[3] Production models received the same 1221 cc OHV engine as the earlier 1200 TV Trasformabile/Spider, albeit somewhat more powerful, with 59 CV (43 kW).

[2] The first units built of the 1200 Cabriolet came without separate wind deflector windows in the doors and without side indicators in the front fenders, but those details were added after a few months of production.

[4] The 1200 was not fast enough to be considered a sports car, so Fiat decided to take a short cut to this market by using OSCA's existing twin cam engine design.

[1] The Maserati brothers could not raise the funds to start series production for their engine, which they wanted to sell to racing teams, and therefore asked Fiat for help.

This model, built in small numbers and sold by Pininfarina themselves, received a smaller windscreen as well as a shortened bootlid to accommodate the larger rear window.

Abarth built a very small series of roadsters, fitted with the OSCA twin-cam engine and Michelotti-designed, Allemano-built bodywork similar to that used for the company's larger 2200 Spider.

It received the 1481 cc pushrod engine from the 1500 saloon, delivering 72 CV (53 kW) (80 SAE), and the car also benefitted from front disc brakes.

This last edition can be distinguished by the round emblem with laurel wreath in the grille, as Fiat started using it from that year for its sporting models.

[9] OSCA themselves built a series of sporting passenger cars using this engine in their own tube frame chassis, fitted with bodywork from a variety of independent designers (mostly Zagato).