The Armstrong Siddeley Genet is a five-cylinder, air-cooled, radial engine for aircraft use built in the UK, first run in 1926.

It developed 80 hp at 2,200 rpm in its final form and was a popular light aircraft powerplant.

Following the company tradition with a slight deviation the engine was named after the Genet, a catlike animal of the same order but different family.

The Genet II produced 80 hp due to an increased compression ratio of 5.25:1.

Two preserved Armstrong Siddeley Genets are on static display at the Shuttleworth Collection, Old Warden, Bedfordshire.