The Iarnród Éireann (IÉ) / Northern Ireland Railways 201 Class locomotives are the newest and most powerful diesel locomotives operating in Ireland and were built between 1994 and 1995 by General Motors Diesel. They are model type JT42HCW, fitted with an EMD 12-710G3B engine of 3,200 hp (2,400 kW), weigh 108.862 tonnes (107.1 long tons; 120.0 short tons) and have a maximum speed of 102 mph (164 km/h).