Auto Union Type 52 Concept, 2023 (1934), by Audi. The Auto Union Silver Arrows were legendary 1930s Grand Prix race cars. A street-legal sports car version with a 16-cylinder engine was also planned but the plan was never realised, until now. Audi commissioned Crosthwaite & Gardner to build the Auto Union Type 52 using surviving archive documents, plans, and design sketches. The mid-mounted supercharged 16 cylinder engine provides 520ps. #weirdcarmastodon