EMD 1010

The EMD 1010, also known as the EMD 265, is a line of four-stroke diesel engines built by Electro-Motive Diesel for railway locomotives. Its ancestor, the 265H or H-engine, entered service around 1998 in the SD90MAC and was designed to deliver about 6,300 horsepower from sixteen cylinders, with a 265 millimetre bore and a 300 millimetre stroke giving 1010 cubic inches of displacement per cylinder. Reliability problems and limited operating flexibility made it unsuccessful in North America, where the proven two-stroke EMD 710 was preferred, although it found use in China, India, Australian mining railways and in marine tugboats. Electro-Motive revived the four-stroke design in the mid 2010s as the 1010J, with a two-stage turbocharging system and exhaust gas recirculation, to meet United States Tier 4 emissions rules in the SD70ACe-T4, first unveiled in late 2015.