With the goal of producing a "quality bubble car", the concept was developed further, using Zündapp's engineering input.
The car was powered by a mid-mounted two-stroke, single-cylinder, 245 cubic centimetres (15.0 cu in) engine unique to the Janus, developing 14 hp (10 kW), enabling a top speed of 80 km/h (50 mph).
The front suspension was of the leading arm-type that proved to be very comfortable, and in the rear the car had a swing axle.
[1][2][3] The company added four individually mounted ventilated brake drums, operated via hydraulics.
By mid-1958, having made only a total of 6,902 cars, Zündapp abandoned the project and sold the factory to Bosch.