The 412-litre Bentley is one of the most iconic pre-war cars & the supercharged 412-litre ' Blower' Bentley is today one of the most sought-after & most valuable cars for collectors The ' Bentley Boys' won several high-profile races in Bentleys & Woolf Barnato & Bernard Rubin won with a 412-litre car in 1928 Five supercharged ' Blower' Bentleys were built to compete at Le Mans but the car's Achilles Heel was its reliability & it never won the 24-hour race This Manual provides details of the 412-litre unsupercharged & ' Blower' Bentley racing cars detailing their period racing history anatomy & engineering & providing an insight into owning maintaining & running an example of this iconic car today Illustrated with period photographs & design & engineering material plus photographs of restored examples in use today