When I get home i will check my reference books but various European
manufacturers were using hemi headed engines for racing prior to the first world
war (before 1914).
Riley in the UK were mass producing (well they made over 50,000) hemi
headed engines from 1927 through to 1955.
As 4 cylinder, 6 cylinder and V8 engines, the six cylinder engine formed
the bassis of the engine used in ERA racing cars.
Regards
Nigel Plant
L*80 Locke Convertible Coupe
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