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

Bizzarrini seemed to be fired by Ferrari in the "palace revolt" of 1961. He became part involving Automobili Turismo e Activity (ATS)), a company started from the ex-Ferrari engineers to produce a Formula 1 single seater as well as a GT sport car, the A. T. S. Serenissima.One of ATS's fiscal backers, Count Giovanni Volpi, owner of Scuderia Serenissima, hired Bizzarrini to improve a Ferrari 250 GT SWB, with chassis number #2819GT for you to GTO specifications. This resulted in the Ferrari 250 GT SWB Drogo also referred to as the "Breadvan".Bizzarrini's engineering company, Societa Autostar, was commissioned to design a V-12 engine for just a GT car to become built by another dissatisfied Ferrari customer, Ferruccio Lamborghini. Lamborghini considered the resulting engine to be too highly strung, and ordered that the item be detuned.

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Bizzarrini worked since 1964 intended for Iso Rivolta and formulated three models: Iso Rivolta GT, Iso Grifo both A3L and also A3C versions. His work was to produce a pressed steel body chassis for Iso cars and trucks. Renzo Rivolta hired him as consultant towards Iso Gordon GT task which became the Iso Rivolta GT. The Iso Gordon GT prototype got its start from the Gordon-Keeble. The Gordon Keeble GT ended up being designed in 1960 by simply Giugiaro. Bizzarrini tested the vehicle and was impressed through the powerful V8 Corvette engine as well as the rear De Dion tube for the GT:'Rivolta got me test the prototype. I liked its De Dion conduit and especially the Corvette powerplant. It was the new I had driven one. It was superior to be able to Ferrari's engines, having the same power but having a more immediate throttle response. 'The Iso Rivolta GT ended up being a Giugiaro designed several seater with beautiful entire body, speed, comfort and handling, and was a successful car for ISO with 799 units sold. Powered by a 327ci Chevrolet Corvette V8 engine using a classic De Dion backside suspension design with constrained steel monocoque bodywork above pressed steel frame framework. Unveiled to the media in 1963, production continued until 1970.The Iso Grifo A3L was a monstrous idea for just a super coupé, the L coming coming from Lusso. The result of the particular brilliant Giugiaro and Bizzarrini working together, it was based using a shortened Iso Rivolta GT chassis and was debuted in the 1963 Turin show. The Grifo epitomised the 1960s Italian style having its handsome low and extensive handmade bodywork. It was the most effective production car tested through Autocar Magazine in 1966 using a top speed of one hundred sixty mph (260 km/h). Later versions of the particular Grifo were powered by the big block Chevrolet Corvette 435 bhp (324 kW; 441 PS) powerplant. These 90 handbuilt units are distinguishable through the raised "pagoda style" scoop bonnet. Some of these Iso Grifo 7 Litri devices were rebuilt later with a great deal larger engines.

The idea of Bizzarrini was to operate the 3AL cars for opposition. The competition versions with the Grifo were named Iso Grifo A3C, C for Competizione or even Corsa. A new lightweight riveted aluminum body was designed as well as built by Piero Drogo. It was an strongly designed machine, oriented to endurance contests. It uses normal ISO underpinnings nevertheless the engine was moved further back the chassis frame compared to the Grifo A3L, protruding well into this driver's cabin, fitted with hot cams and fed by several big Weber carburettors, giving more than 600 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 throughout Modena. A3Cs were widely raced. Some cars entered the 1964 and 1965 Le Mans 24 hour, 1965 Nürburgring 1000 in addition to 1965 Sebring. It achieved a Le Mans class win in both years and also a 9th overall in 1965 without the need of factory support. A3Cs were one from the fastest cars on LeMans' Mulsanne Straight in both years.

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