Giotto Bizzarrini was an engineer at Renzo Rivolta, which was a refrigerator, motorcycle, and car manufacturer in the early sixties when the company began building supercars. He was the chief engineer on their Iso Rivolta, but a falling out with the company drove him to found his own company, Protipi Bizzarini SpA.
He didn’t exactly make a fresh start, though; he repackaged the Iso Grifo A3/C as the Bizzarrini GT Strada 5300. It can do 350 bhp, has a 5,359 cc OHV V-8 engine with a four-barrel carburettor, and a four-speed manual transmission. Sadly, Bizzarrini only built 133 of his cars before closing the business.