The company built a small number of highly developed and advanced sports and racing automobiles before failing in 1969.

One of ATS's financial backers, Count Giovanni Volpi, owner of Scuderia Serenissima, hired Bizzarrini to upgrade a Ferrari 250 GT SWB, with chassis number #2819GT to GTO specifications.

Bizzarrini tested the car and was impressed by the powerful V8 Corvette engine and the rear De Dion tube suspension used for the GT.

The result of Giugiaro and Bizzarrini working together, it was based on a shortened Iso Rivolta GT chassis and was debuted at the 1963 Turin show.

It uses normal Iso underpinnings but the engine was moved further back in the chassis frame than the Grifo A3L, protruding well into the driver's cabin, fitted with hot cams and fed by four big Weber carburetors, giving more than 400 bhp (298 kW; 406 PS).

The lowlight for Bizzarrini must certainly have been the Sebring 12 Hours on March 27, 1965, where both Iso/Bizzarrini race cars crashed causing serious damage, placing them beyond repair.

The highlight came later that same year at the 24 Hours of Le Mans on June 19–20, 1965 where an Iso Grifo/Bizzarrini won the 5000 cc and over class and was ninth overall.

C. Rino Argento helped Bizzarrini manage the race cars during that terrible week in June 1965 at Sebring.

He has written a detailed account of that week, which was originally published in the Griffon, the magazine of the Iso & Bizzarrini Owner's Club.

The famous California race car builder Max Balchowsky was also at Sebring helping the Bizzarrini team.

There was a morbid end to the week: a plane crash killed Iso and Bizzarrini supporter Mitch Michelmore and his son as they were on their way back to California.

Michelmore "had a Chevrolet dealership in Reseda, California and he had sold quite a few Iso Rivoltas; he was enthusiastic about the cars and interested in the racing version (the Grifos) and was seriously considering a sales activity for them in this country", according to C. Rino Argento.

This 1966 Bizzarrini GT 5300 Spyder S.I (Prototype) was one of the stars at the 1966 Geneva Motor Show, shown as a spyder/targa versions, all three still survive today and two currently owned by the same person.

Additionally, an open two-seat Spider featuring no weather protection was built in the 1990s using an unfinished AMX/3 modified chassis and the 7th AMX/3, on display at the Autoworld Museum in Belgium, were both finished by Giorgio Giordanengo.

Officially, three or four chassis were originally built in period, destined to race in the United States by Mike Gammino and Le Mans.

In 1990, Bizzarrini was involved in the design of a one-off supercar model based on Ferrari Testarossa chassis and running gear with a carbon fiber body.

In 1989 a group of young friends living in Ascoli Piceno, with a passion for motorsport, had the idea to establish a company constructing "copies" of the cars manufactured in the past by Giotto Bizzarrini.

During their first encounter, Bizzarrini expressed a kind of animosity towards this idea; he refused to support the project and he turned the group of friends out.

[citation needed] Nevertheless, their motivation was so strong that, after a short briefing of about half an hour, they presented an alternative proposal — to construct a sports car.

The Scuderia Bizzarrini built this sport barchetta in close collaboration with Leone Martellucci of University La Sapienza of Roma.

The car is powered by a parallel hybrid propulsion system with a 2.5 litre TurboDiesel Lancia engine and a 40 kW (54 hp) AC electric drive; it was shown at Turin Auto Show in 2000.

This two-door GT with a 4.1-litre 550 bhp (410 kW; 558 PS) plant, producing a maximum speed 360 km/h (220 mph), 0–100 km/h in 3.8 seconds, planned for production in 2007.

In 2008, the German designer, Stefan Schulze, proposed the Bizzarrini P358 Barchetta Prototype, a contemporary, ultra-light two-seater.

The reborn company announced plans to revive the marque with new models that acknowledge Giotto Bizzarrini's racing and design heritage.