The Fiat A.82 was an air cooled radial engine with 18 cylinders developed by the Italian engineering company Fiat and produced in small numbers during World War II.

It was used as the power plant for one operational aircraft, the Fiat BR.20bis bomber.

[1] It was the largest Italian engine design of the time.

[2] The A.82 was an 18-cylinder radial, consisting of two rows of nine cylinders arranged in a double star with a triple throw crankcase made of aluminium alloy.

[5] In addition to the fifteen Fiat BR.20bis operated by the Regia Aeronautica, Fiat also used the engine to power design studies like their BR.26 torpedo bomber.