Lamborghini V12 discontinued their first-generation V12 after the Murcielago, opting for a brand-new V12 that first saw use on the Lamborghini Aventador. When Ferruccio Lamborghini set out to compete with Ferrari, he contracted Giotto Bizzarrini to design the engine for his car and, according to some accounts, paid him a bonus for every horsepower over what Ferrari's V12 could produce. The finished V12, with minor improvements, went on to become the 6.5 litre powering the Lamborghini Murciélago LP 640, and completed its service for Lamborghini with the final version of the Murciélago, the Murciélago LP 670-4 SuperVeloce. The engine was designed from
Production car racing them in the class. These cars are commonly called "homologation specials". In British oval racing, the term "production car racing" has been used as an alternative for hot rods, as run in the West Country during the late 1960s to the mid-1970s, and a production car world championship race was held twice in the 1970s, won by Spence Morgan in 1974 and Ralph Sanders in 1975, both driving Ford Anglias. The West Country production cars were later reclassified as hot rods to come in line with the country's other promoters although this causes some confusion with the history of the