China Railway DF11

To speed up heavy passenger trains, China Railways started development of a heavy diesel-electric locomotive in 1990. After two DF9 prototypes built for a service speed of 140 km/h, the first DF11 built for 160 km/h was completed in 1992. At a weight of 138 tonnes, it is powered by a sixteen-cylinder with a rated power of 3,860 kW (5,176 hp), calibrated for 3,630 kW in the locomotive. Six DC traction motors have 3,040 kW (4,077 hp) in total.

On test runs, these locomotives could reach a speed of 184 km/h. A normal train load when running at top speed is 640 tonnes, but even passenger trains of 1,100 tonnes can be hauled at a speed of 143 km/h. As with previous Chinese locomotives, they can't deliver head-end power to the train, so separate generator cars are needed.

There is also a special plateau type for service on the highland plains in Western China. These have special filters for running through sandstorms, a slower gear ratio for a top speed of 153 km/h and engine modifications for greater power at altitude. Up to 2005, a total of 459 DF11 have been built for service in several regions of the country. Today they are still omnipresent on many non-electrified lines.