 The front doors are rear-hinged coach doors, sometimes termed "suicide doors", and the rear doors are front-hinged.Many design elements of the Tatra 87, V570 and the later T97, were copied by later car manufacturers.Ferdinand Porsche was heavily influenced by the Tatra 87 and T97 and the flat-four-cylinder engine in his design of the Volkswagen Beetle, and was subsequently sued by Tatra.