Audi logo produced by Volkswagen is a series of four circles, which is the unified logo used by its predecessor, United Automobile Company, when 1932 was established. The four circles represent the initial merger of Hodge, Audi, DKW and Vandeno, which used to be manufacturers of bicycles, motorcycles and passenger cars. Since the company was originally formed by the merger of four companies, each link is a symbol of one of them. Four interlocking rings with the same radius symbolize the close relationship of equality, mutual benefit and cooperation among company members and the dedication of hard work.

Audi's history of manufacturing cars and motorcycles in Germany can be traced back to19th century. The four automobile companies originally located in Saxony-Audi in Zwickau and Horc, Rover in chemnitz-Siegmar and dkw in zschopau made outstanding contributions to the progress of German automobile industry at that time. The four car companies merged into auto union ag on 1932. In terms of automobile output, the automobile alliance was the second largest automobile manufacturing company in Germany at that time, and its product logo was four connected rings, representing the four automobile companies involved in the merger. The four-ring symbol appeared for the first time in the world.