The Milanese coachbuilder Carrozzeria Colli was established by Giuseppe Colli in 1931 and included his four sons, Mario, Candido, Beniamino and Tarcisio.
The company was specialized in using aluminium its works. The fist automobiles it made were racing cars using Fiat 1100

Fiat 1100

The Fiat 1100 is a compact automobile produced from 1937 to 1969, by the Italian car maker Fiat.- Fiat 508C Nuova Balilla 1100 :The Fiat 1100 was first introduced in 1937 as an updated version of the 508 "Balilla" with a look similar to the 1936 Fiat 500 "Topolino" and the larger 1500, with the...

 mechanicals and chassis,
also Fiat 500, Lancia Astura and Aprilia were used as basis. During the war the company worked for airforces and after the wars made car bodies. After the war they made couple of Alfa Romeo 6C 2500SS

Alfa Romeo 6C

The Alfa Romeo 6C name was used on road, race and sports cars made between 1925–1954 by Alfa Romeo. 6C refers to a straight 6 engine. Bodies for these cars were made by coachbuilders such as James Young, Zagato, Touring, Castagna, and Pininfarina...

, Lancia Aprilia

Lancia Aprilia

Lancia Aprilia is automobile manufactured by Lancia, one of the first designed using wind tunnel in collaboration with Battista Farina and Politecnico di Torino, achieving a record low drag coefficient of 0.47....

 based cars and for the
1947 Villa d'Este

Concorso d'Eleganza Villa d'Este

Concorso d'Eleganza Villa d'Este is a renowned elegance competition for classic and vintage cars. It has taken place every year since 1929 during the last weekend of April in Villa d'Este on the shores of Lake Como, Italy...

 a Fiat 500

Fiat 500

The Fiat 500 is a car produced by the Fiat company of Italy between 1957 and 1975, with limited production of the Fiat 500 K estate continuing until 1977. The car was designed by Dante Giacosa....

 barchetta. Colli made one very special protype in 1946, the Aerauto PL.5C

Aerauto PL.5C

The Aerauto PL.5C was a roadable aircraft developed in Italy in the early 1950s. It was a high-wing two-seat monoplane whose wings could be folded to quickly transform it into an automobile. It was different from many such projects in that it used its pusher propeller for propulsion not only in...

 roadable aircraft. From 1950s it made work with Alfa Romeo making cars such as 6C 3000CM

Alfa Romeo 6C

The Alfa Romeo 6C name was used on road, race and sports cars made between 1925–1954 by Alfa Romeo. 6C refers to a straight 6 engine. Bodies for these cars were made by coachbuilders such as James Young, Zagato, Touring, Castagna, and Pininfarina...

 and own single variant of Disco Volante

Alfa Romeo Disco Volante

The Alfa Romeo Disco Volante known also as 1900 C52, is a concept car series with production starting from 1952. The cars were racing car concepts with mechanics from the Alfa Romeo 1900 and made in collaboration with Milan based coachbuilder Touring. The engine was a slightly tuned 1900 engine ...

. The company built also Giulietta

Alfa Romeo Giulietta

The Alfa Romeo Giulietta was a subcompact automobile manufactured by the Italian car maker Alfa Romeo from 1954 to 1965. The Giulietta was introduced at the Turin Motor Show in 1954 and almost 132,000 were built in the Portello factory in Milan.The first Giulietta model was a coupé, the Giulietta...

 and Giulia

Alfa Romeo Giulia

The Alfa Romeo Giulia is an Alfa Romeo automobile. Alfa was one of the first manufacturers to put a powerful engine in a light-weight car for mainstream production. The Giulia weighed about . The car was equipped with a light alloy twin overhead camshaft four-cylinder engine, similar to that of...

 estate cars in the 1960s.
In 1955 Colli constructed the very shortly used Arzani-Volpini

Arzani-Volpini

Arzani-Volpini was an Italian Formula One constructor, established by Gianpaolo Volpini and engine-builder Egidio Arzani....

Formula One car utilising a twin-supercharged Maserati 1500 inline-four engine.
Colli made car bodies until 1973.