Their basic business goal was to develop an automobile to compete in the popular Italian 1,100 cc racing class.

The 1,092 cc engine, which produced 55 PS (40 kW; 54 hp) at 6,000 rpm originally, had a in-house designed block, alloy head, and the bodywork was built as a two-seater, cycle-fendered roadster.

The 1954 12 Hours of Sebring was won by drivers Stirling Moss and Bill Lloyd in an OSCA MT4[5] as part of the Briggs Cunningham Team.

In 1955, a 1500 TN engined MT4 chassis with a streamliner body called the "Simpson Special" beat a number of records at the Bonneville Salt Flats.

Afterwards, the car was sold to Harry Allen Chapman, heir to the Mobil fortune, who went on to take a minor share of OSCA and also replaced Edgar Fronteras as the company's US distributor.

[9] OSCA also offered their own cars powered by the 1.6-liter derivative of Aurelio Lampredi's four-cylinder twin-cam engine, as installed in the Fiat 1600 S. These featured a tubular chassis with independent suspension at the front and rear.

[10] The Zagato cars (sometimes called 1600 GTZ) feature lightweight alloy coachwork with the company's signature "double-bubble" roof.

Designed by Ercole Spada, the car was constructed by Touring Superleggera and was built on a tubular frame chassis, with a DOHC Subaru boxer engine producing 187-horsepower.

[11][12] In 2022, the rights to the OSCA brand were passed by Alfieri Maserati to Massimo Di Risio, owner of DR Automobiles.