Steyr 414 413 Motor D Diesel Engine Oldtimer Csepel Ikarus Bus 31 Steyr 4-cylinder Manufacturer Csepel, license Steyr From the 1970s Prechamber diesel engine Displacement 5517ccm Power 95 hp Csepel built the Steyr motors under license and developed them further. One of the results of this was the drilling enlarged to 112mm, which Csepel then called 414 and 614. For a long time, the D 414 was one of the standard drives for medium-sized Hungarian commercial vehicles, buses and tractors.