Opel 5/12 PS
The first built series had a 1.2 liter engine with 12 PS at 1800 rpm. The top speed was 50–55 km/h. The car cost between 4,000 and 5,200 Mark. The second series had a larger and more powerful engine. The engine capacity was 1.3 liters. It made 14,5 PS at 1800 rpm. The car cost between 4,200 and 5,200 Mark. The same power capacity was increased to 1.4 liters. It was available as an open top four seater. This model variant was nicknamed "little doll" and cost 7,300 Mark. From 1916, the car received a 1.5 liter engine with 14.5 PS at 1800 rpm. It cost as a two- and four seater 5,300 Mark.
5/12 PS (1911)
It was built from 1911 to 1920 in four series.