Uncovering Audi’s Secret Vault: The Rarest Concept Cars Ever Built! Misc by turboandstance - June 14, 2026 Step inside Audi’s secret museum vault and uncover some of the most extraordinary concept cars ever designed by the German automaker. Guided by Audi Museum curator Stefan Felber, this exclusive tour reveals hidden prototypes and one-off creations that never reached production. Highlights include the mysterious Audi A8 Coupe, a stunning two-door luxury concept built from the A8 platform, and the futuristic Audi Steppenwolf, a bold all-terrain concept packed with innovative technology and unique styling cues. The tour also explores legendary models like the Audi Avus Quattro, a breathtaking mid-engine supercar concept powered by a W12 engine, and the Audi Quattro Spyder, one of the brand’s earliest aluminum sports car studies. Alongside the iconic original Audi TT Concept, these rare vehicles showcase the creativity, ambition, and engineering vision that helped shape Audi’s modern design language. This behind-the-scenes look offers automotive enthusiasts a unique glimpse into concept cars that remained hidden from the public for decades. For more content like this one follow us also on Facebook, Pinterest or Instagram!