Rolls-Royce Peregrine

Peregrine
Type Piston V-12 aero engine
Manufacturer Rolls-Royce Limited
First run 1938
Major applications Westland Whirlwind
Number built 301
Developed from Rolls-Royce Kestrel
Developed into Rolls-Royce Vulture

The Rolls-Royce Peregrine was a 21-litre (1,300 cu in), 885-horsepower (660 kW) liquid-cooled V-12 aero engine designed and built by the British manufacturer Rolls-Royce in the late 1930s. It was essentially the ultimate development of the company's Kestrel engine, which had seen widespread use in military aircraft of the pre-war period.

Due to the wartime priority of Rolls-Royce Merlin development and production, the Peregrine saw limited use and was cancelled with only 301 engines being built.