The Guiberson A-1020 is a four-stroke diesel radial engine developed for use in aircraft and tanks.

Development of the Guiberson diesel engine started in the 1930s with the A-918 and A-980 which was first flown in 1931.

It is a single-row direct drive nine-cylinder four-cycle engine.

[2] Production A-1020s and T-1020s were designed and sold by Guiberson and produced by Buda Engine Co.[2][3] Data from Aircraft Diesels: Chapter 3 - The Guiberson Diesel[2][5]