 hp, team cars ~242 hp.
