The NZR DC class locomotive is the most common class of locomotive currently in operation on the New Zealand rail network. The locomotives started life as members of the withdrawn DA class diesel-electric locomotives that were built by General Motors Canada. Between 1978 and 1983 the locomotives were rebuilt as the DC class, with a new cab and upgraded engines. Each DC locomotive has a General Motors 12-645C or 12-645E V12 diesel engine and four traction motors, with an authorised maximum speed of 100 km/h. The locomotive is 14 metres long and weighs 82 tonnes.
DC4156 hit a landslide in the Manawatu Gorge on 25 September 2010.
