The Pobjoy R is a British seven-cylinder air-cooled radial aircraft engine designed and built by Pobjoy Airmotors.

[1] Introduced in 1926, it was a popular engine for ultralight and small aircraft in the 1930s.

A notable feature of the Pobjoy R was the propeller reduction gear which allowed the small engine to operate at more desirable higher speeds.

[2] A preserved Pobjoy R engine is on display at the Shuttleworth Collection, Old Warden, Bedfordshire.

[citation needed] Two Pobjoy R engines, one installed in the remains of Comper Swift (R222 / LV-FBA) will be soon on display at the National Aviation Museum in Buenos Aires Province, Argentina.