The Audi Tradition exhibit at this year’s Techno Classica in Essen centers around rarities from the company’s history. The world’s biggest classic car exhibition expects around 190,000 visitors from April 6 to 10. Highlights at the company’s booth are the Audi Quattro Spyder and the Audi Avus Quattro. The company presented both prototypes for the first time in 1991. Other singular and rarely shown models round out the show. The Audi booth features, for example, the Audi Group S rally prototype with mid-engine and the only existing Audi motorcycle.