In contrast to his rival Enzo Ferrari, Ferruccio Lamborghini had decided early on that there would be no factory-supported racing of Lamborghinis, viewing motorsport as too expensive and too draining on company resources. This was unusual for the time, as many sports car manufacturers sought to demonstrate the speed, reliability, and technical superiority through motorsport participation. Enzo Ferrari in particular was known for considering his road car business mostly a source of funding for his participation in motor racing. Ferruccio's policy led to tensions between him and his engineers, many of whom were racing enthusiasts; some had previously worked at Ferrari. When Dallara, Stanzani, and Wallace began dedicating their spare time to the development of the P400 prototype, they designed it to be a road car with racing potential, one that could win on the track and also be driven on the road by enthusiasts. When Ferruccio discovered the project, he allowed them to go ahead, seeing it as a potential marketing device for the company, while insisting that it would not be raced. The P400 went on to become the Miura. The closest the company came to building a true race car under Lamborghini's supervision were a few highly modified prototypes, including those built by factory test driver Bob Wallace, such as the Miura SV-based "Jota" and the Jarama S-based "Bob Wallace Special".