NSU was a German automaker initially founded to produce knitting machines in 1873. It later transitioned to building bicycles, motorcycles, and eventually cars. Now, it’s part of the Volkswagen Group under the Audi brand. The company is headquartered in Neckarsulm, Germany, and historically it was a pioneer in the automotive industry. NSU is particularly remembered for its revolutionary rotary engine designs and the production of the world’s first mass-produced car with a rotary engine, the NSU Ro 80.