A daring Bizz-ness plan

RetroSeries 92 BIZZARRINI 5300 GT

W O R D S M I C H A E L S T A H L

1965

When ‘Mr V12’ embraced the small-block and forged out on his own

IF THE name Bizzarrini still sounds to you like a type of pizza or a fictional Italian supercar from Happy Days, you need educating real fast.

Giotto Bizzarrini was a renaissance man of the Italian supercar scene through the 1960s. Starting his career as a test driver with Alfa Romeo and then Ferrari, his list of credits spans design and development variously of engines, chassis and bodywork across cars like the Ferrari 250 GTO, the Lamborghini Miura and the Iso Rivolta.

As Ferrari’s chief experimental engineer in 1961, Bizzarrini was one of eight key figures who stood up against the meddling of Enzo Ferrari’s wife Laura and was forced to leave the company.

After a brief partnership with fellow ejectee Carlo Chiti, Bizzarrini went freelance. One of his first projects was the 1963 design of Lamborghini’s V12 engine, which would remain in production until 2010.

For all his excellence in designing V12 engines – not to mention the aerodynamics of the Ferrari 250 GTO and the maverick 250 GT ‘Breadvan’ – Bizzarrini turned to easy, reliable Chevrolet 327 small-block power when, in 1963, he designed a gran turismo under his own name, the Bizzarrini 5300 GT.

Its V8-powered, racing-inspired chassis drew on a lineage that could be traced through Grifo and Rivolta GT models. Bizzarrini-developed Grifo ‘A3/C’ competition coupes took class victories at Le Mans in 1964 and 1965, but a steady decline in the relationship with Iso boss, industrialist Renzo Rivolta, after 22 such cars were built led to Bizzarrini’s initiating production of the 5300 GT: in effect, an evolution of his Grifo A3/C.

Launched in 1965, the 5300 used a development of the Grifo’s steel monocoque chassis, but with the Corvette-derived V8 moved 400mm rearward (in comparison with the Grifo A3/L road car) to a true, front midengined location. The Bertone-styled bodywork stood just 1090mm high.

Reportedly between 115 and 133 Bizzarrini 5300 GT Stradas were built from 1965 to 1968, the majority of those having alloy bodies, but an unknown number being produced in steel. The most prized of all 5300 GTs are the sole targa and two Spyders produced.

Fast & factual05

1

Bizz as usual

Giotto Bizzarrini is, at the time of writing, alive and well.

He continues to work on his own sports cars, and recently celebrated his 91st birthday

2

General talks

A 1965 commission from Opel prompted Bizzarrini’s ‘mini 5300’, the four-cylinder 1900 GT Europa. GM sanitised it as the Opel GT.

3

Better berlinetta

Giotto Bizzarrini said this of the 5300 GT: “I started with the idea of the 250 GTO and set about trying to improve on it.”

4

Bull’s roar

The first Bizzarrini car and engine combo was the 1966 mid-engined P538 racer, with Lambo V12, made for Can-Am and Le Mans.

5

Radio one

Bizzarrini’s grandfather, also named Giotto, was a professor who worked on the early development of the radio.

In detail

Short changed

Giotto Bizzarrini’s fabricated monocoque chassis, version of that the Iso Rivolta shared its 2450mm the Iso hung a doublewishbone and de Dion suspensions, with coil body was a semimonocoque, riveted to the helping to keep down to 1252kg.

Bizzarrin steel monocoqu a shortened vers developed for th four-seater, shar wheelbase with Grifo. From it hu wishbone front rear suspension springs. The bod monocoque, rive chassis, all h weight

On the block

The Chevrolet Corvette-sourced 5359cc (327 cubic inch) smallblock V8 offered outputs of 272kW and 510Nm (in Strada spec), via a four-speed manual gearbox. Corsa racers swapped a single Holley for four Webers and gained 30kW. Rearward location is evident in the long plumbing to reach the radiator; the distributor is reached via the dashboard.

Loud and proud

The cockpit speaks volumes about the handcrafted, 1960s Italian supercar. Volume is also keyword in terms of the engine gearbox, and the noise it creates.

Heat was also an issue. It was all worth it for the brutal beauty of styling, and the reliable, hulking performance, with 0-100km/h in over six seconds and a top speed about 250km/h. the and s. ll f the g n just d of

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