The story
The Iran Heavy Diesel Engine Mfg Co. (DESA) company was established in 1991 in Amol with the aim of developing industrial production of diesel engines; a factory of over 10,000m2 was constructed on a 80ha site, with facilities for quality testing and research and design.
The company obtained licenses to manufacture Wärtsilä engines and Ruston RK 215 engines under license from MAN. Wärtsilä engine assembly began in 1996, RK 215 engine production began in 2000.
In 2009 the company unveiled Iran's first indigenous heavy diesel engine, the D87.
From Wikipedia’s article on DESA company, shared under CC BY-SA 4.0.3