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 L-head V12 engine V-8 in the KA-Series. Its 67° architecture was a significant departure, with four main bearings, offset blocks, and side-by-side connecting rods rather than fork-and-blade. It produced the same 125 hp specific output as the outgoing V-8 despite a somewhat smaller displacement of 381.7 cubic inches. The KA's 381.7 cubic inch V12 was enlarged for 1934 to replace the 1932-design 448. This new engine displaced 414 cu. in. (6.8 L) and produced 150 hp (112 kW). All Lincolns in 1934 (both KA and KB models) were powered by this new 414 V12, and the distinction between models was dropped, with all