The Fiat A.70 was an air cooled radial engine with seven cylinders developed by the Italian engineering company Fiat Aviazione in the 1930s. The engine powered a number of Italian light competition and prototype aircraft.
The A.70 was developed by Fiat Aviazione, part of Fiat S.p.A., as one of a number of related small radial engines. It debuted at the Challenge International de Tourisme 1934, powering a number of the competitors. The engine had seven cylinders of square design, with a bore and stroke of 115mm, arranged around a crankshaft in a single row. It was connected to the propeller by direct drive, often through a NACA cowling.