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
Lincoln-Zephyr V12 engine for 1942. Yet this V-12 never shed its reputation for service troubles, though the postwar versions were actually quite reliable. The V12 was eventually replaced by the InVincible 8, simply a version of the flathead V8 found on Ford's truck line. The Zephyr V12 was also used by Allard, Atalanta, and Brough Superior in England. Allard made three V12 cars, using the Ford V8 for all other cars at that time, Brough also made only one V12 as his others were Hudson 6 or 8 powered, and Jensen made one called the HL. The first Lincoln-Zephyr models of 1936 used