Although all four brands continued to sell cars under their own names and brands, the technological development became more centralized, with some Audi models employing engines by Horch or Wanderer.
Aínda que as catro marcas continuaron a vender autos baixo os seus propios nomes e marcas, o desenvolvemento tecnolóxico centralizouse, e algúns modelos de Audi utilizaron motores de Horch ou Wanderer.