Development of this vehicle began with the 1999 EB 18/4 "Veyron" concept car, which itself had a chassis based on that of the Bugatti 18/3 Chiron concept car. It was similar in design and appearance to the final Veyron production car. One major difference was the EB 18/4's use of a W18 engine with three banks of six cylinders. The Veyron's chief designer was Hartmut Warkuss, and the exterior was designed by Jozef Kabaň of Volkswagen, rather than Giorgetto Giugiaro of Italdesign, who had handled the three prior Bugatti concepts.