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 speed record any such claims. Examples of the difficulties faced were shown up in the dispute between Bugatti and Hennessey over which car was the world's fastest. On 4 July 2010 the Bugatti Veyron Super Sport reached two-way average. Bugatti built 30 Super Sports (5 of them named World Record Edition). At the time the record was set it was known that the customer cars were electronically limited to . Guinness Book of Records (which had listed speeds by British cars with modified rev limiter as production car records in the 1990s) listed the unlimited as production car speed record. Yet, 3