In the first half of the 1930s FIAT intensified the study of air-cooled radial engines, developing various new models. Presented in 1934, the A 70 showed a whole of various refined technical characteristics, not common in small and medium-sized engines of that time. The A 70 features compact size and high-level constructive quality, observable in very thin cooling fins over both cylinders and heads, and good mass-to-power ratio, also obtained thanks the supercharging system. Despite its excellent performance, improved in the more powerful A 70 S version in 1936, the engine gained no noticeable spread and its production was limited to a few units.
FIAT G. 5 bis, Breda 42, Cantieri Caproni Bergamasca PS. 1, Nardi FN 305 D etc.
