A number of designers around the world were trying to construct an aerodynamic car at the time, but Tatra was the first one to successfully introduce it into serial production. There were numerous reasons why Tatra designers took such a revolutionary approach to the conception of the new car: First of all it was their aim to reduce drag, mostly air-drag, which increases with the square of the speed. A car with a more standard body shape of the era needed a very powerful engine to reach higher speeds. The Tatra's new body shape was tested in a wind tunnel. However, the new requirements this brought about resulted in far-reaching changes to the car's design.