History of Lamborghini year. Ferruccio Lamborghini turned to Bertone designer Mario Marazzi, who had formerly worked at Touring. Together with Lamborghini's engineers, he created a four-seater named the Marzal. The car rode on a stretched Miura chassis, and it was powered by an in-line six-cylinder that was made from one-half of Lamborghini's V12 design. Despite an innovative design that featured gullwing doors and enormous glass windows, Lamborghini rejected the design. Eventually, a toned-down version became the Islero 400GT. While the car was not the full four-seater that he desired, Ferruccio Lamborghini thought the car represented a well-developed "gran turismo" product. It failed to
Production car speed record speed for both runs is taken as the car's top speed. In instances where the top speed has been determined by removing the limiter, the test met these requirements, and the car is sold with the limiter on then the limited speed is accepted as meeting this requirement. For the "McLaren F1" the estimation by "Car and Driver" about the speed at the rev-limiter is used. Comparing claimed speeds of the fastest production cars in the world, especially in historical cases, is difficult as there is no standardized method for determining the top speed and no central authority to verify