The Rolls-Royce Condor aircraft piston engine was a larger version of the Rolls-Royce Eagle developing up to 675 horsepower (500 kW). The engine first ran in 1918 and a total of 327 engines were recorded as being built.
(1920-1921) 600 hp, 72 built at Derby.
Alternative designation for Condor II.
(1921) 650 hp, revised propeller reduction gear ratio, increased compression ratio (5.17:1). 34 built at Derby.
(1923-1927) 650/670 hp, compression ratio 6.5:1, Re-designed connecting rods. 196 built at Derby.
(1925) 650/665 hp. Improved main bearing design and material.