Just a Fiat...
The Dino road cars came to be because of Enzo Ferrari's need to homologate a V6 engine for Formula 2 racing cars. In 1965 the Commission Sportive Internationale de la FIA had drawn up new rules, to be enacted for the 1967 season. F2 engines were required to have no more than six cylinders, and to be derived from a production engine, from a road car homologated in the GT class and produced in at least 500 examples within 12 months. Since a small manufacturer, like Ferrari was in the mid 60s, did not possess the production capacity to reach such quotas, an agreement was signed with Fiat and made public on 1 March 1965: Fiat would produce the 500 engines needed for the homologation, to be installed in a GT car which remained to be specified. — https://en.wikipedia.org/wiki/Fiat_Dino