Top 10 Automotive Concepts of 2023 Published on December 24, 2023 in Top 10 by Louis-Philippe Dubé 8. Audi EP4 Concept Designed by twelve future automotive technicians and engineers trained by Audi, the EP4 concept is a modernized (and electrified) version of a classic car: the Prinz 4 (1961-1973). Powered by a 236 hp electric motor from a 2020 Audi e-tron, this wacky concept incorporates a host of modern technologies in a compact format.