Opel 28/70 PS

The Opel 28/70 PS was a upper-class car that Adam Opel KG built only in 1910 as the successor of the 30/50 PS. It was the most powerful model of the Opel range of its day, stronger than the contemporary 34/65 PS although with a smaller displacement. Its four-cylinder side-valve block engine with a 115 mm bore and 175 mm stroke displaced 7,270 cc and produced 70 PS (51 kW) at 1,600 rpm. Power passed through a leather cone clutch, a manual 4-speed gearbox and a propeller shaft to the rear axle, and the car reached a top speed of 90 km/h. It was offered as a four-seat double phaeton, a four-door Pullman saloon or a landaulet. The double phaeton, the cheapest body, cost 15,000 reichsmarks. Production ended at the end of 1910, and the 29/70 PS followed only from 1914.