[4] In the same year, the 1900 TI with a more powerful 100 hp (74 kW) engine was introduced; it had bigger valves, a higher compression ratio, and was equipped with a double carburetor.

The 1900 had independent front suspension (double wishbones, coil springs and hydraulic telescopic shock absorbers) and live rear axle.

Production at the company's Milan plant continued until 1959: a total of 21,304 were built, including 17,390 of the saloons.

Iginio Alessio, then general manager of Alfa Romeo, was concerned for the viability of the independent Italian Coachbuilding industry–the advent of the unibody chassis design was threatening to put the carrozzerie out of business.

Alessio was also a personal friend of Gaetano Ponzoni co-owner of Carrozzeria Touring Superleggera,[6] thus from 1951 to 1958 Alfa Romeo built five different variations of the 1900 unibody chassis specifically for independent coachbuilders.

[8] One-off specials were numerous, from the famous Bertone BAT series of aerodynamic studies, to an infamous sci-fi like Astral spider designed by Carrozzeria Boneschi for Rafael Trujillo the dictator of the Dominican Republic.

[32] Between March 1960 and February 1962 Industrias Kaiser Argentina produced a car named IKA Bergantín [es].