The RK 215 is a line of diesel engines built by MAN (previously Ruston). The RK 215 series is a large four-stroke diesel engine that has an 11-liter displacement per cylinder.[citation needed]
RK215 diesel engines have also been manufactured in Iran by DESA diesel,[1][2]
..contract was signed during September with ALSTOM Transport of France for Ruston to supply 100 traction engines type 16RK215T. The engines were to be used to power one hundred AD43C locomotives for the Iranian Islamic Republic Railways ... Prior to signing the contract Ruston negotiated a Consortium, Transfer of Technology, Localisation and Distribution agreement with the Iran Heavy Engine Manufacturing Company (DESA). The agreement was for Ruston to supply the first engines fully built and the remainder to be built in Iran by DESA ..