The Volkswagen Beetle, officially the Volkswagen Type 1, or informally the Volkswagen Bug, is a two-door, four passenger, rear-engined economy car manufactured and marketed by German automaker Volkswagen from 1938 until 2003. The need for this kind of car, and its functional objectives, were formulated by Adolf Hitler, leader of Nazi Germany, wishing for a cheap, simple car to be mass-produced for the new road network of his country. He contracted Porsche in 1934 to design and build it to his exacting standards. Ferdinand Porsche and his team took until 1938 to finalise the design. This is one of the first rear-engined cars. With over 21 million manufactured in an air-cooled, rear-engined, rear-wheel drive configuration, the Beetle is the longest-running and most-manufactured car of a single design platform, worldwide. Although designed in the 1930s, the Beetle was only produced in significant numbers from 1945 on when the model was internally designated the Volkswagen Type 1, and marketed simply as the "Volkswagen".