The SPA 6A is an Italian water-cooled inline six-cylinder aero engine of the World War I era.

[3] The SPA 6A was designed with steel cylinders arranged in pairs with a common welded water jacket.

The type made use of relatively advanced features such as aluminium pistons and a 6 degree overlap in valve timing.

[3] The engine was ordered into mass production by the Italian Military Aviation Technical Division to equip the Ansaldo SVA aircraft.

[2] In addition to production by SPA, the 6A engine was manufactured by Ansaldo, Breda, Talomona and Industrie Mecchaniche e Ferroviarie of Arezzo.