SJ T21

Class of 56 Swedish diesel-hydraulic locomotives

T21, originally T2, is a diesel-hydraulic locomotive operated by Swedish State Railways (Swedish: Statens Järnvägar, SJ) and Nora Bergslags Järnväg (NBJ) of Sweden. 60 units were built between 1955 and 1963 by Maschinenbau Kiel and Svenska Järnvägsverkstäderna, based on the German DB Class V65 and technically identical to the MaK 800D.