He worked at Lancia between 1929 and 1937 as a truck engineer, racing car driver, and later, advisor to Vincenzo Lancia. He was moderately successful as a driver by 1932, when, with Augusto Monaco, he created the Nardi-Monaco Chichibio.
Nardi himself also competed in Mille Miglia, sharing a Fiat 508 Balilla with J. McCain in 1935 and with M. Trivero in 1936, as well as a Lancia Augusta Berlina with Vittorio Mazzonis in 1937, and a Lancia Aprilia with P. U. Gobbato in 1938.
Working at Scuderia Ferrari from 1937 until 1946, Nardi became known for setting up the Fiat 508 (chassis for the 1940 Auto Avio Costruzioni 815), and doing the development work following Massimino's design; he also co-drove an 815 with owner Lotario Rangoni in the 1940 Mille Miglia.
- 750 Nardi
- Nardi-Danese 1500 sport.
- Alfa Romeo 6C 2500 variations
Nardi himself raced the monoposto (one-seater, or GP type), in Coppa d'Oro delle Dolomiti hillclimb, winning in 1947 and 1948). It was also entered by three drivers in the 1952 Targa Florio, but failed to finish.
Nardi & C. S.a.S.
His own workshop was established in Via Lancia (1951), focusing on prototypes and tuning equipment. Amongst the prototypes were:
- an F2 prototype developed with Gianni Lancia (1952).
- two Raggio Azzurro (Blue Ray) prototypes, designed by Michelotti and built by Vignale on 4th-series Lancia Aurelia's (B20 1955, B24 1958).
- the 4CV, a 750 cc Panhard-powered racer intended for Le Mans (1953), as well as the 750 LM Crosley (1950-54). A 750 Spider was presented at 37th Paris salon (1950), body by Pietro Frua.
- The Bisiluro Damolnar (bisiluro meaning twin torpedo) was built by Mario Damonte, Carlo Mollino, & Nardi, using a Gianni engine. It ran at Le Mans (1955) and is currently in the Leonardo Da Vinci Museum in Milano.
- Silver Ray, a Plymouth Golden Commando V8 350 bhp-engined Michelotti-bodied coupe for James Simpson (1960).
- single-seater on VW Beetle components, Formula Vee prototype, for Hubert Brundage (1959).
Ufficine Nardi ceased to work with car prototypes in the mid-50s and specialized in speed-enhancing parts such as manifolds, crankshafts, camshafts. It has become most known for the Nardi steering wheel, initially (in 1951) using walnut but mostly using African mahogany wood. The Nardi wheel was first fitted to a 1952 Pegaso.