More than two-thirds of the 1,3 Liters produced were made in the single year of 1934, but the car continued to be manufactured until October 1935, by which time its successor, the innovative unitary bodied Opel Olympia, had already been in production for some six months.

[2] The brakes were now hydraulically controlled,[3] in place of the cable-based system that had stopped the 1,2 Liter, and which continued after 1935 to be fitted on the upgraded version of the smaller model, the Opel P4.

Another advance much trumpeted at the time but not uncontroversial in retrospect was the inclusion of “Synchronous springing” (Synchronfederung), also recently introduced by General Motors in North America.

The system included an axle beam rigidly attached to the chassis frame which reduced the unsprung weight on the vehicle, and it came with the promise of a smooth ride, but on a car as small and (by North American standards) light as the Opel 1,3 Liter, it attracted criticism for a loss of directional control, especially when the car was not driven in a straight line.

Technically astute critics recorded that unless the front wheels were perfectly balanced each time a new tyre was fitted, directional stability was further and alarmingly compromised by savage vibrations travelling up the steering column.

[4] The 1288 cc four-stroke, side-valve engine delivered a claimed maximum output of 24 PS (18 kW; 24 hp) at 3,200 rpm.

The first Olympia came with the same 1288 cc engine and the same 24 PS (18 kW; 24 hp) claimed maximum power level, but its modern unitary body was 110 kg (243 lb), over ten percent, lighter – making it faster and more fuel efficient.