Tümosan (Türk Motor Sanayi ve Ticaret A.S. (Turkish Motor Industry and Trade)) is a tractor and engine manufacturer based in Ankara, Turkey. Founded in 1976, Tümosan secured licenses from Fiat for the manufacturing of tractors and diesel engines. They were the first manufacturer of diesel engines in Turkey. They manufactured engines that were also used by Turk Fiat and Otoyol for several years. The licensing agreement with Fiat ended in 1988, and Tümosan has continued manufacturing the existing models under their own brand, as well as developing additional, new models.