S.P.A. (Società Piemontese Automobili) was an Italian automobile, military vehicle and aero-engine manufacturer founded in Turin by Matteo Ceirano and Michele Ansaldi.

In 1923 it moved to Turin and in 1925 was taken over by Fiat, whereby car manufacture ceased but commercial and military vehicle production continued.

[1] In October 1898 Giovanni Battista and Matteo co-founded Ceirano GB & C and started producing the Welleyes motor car in 1899.

Giovanni Battista was employed by Fiat as the agent for Italy, but within a year he left to found Fratelli Ceirano & C. which in 1903 became Società Torinese Automobili Rapid (S.T.A.R.)

In 1906 Matteo left Itala to found S.P.A. (Società Piemontese Automobili) with chief designer, Alberto Ballacco.

Severe financial problems lead to a take-over by Fiat in 1925 and the discontinuation of car manufacture in favor of commercial and military vehicles.

The first S.P.A.s designed by Alberto Ballacco and Ceirano were the 28/40HP and 60/70 HP which had four cylinder engines, side valves and live rear axles.

[2] By 1911 they had introduced L-head monobloc engine designs, unitary gearboxes, and High tension magneto ignition systems.