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Bizzarrini Ersus. p. A. was an Italian automotive manufacturer inside the 1960s founded by ex- Alfa Romeo, Ferrari and ISO industrial engineer, Giotto Bizzarrini. The company built only a few highly developed and sophisticated sport and racing motor vehicles before failing in 1969. Notable models include the actual 5300 GT Strada along with the P538S.Originally Prototipi Bizzarrini s. r. l., the name was altered to Bizzarrini S. p. A. in 1966. The Bizzarrini marque has been revived with a number of concept cars in the 2000s.Giotto Bizzarrini was created in Livorno, Italy in 1926. His father was any rich landowner who originated in a family with robust roots in Tuscany plus the city of Livorno. His grandfather, also named Giotto Bizzarrini, was a biologist who had caused Guglielmo Marconi on his inventions, especially the radio, following which one in the Livorno Library sections has been named The Bizzarrini Library.Bizzarrini graduated as an engineer in the University of Pisa inside 1953. He taught briefly prior to joining Alfa Romeo with 1954. He worked for Alfa Romeo via 1954 to 1957. He began working for Ferrari in 1957, eventually becoming controller associated with experimental, Sports and GT auto development. He worked at Ferrari as a developer, designer, test driver, and chief engineer intended for five years. His developments there incorporated the Ferrari 250 TR, the Ferrari 250 GT SWB (Limited Wheelbase Berlinetta or Berlinetta Passo Corto), and the 1962 Ferrari 300 GTO.

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Bizzarrini seemed to be fired by Ferrari through the "palace revolt" of 1961. He became part connected with Automobili Turismo e Activity (ATS)), a company started with the ex-Ferrari engineers to make a Formula 1 single seater and also a GT sport car, the A. T. S. Serenissima.One of ATS's economic backers, Count Giovanni Volpi, owner of Scuderia Serenissima, hired Bizzarrini to enhance a Ferrari 250 GT SWB, with chassis number #2819GT in order to GTO specifications. This resulted in the actual Ferrari 250 GT SWB Drogo also called the "Breadvan".Bizzarrini's engineering company, Societa Autostar, was commissioned to pattern a V-12 engine to get a GT car to be built by another unhappy Ferrari customer, Ferruccio Lamborghini. Lamborghini considered the resulting engine for being too highly strung, and ordered that the item be detuned.

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Bizzarrini worked since 1964 regarding Iso Rivolta and developed three models: Iso Rivolta GT, Iso Grifo both A3L and A3C versions. His work was to produce a pressed steel figure chassis for Iso cars and trucks. Renzo Rivolta hired him as consultant on the Iso Gordon GT project which became the Iso Rivolta GT. The Iso Gordon GT prototype was made from the Gordon-Keeble. The Gordon Keeble GT has been designed in 1960 simply by Giugiaro. Bizzarrini tested the vehicle and was impressed through the powerful V8 Corvette engine and the rear De Dion tube used by the GT:'Rivolta had me test the prototype. I liked its De Dion pipe and especially the Corvette motor. It was the very first time I had driven just one. It was superior to Ferrari's engines, having the same power but using a more immediate throttle reply. 'The Iso Rivolta GT seemed to be a Giugiaro designed some seater with beautiful body, speed, comfort and handling, and was a successful car for ISO together with 799 units sold. Powered by a 327ci Chevrolet Corvette V8 engine using a classic De Dion raise suspension design with constrained steel monocoque bodywork over pressed steel frame chassis. Unveiled to the mass media in 1963, production continued until 1970.The Iso Grifo A3L has been a monstrous idea for a super coupé, the L coming by Lusso. The result of the particular brilliant Giugiaro and Bizzarrini operating together, it was based on the shortened Iso Rivolta GT chassis and was debuted for the 1963 Turin show. The Grifo epitomised the 1960s Italian style with its handsome low and broad handmade bodywork. It was the best production car tested simply by Autocar Magazine in 1966 which has a top speed of 160 mph (260 km/h). Later versions of the particular Grifo were powered by the big block Chevrolet Corvette 435 bhp (324 kW; 441 PS) serp. These 90 handbuilt units are distinguishable by the raised "pagoda style" scoop bonnet. Some of these Iso Grifo 7 Litri units were rebuilt later with even bigger engines.

The idea of Bizzarrini was to utilize 3AL cars for opposition. The competition versions with the Grifo were named Iso Grifo A3C, C for Competizione or Corsa. A new lightweight riveted aluminum body was designed along with built by Piero Drogo. It was an aggressively designed machine, oriented to endurance events. It uses normal ISO underpinnings though the engine was moved further back in the chassis frame compared to the Grifo A3L, protruding well into this driver's cabin, fitted with hot cameras and fed by some big Weber carburettors, giving more than 500 bhp (298 kW; 406 PS).

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Around 29 A3C sport cars were built beneath the ISO name. Five of these 30 cars were bodied in plastic/fiberglass by Piero Drogo with Carrozzeria Sports Cars throughout Modena. A3Cs were widely raced. Some cars entered your 1964 and 1965 Le Mans 24 hour, 1965 Nürburgring 1000 as well as 1965 Sebring. It achieved a The Mans class win in both years as well as a 9th overall in 1965 without factory support. A3Cs were one from the fastest cars on LeMans' Mulsanne Immediately in both years.

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