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
V12 engine the advantages of lower centers of gravity and improved pilot visibility for single-engined designs. Only the pre-war origin BMW VI V12 of Germany was an "upright" engine. The United States had the experimental Continental IV-1430 inverted V12 engine under development, with a higher power-to-weight ratio than any of the initial versions of the German WW II inverted V12s, but was never developed to production status, with only 23 examples of the Continental inverted V12 ever being built. The only American-design inverted V12 engine of any type to see even limited service in World War II was the air-cooled Ranger V-770,