 It achieved a very high specific output, and surprisingly good specific fuel consumption (SFC).In 1945 the single-cylinder test-engine (Ricardo E65) produced the equivalent of 5,000 HP (192 BHP/Litre) when water injected, although the full V12 would probably have been initially type rated at circa .Sir Harry Ricardo, who specified the layout and design goals, felt that a reliable 4,000 HP military rating would be possible.