Opel 10/30 (10/35) PS

The Opel 10/30 (10/35) PS was a model of car manufactured by the German automobile manufacturer Opel between 1922 and 1926. The designation "10/30" and later "10/35" referred to the car's tax horsepower ("10") and actual brake horsepower ("30" or "35"). These figures were a common method of identifying car models in Europe during this period.

The car was a four-cylinder model and represented a significant step in Opel's move towards mass production. It was available in various body styles, including open tourers and closed sedans. The engine was initially rated at 30 PS, but later versions were upgraded to 35 PS, reflected in the name change. The model was designed to be a relatively affordable and reliable vehicle for the growing middle class. It contributed to establishing Opel as a major player in the German automotive market during the interwar period.