NSB Di 1 was a class of diesel-hydraulic locomotives built by Krupp for the Norwegian State Railways (NSB). The locomotive had two MAN diesel engines, giving a combined power output of 1,472 kilowatts (1,974 hp) and allowing the 82.7 tonnes (81.4 long tons; 91.2 short tons) vehicle to reach a maximum speed of 100 km/h (62 mph). It had a 1'BB'1 wheel arrangement and a driver's cab at only one end.