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Bizzarrini Ersus. p. A. was an Italian automotive manufacturer inside 1960s founded by ex - Alfa Romeo, Ferrari and ISO professional, Giotto Bizzarrini. The company built a small number of highly developed and superior sport and racing motor vehicles before failing in 1969. Notable models include the actual 5300 GT Strada as well as the P538S.Originally Prototipi Bizzarrini ersus. r. l., the name was improved to Bizzarrini S. p. A. in 1966. The Bizzarrini marque has been revived with several concept cars in the 2000s.Giotto Bizzarrini was delivered in Livorno, Italy in 1926. His father was any rich landowner who came from a family with solid roots in Tuscany and also 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 of the Livorno Library sections has been named The Bizzarrini Catalogue.Bizzarrini graduated as an engineer from the University of Pisa throughout 1953. He taught briefly before joining Alfa Romeo with 1954. He worked for Alfa Romeo via 1954 to 1957. He began working for Ferrari in 1957, eventually becoming controller of experimental, Sports and GT vehicle development. He worked at Ferrari as being a developer, designer, test driver, and chief engineer pertaining to five years. His developments there incorporated the Ferrari 250 TR, the Ferrari 250 GT SWB (Small Wheelbase Berlinetta or Berlinetta Passo Corto), and the 1962 Ferrari 400 GTO.

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Bizzarrini seemed to be fired by Ferrari over the "palace revolt" of 1961. He became part regarding Automobili Turismo e Game (ATS)), a company started from the ex-Ferrari engineers to develop a Formula 1 single seater along with a GT sport car, the A. T. S. Serenissima.One of ATS's personal backers, Count Giovanni Volpi, owner of Scuderia Serenissima, hired Bizzarrini to upgrade 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 known as the "Breadvan".Bizzarrini's engineering company, Societa Autostar, was commissioned to design a V-12 engine for the GT car to become built by another not satisfied Ferrari customer, Ferruccio Lamborghini. Lamborghini considered the resulting engine to get too highly strung, and ordered that that be detuned.

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Bizzarrini worked since 1964 for Iso Rivolta and developed three models: Iso Rivolta GT, Iso Grifo both A3L and A3C versions. His work was in order to develop a pressed steel body chassis for Iso vehicles. Renzo Rivolta hired him as consultant towards Iso Gordon GT venture which became the Iso Rivolta GT. The Iso Gordon GT prototype was created from the Gordon-Keeble. The Gordon Keeble GT seemed to be designed in 1960 by means of Giugiaro. Bizzarrini tested the vehicle and was impressed with the powerful V8 Corvette engine plus the rear De Dion tube used for the GT:'Rivolta had me test the prototype. I liked its De Dion pipe and especially the Corvette serp. It was the first-time I had driven 1. It was superior for you to Ferrari's engines, having the same power but with a more immediate throttle result. 'The Iso Rivolta GT seemed to be a Giugiaro designed four seater with beautiful human body, speed, comfort and handling, and was a productive car for ISO with 799 units sold. Powered by a 327ci Chevrolet Corvette V8 engine with a classic De Dion rear suspension design with pressed steel monocoque bodywork around pressed steel frame chassis. Unveiled to the media in 1963, production continued until 1970.The Iso Grifo A3L was a monstrous idea for any super coupé, the L coming via Lusso. The result of this brilliant Giugiaro and Bizzarrini working together, it was based using a shortened Iso Rivolta GT framework and was debuted on the 1963 Turin show. The Grifo epitomised this 1960s Italian style featuring a handsome low and large handmade bodywork. It was the fastest production car tested by means of Autocar Magazine in 1966 which has a top speed of one hundred sixty mph (260 km/h). Later versions of the Grifo were powered with a big block Chevrolet Corvette 435 bhp (324 kW; 441 PS) motor. These 90 handbuilt units are distinguishable through the raised "pagoda style" deal bonnet. Some of these Iso Grifo 7 Litri devices were rebuilt later with even bigger engines.

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The thought of Bizzarrini was to utilize 3AL cars for competitors. The competition versions in the Grifo were named Iso Grifo A3C, C for Competizione or maybe Corsa. A new lightweight riveted alloy body was designed and built by Piero Drogo. It was an boldy designed machine, oriented to endurance races. It uses normal ISO underpinnings however the engine was moved further back in the chassis frame versus Grifo A3L, protruding well into the driver's cabin, fitted with hot cams and fed by a number of big Weber carburettors, giving more than 300 bhp (298 kW; 406 PS).

Close to 29 A3C sport cars were built under the ISO name. Five of these up to 29 cars were bodied throughout plastic/fiberglass by Piero Drogo with Carrozzeria Sports Cars within Modena. A3Cs were widely ran. Some cars entered your 1964 and 1965 Le Mans 24 hour, 1965 Nürburgring 1000 and 1965 Sebring. It achieved a The Mans class win in both years plus a 9th overall in 1965 without having factory support. A3Cs were one on the fastest cars on LeMans' Mulsanne Right in both years.

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