And since you mentioned Bristol Centaurus.

[Linked Image]

On display in Old Warden hangers. Two rows of nine sleeve valve cylinders developing over 3000 hp from a total of 53.6 litres. Also used in the Hawker Tempest as well as Sea Fury.

A version built for the Bristol Beverley heavy transport plane developed 3,220 hp and must have represented the peak of aircraft piston engine development. This since the larger 67.9 litre Bristol Orion was never fully built although the name was later used for a turbo prop engine.