How many cylinders were in the engine of 885 hp, late 1930's Rolls-Royce?
Rolls-Royce Peregrine: The Rolls-Royce Peregrine was a 21 l , 885 hp liquid-cooled V-12 aero engine designed and built by the British manufacturer Rolls-Royce in the late 1930s. V12 engine: A V12 engine is a V engine with 12 cylinders mounted on the crankcase in two banks of six cylinders each, usually but not always at a 60° angle to each other, with all 12 pistons driving a common crankshaft.
12 cylinders