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. They were exhibited at the
Esposizione di Torino. By 1907 they also produced two six-cylinder models, one of which had the
flywheel mounted at the front of the crankshaft. The next year they sold 500 cars and introduced a new four cylinder 14/16 hp engine as the basis of their modern, compact car. By 1914 the range included twin, four and six cylinder cars - the biggest had an 11,536cc displacement. After
World War I production resumed with the pre-war models; the
14/16 HP using a 2.700cc side-valve engine and the '
25/30 HP using a 4,400cc six cylinder engine. In 1922 the highly sophisticated 30/40 Super Sports was launched, with a 4,400cc six cylinder engine, using twin overhead camshafts (
dohc) operating four valves per cylinder. The aluminium alloy cylinders had steel liners and aluminium pistons, plus dual carburettors and dual-ignition. The car was also equipped with front-wheel brakes and a V-shaped radiator. By the next year, the sporting range was marketed as
Tipo 23,
Tipo 24 and
Tipo 25. ==Racing==