The Porsche Type 12 was a capr built by Ferdinand Porsche in 1931.
Although there was no commission for the car he had already drafted. Porsche had his own criteria for how the vehicle should be designed, with an emphasis on affordability, efficiency, and practicality. These considerations led Porsche to abandon a traditional box-like body mounted on frame. In the interest of efficiency, the use of an aerodynamic body was key. The shape of his car would have to be both streamlined as well as rigid.