The Navajo was the result of a collaborative effort between Alfa Romeo and legendary Italian design firm Studio Bertone. It had a fiberglass body and an innovative SPICA fuel injection system.

The original Alfa Romeo 33 Stradale program ended after roughly 18 chassis were made, ... five chassis were given to Bertone (for the Carabo and the Navajo), Pininfarina (for the P33 Roadster, ...