# List of most powerful locomotives

As railroads around the world haul larger quantities of freight efficiently, the title of world's most powerful locomotive has often been passed to new generations of rolling stock.

## Standard

There are many ways in which a locomotive can be the largest: the heaviest, longest, most cylinders, most power, or most wheels. It is often defined as the longest in length, but even then sources differ on whether the measurement should include the tender of a steam locomotive. A steam locomotive that has a tender cannot function without it, but (with rare exceptions) the tender does not contribute to traction. To establish the "largest" category, several factors take precedence: overall weight, which gives traction over driving axles; size (length and height of engine itself); and power, which may be in terms of raw horsepower, tractive effort, available power at axles (shaft horsepower) or, in the case of steam locomotives, available steam on a sustained basis.

## List

| Name | Original owner | Fleet numbers | Manufacturer | Year of manufacture | Drive type | Wheel arrangement | Weight | Tractive effort/force | Power | Notes |
| 2ЭС10 with 2ЭС10С unit | Russian Railways | — | Ural Locomotives | 2014–present | Electric | 3×Bo'Bo' | 300 tonnes (331 short tons) | 1,176 kilonewtons (264,375 lbf) | 13,200 kilowatts (17,701 hp) 1-hour rating | Three sections modification of 2ES10. |
| 4ЭС5К [ru] | Russian Railways | — | Novocherkassk Electric Locomotive Plant | 2014–present | Electric | 4×Bo'Bo' | 392 tonnes (432 short tons) | 1,356 kilonewtons (304,840 lbf) | 13,120 kilowatts (17,594 hp) 1-hour rating | Four sections modification of E5K. |
| 060-EA | Romanian Railways (CFR) and numerous private railways in Romania and Hungary | 40 (060-EA): 120 km/h, 41 (060-EA1): 160 km/h, 42: 200 km/h | ASEA (first ten), Electroputere Craiova (the rest, approx. 1,000) | 1965-91 | Electric | Co'Co' | 120 tonnes (132 short tons) | 414 kilonewtons (93,000 lbf) | 5,100 kilowatts (6,839 hp) | Powerful locomotive in the 1970s; high continuous tractive effort. |
| 2-10-10-2 | Santa Fe and Virginian Railway | 3000-3009 (Santa Fe) 800-809 (Virginian) | Baldwin Locomotive Works (Santa Fe) American Locomotive Company (Virginian) | 1911-1912, 1918 | Steam | 2-10-10-2 | 415 tonnes (457 short tons) | 778 kilonewtons (175,000 lbf) simple; 655 kilonewtons (147,200 lbf) compound | — | Weight and performance figures listed for the Virginian variant, as that locomotive was the heavier and more powerful of the two. |
| AA20 | Russian Railways | — | Voroshilovgrad | 1934 | Steam | 4-14-4 | 140 tonnes (154 short tons) | 320 kilonewtons (71,940 lbf) | 2,723 kilowatts (3,652 hp) | Largest non-articulated steam locomotive, and the only seven-axle non-articulated steam locomotive ever built. |
| AD60 class | New South Wales Government Railways | 6001-6042 | Beyer, Peacock & Company | 1952–1954, 1956 | Steam | 4-8-4+4-8-4 | 255 tonnes (281 short tons) | 265 kilonewtons (59,575 lbf) | 4,422 kilowatts (5,930 hp) | Largest steam locomotive ever operated in Australia |
| Ae 6/6 | Swiss Federal Railways | 11401-11520 | SLM, MFO/BBC | 1952; 1955–66 | Electric | Co'Co' | 120 tonnes (132 short tons) | 392 kilonewtons (88,125 lbf) | 4,300 kilowatts (5,766 hp) continuous | Still in operation as of October 2012 |
| Ae 6/8 | BLS, Switzerland | 201-208 | SLM / Sécheron | 1939 | Electric | (1'Co)(Co1') | 140 tonnes (154 short tons) | 353 kilonewtons (79,360 lbf) | 4,410 kilowatts (5,914 hp) 1-hour rating | Two remain in working order as heritage locos |
| Ae 8/8 | BLS, Switzerland | 271-275 | SLM / BBC | 1959-66 | Electric | (Bo)(Bo)+(Bo)(Bo) | 160 tonnes (176 short tons) | 451 kilonewtons (101,413 lbf) starting; 304 kilonewtons (68,343 lbf) 1-hour rating | 6,472 kilowatts (8,680 hp) 1-hour rating | One preserved in working order. |
| Ae 8/14 | Swiss Federal Railways | 11852 | SLM, MFO/BBC | 1939 | Electric | (1'A)A1'A(A1')+(1'A)A1'A(A1') | 236 tonnes (260 short tons) | 490 kilonewtons (110,160 lbf) | 8,162 kilowatts (10,945 hp) 1-hour rating; 7,647 kilowatts (10,255 hp) continuous | Exhibit at Swiss Museum of Transport |
| H-8 Allegheny | Chesapeake & Ohio Railway Virginian Railway | 1600-1659 (C&O), 900-907 (VGN) | Lima Locomotive Works | 1941–48 | Steam | 2-6-6-6 | 544 tonnes (600 short tons) | 489 kilonewtons (110,000 lbf) | 5,593 kilowatts (7,500 hp) | Two on static display |
| GTEL third generation Big Blow | Union Pacific | 1-30 (control cab), 1B-30B (turbine unit) | General Electric | 1958–61 | Gas turbine-electric | C-C+C-C | 425 tonnes (468 short tons) | 944 kilonewtons (212,312 lbf) | 6,315 kilowatts (8,469 hp); over 10,000 hp at lower altitude and ambient temperatures (turbine only) | Two preserved in museums; Surpassed by GT1s [ru]. |
| 4884-1 Big Boy | Union Pacific | 4000-4019 | ALCO | 1941 | Steam | 4-8-8-4 | 540 tonnes (595 short tons) | 602 kilonewtons (135,375 lbf) | 4,690 kilowatts (6,290 hp) | Several on static display. No. 4014 in service with the UP Heritage Steam collection |
| 4884-2 Big Boy | Union Pacific | 4020-4024 | ALCO | 1944 | Steam | 4-8-8-4 | 548 tonnes (604 short tons) | | | No. 4023 on static display. |
| EQJ1 | China Railway | 北京6001 | Beijing Feb. 7th | 1969 | Diesel-hydraulic | D'D' | 183.5 tonnes (202.3 short tons) | 595 kilonewtons (133,821 lbf) starting 420 kilonewtons (94,358 lbf) continuous | 4,413 kilowatts (5,918 hp); 3,972 kilowatts (5,326 hp) in actual service | Most powerful diesel-hydraulic locomotive ever built. |
| Challenger | Union Pacific | 3950-3999 | ALCO | 1936–43 | Steam | 4-6-6-4 | 485 tonnes (535 short tons) | 433 kilonewtons (97,350 lbf) | 3,728 kilowatts (5,000 hp) | Two locomotives preserved, one on static display. Union Pacific 3985 operated for company PR and occasional excursion service from 1981 to 2010. Donated to Railroading Heritage of Midwest America in April 2022 |
| China Railways DF8DJ | China Railway | DF8DJ0001, later DF8B5672 | CSR Ziyang | 2006 | Diesel-electric | Co'Co' | 150 tonnes (165 short tons) | 580 kilonewtons (130,389 lbf) starting 440 kilonewtons (98,916 lbf) continuous | 4,800 kilowatts (6,437 hp) | Most powerful single-engine diesel locomotive ever built. |
| China Railways HXD1 | China Railway | HXD10001 - HXD10220 | CSR Zhuzhou Electric Locomotive, Siemens | 2006–08 | Electric | Bo'Bo'+Bo'Bo' | 200 tonnes (220 short tons) | 760 kilonewtons (170,855 lbf) starting | 9,600 kilowatts (12,874 hp) continuous | — |
| China Railways HXD1B | China Railway | HXD1B0001-HXD1B0500 | CSR Zhuzhou Electric Locomotive, Siemens | 2009– | Electric | Co'Co' | 150 tonnes (165 short tons) | — | 9,600 kilowatts (12,874 hp) | One of the most powerful single-frame locomotives currently in series production. |
| China Railways HXD1C | China Railway | HXD1C0001-HXD1C0990 | CSR Zhuzhou Electric Locomotive, Siemens | 2009– | Electric | Co'Co' | 150 tonnes (165 short tons) | 570 kilonewtons (128,141 lbf) starting | 7,200 kilowatts (9,655 hp) | — |
| China Railways HXD2 | China Railway | HXD20001- HXD20180 | Datong Electric Locomotive, Alstom | 2006–08 | Electric | Bo'Bo'+Bo'Bo' | 200 tonnes (220 short tons) | 760 kilonewtons (170,855 lbf) starting | 10,000 kilowatts (13,410 hp) continuous | — |
| China Railways HXD2B | China Railway | HXD2B0001-HXD2B0500 | Datong Electric Locomotive, Alstom | 2009– | Electric | Co'Co' | 150 tonnes (165 short tons) | 584 kilonewtons (131,288 lbf) starting; 455 kilonewtons (102,288 lbf) continuous | 9,600 kilowatts (12,874 hp) | One of the most powerful single-frame locomotives currently in series production. |
| China Railways HXD2C | China Railway | HXD2C0001- | Datong Electric Locomotive, Alstom | 2010– | Electric | Co'Co' | 150 tonnes (165 short tons) | 570 kilonewtons (128,141 lbf) starting; 400 kilonewtons (89,924 lbf) continuous | 7,200 kilowatts (9,655 hp) | — |
| China Railways HXD3 | China Railway | HXD30001-HXD30890, HXD38001-38150 | Toshiba, Dalian Locomotive | 2006–09 | Electric | Co'Co' | 150 tonnes (165 short tons) | 570 kilonewtons (128,141 lbf) | 7,200 kilowatts (9,655 hp) | — |
| China Railways HXD3B | China Railway | HXD3B0001-HXD3B0500 | Dalian, Bombardier | 2009– | Electric | Co'Co' | 150 tonnes (165 short tons) | 570 kilonewtons (128,141 lbf) starting; 506 kilonewtons (113,753 lbf) | 9,600 kilowatts (12,874 hp) 1-hour rating | One of the most powerful single-frame locomotives currently in series production. |
| China Railways HXD3C | China Railway | HXD3C0001- | Dalian, Bombardier | 2010– | Electric | Co'Co' | 150 tonnes (165 short tons) | 570 kilonewtons (128,141 lbf) starting; 400 kilonewtons (89,924 lbf) continuous | 7,200 kilowatts (9,655 hp) | |
| China Railways HXN3 | China Railway | HXN30001 - HXN30300 | Dalian Locomotive, Electro-Motive Diesel | 2008– | Diesel-Electric | Co'Co' | 150 tonnes (165 short tons) | 620 kilonewtons (139,382 lbf) starting; 598 kilonewtons (134,436 lbf) continuous | 4,660 kilowatts (6,249 hp) | Most powerful diesel-electric locomotive in active production. |
| China Railways HXN5 | China Railway | HXN50001 - HXN50300 | GE, CRRC Qishuyan | 2008– | Diesel-Electric | Co'Co' | 150 tonnes (165 short tons) | 623 kilonewtons (140,000 lbf) starting; 565 kilonewtons (127,000 lbf) continuous | 4,661 kilowatts (6,250 hp) | Most powerful diesel-electric locomotive in active production. |
| Class 461 | Železnice Srbije, Serbia | ŽS461-0/1, ŽS461-2 | Electroputere Craiova, Romania | 1965–91 | Electric | Co'Co' | 120 tonnes (132 short tons) | 392 kilonewtons (88,125 lbf) | 5,696 kilowatts (7,638 hp) | Operational in Romania, Serbia, Montenegro, Bulgaria, Hungary & Macedonia. |
| DB Class 101 | Deutsche Bahn | 101 001-145 | Adtranz | 1996–99 | Electric | Bo'Bo' | 83 tonnes (91 short tons) | 300 kilonewtons (67,443 lbf) | 6,400 kilowatts (8,583 hp) continuous | Maximum speed 220 km/h (137 mph). |
| DB Class 103 | Deutsche Bahn | 103 101-245 | AEG, Brown, Boveri & Cie, Henschel, Krauss-Maffei, Krupp, Siemens | 1970–73 | Electric | Co'Co' | 114 tonnes (126 short tons) | 312 kilonewtons (70,140 lbf) | 12,133 kilowatts (16,270 hp) or 10,365 kilowatts (13,900 hp) short term; 7,780 kilowatts (10,433 hp) 1-hour rating; 7,440 kilowatts (9,977 hp) continuous rating | One of the most powerful electric locomotives ever built, it also is the most powerful (short term) single-frame locomotive ever built (currently its maximum short term power is limited to 9,000 kilowatts (12,069 hp)); It has immense short term power with a tractive effort of 312 kN up to a speed of 140 km/h (87 mph). |
| DB Class 151 | Deutsche Bahn | 151 001-170 | AEG, BBC, Henschel, Krauss-Maffei, Krupp, Siemens | 1972–78 | Electric | Co'Co' | 118 tonnes (130 short tons) | 395 kilonewtons (88,800 lbf) | 6,288 kilowatts (8,432 hp) | Powerful freight locomotive in the 1970s with high continuous tractive effort. |
| DSB EG | DB Schenker Rail | 3103-3113 | Siemens | 1999–2000 | Electric | Co'Co' | 132 tonnes (146 short tons) | 400 kilonewtons (89,924 lbf) | 6,500 kilowatts (8,717 hp) continuous | One of the most powerful single-frame electric locomotives in operation in Europe; surpassed by Euro 9000 [de]. |
| EMD DDA40X | Union Pacific | 6900-6946 | Electro-Motive Diesel | 1969–71 | Diesel-electric | Do'Do' | 244 tonnes (269 short tons) | 507 kilonewtons (113,940 lbf) starting; 458 kilonewtons (103,000 lbf) continuous | 4,922 kilowatts (6,600 hp) | One operational, 13 in various museums; largest operational single-unit diesel locomotive and the most powerful. |
| EMD SD70ACe-T4 | Union Pacific BNSF CSX | 3000-3099 (Union Pacific) | Electro-Motive Diesel (EMD) | 2015–present | Diesel-electric | Co'Co' | 194 tonnes (214 short tons) | 890 kilonewtons (200,000 lbf) starting 778 kilonewtons (175,000 lbf) continuous | 3,281 kilowatts (4,400 hp) | — |
| EMD SD90MAC | Union Pacific | 8500-8561 | Electro-Motive Diesel | 1996–2002 | Diesel-electric | Co'Co' | 193 tonnes (213 short tons) | 890 kilonewtons (200,000 lbf) starting; 734 kilonewtons (165,000 lbf) continuous | 4,698 kilowatts (6,300 hp) | Retired from service, some on lease with EMLX. |
| Erie Class P-1 | Erie Railroad | 2603-2605, later 5014-5016 | Baldwin Locomotive Works | 1914-1916 | Steam | 2-8-8-8-2 | 531 tonnes (585 short tons) | 784 kilonewtons (176,256 lbf) | — | Maximum speed approx. 10 mph. |
| EuroSprinter | Deutsche Bahn, ÖBB | — | Krauss-Maffei, Siemens | 1996–2001 | Electric | Bo'Bo' | 86 tonnes (95 short tons) | 300 kilonewtons (67,443 lbf) | 7,300 kilowatts (9,790 hp) short term; 6,400 kilowatts (8,583 hp) continuous | Maximum speed 230 km/h (143 mph); Taurus Rh 1216 050-5 holds the world speed record for conventional electric locomotives at 357 km/h (222 mph). |
| Eurotunnel Class 9 | Getlink | 9000 | Euroshuttle Locomotive Consortium | 1993-2002 | Electric | Bo-Bo-Bo | 132 tonnes (146 short tons) | 400 kilonewtons (89,924 lbf) starting; 310 kilonewtons (69,691 lbf) continuous | 7,000 kilowatts (9,387 hp) | Always used in pairs (one at each end of the train). Early versions were 5,600 kilowatts (7,510 hp) but most have been rebuilt to 7 MW. |
| GE AC6000CW | Union Pacific; CSX; BHP | 600–699, 5000–5016, 6070–6077, 7500-7579 (being overhauled and renumbered 69xx) | General Electric | 1996–2001 | Diesel-electric | Co'Co' | 196 tonnes (216 short tons) | 836 kilonewtons (188,000 lbf) starting; 738 kilonewtons (166,000 lbf) continuous | 4,661 kilowatts (6,250 hp) | Actual HP output on early production units is 4,350 hp due to use of the 7FDL engine. |
| GT1s [ru] | Russian Railways | — | Sinara transport machines | — | Gas turbine-electric | — | 360 tonnes (397 short tons) | 980 kilonewtons (220,313 lbf) | 8,300 kilowatts (11,130 hp) | Currently the most powerful non-electric locomotive ever produced. |
| H220 | Victorian Railways | H class | Newport Workshops | 1941–1958 | Steam | 4-8-4 | 265 tonnes (292 short tons) | 245 kilonewtons (55,060 lbf) | 2,685 kilowatts (3,600 hp) | The most powerful steam locomotive built in Australia at the time. Only one was constructed, preserved at the Australian Railway Historical Society Museum. |
| Indian locomotive class WAG-7 | Indian Railways | 27001–27999, 28000–28770, 24501-24700 | Chittaranjan Locomotive Works, India, BHEL, India | 1992 | Electric | Co'Co' | 132 tonnes (146 short tons) | 601 kilonewtons (135,000 lbf) | 3,989 kilowatts (5,350 hp) | The WAG-7 is one of the most successful locomotives of Indian Railways currently serving both freight and passenger trains for over 31 years |
| Indian locomotive class WAG-9 | Indian Railways | | Chittaranjan Locomotive Works, Electric Locomotive Works, Bhusawal | 1996– | Electric | Co'Co' | 123 tonnes (136 short tons) | 445 kilonewtons (100,000 lbf); 325 kilonewtons (73,000 lbf) continuous | 4,922 kilowatts (6,600 hp) | WAG-9 has quickly become one of the important locos in the Indian railways. |
| Indian locomotive class WAG-9H | Indian Railways | | Chittaranjan Locomotive Works, Electric Locomotive Works, Bhusawal | 2000– | Electric | Co'Co' | 132 tonnes (146 short tons) | 534 kilonewtons (120,000 lbf) Continuous:325 kilonewtons (73,000 lbf) | 4,922 kilowatts (6,600 hp) | The WAG-9 locomotive is referred to as the "Heavy Haul" freight locomotive of the Indian Railways |
| Indian locomotive class WAG-9HH | Indian Railways | 90001+ | Chittaranjan Locomotive Works, India | 2019- | Electric | Co'Co' | 135 tonnes (149 short tons) | | 6,711 kilowatts (9,000 hp) | A passenger variant of the WAG-9 was developed namely the WAP-7 locomotive by modifying the gear ratio to pull lighter loads at higher speeds. |
| Indian locomotive class WAG-11 | Indian Railways | 29001+ | Banaras Locomotive Works Varanasi | 2018–Present | Electric | Co'Co'+Co'Co' | | | 8,948 kilowatts (12,000 hp) | India's Indigenously developed 12000hp electric loco. |
| Indian locomotive class WAG-12 | Indian Railways | WAG12B60001+ onward | ELF Madhepura | 2018–present | Electric | Bo'Bo'+Bo'Bo' | 180 tonnes (198 short tons) Up-gradable to 200 tonnes (220 short tons) | 785 kilonewtons (176,475 lbf) starting | 8,948 kilowatts (12,000 hp) | |
| IORE | MTAB | IORE 101 - 126 | Bombardier | 2000–04 | Electric | Co'Co'+Co'Co' | 360 tonnes (397 short tons) | 1,400 kilonewtons (314,732 lbf) | 10,800 kilowatts (14,483 hp) continuous rating (for a pair) | The most powerful double-frame locomotive in series production. It is possible to operate individual halves, however it is not usually done. |
| Jawn Henry | Norfolk & Western | 2300 | Baldwin Locomotive Works | 1954-58 | Steam turbine electric | C+C-C+C | 404 tonnes (445 short tons) | 778 kilonewtons (175,000 lbf) | 3,356 kilowatts (4,500 hp) | Struck from the N&W roster on January 4, 1958. |
| JR Freight Class EF200 | JR Freight | — | Hitachi | 1990– | Electric | Bo'Bo'Bo' | 100.8 tonnes (111 short tons) | 261 kilonewtons (58,643 lbf) | 6,000 kilowatts (8,046 hp) | Most powerful single-frame narrow-gauge locomotive in series production. |
| Korail Class 8500 | Korail | 8501-8587 | Hyundai Rotem | 2012-2014 | Electric | Co'Co' | 132 tonnes (146 short tons) | 450 kilonewtons (101,164 lbf) | 6,600 kilowatts (8,851 hp) | |
| Leone Rock DF8BJ | Leone Rock Metal Group | LRMG-001 to 010 | CRRC Ziyang | 2024 | Diesel-electric | Co'Co' | | | 3,680 kilowatts (4,935 hp) | Most powerful narrow-gauge diesel locomotive in single frame |
| Little Joe | Milwaukee Road | EF-4 and EP-4 | General Electric | 1950-80 | Electric | 2-D+D-2 | 247.5 tonnes (273 short tons) | 337 kilonewtons (75,700 lbf) | 3,811 kilowatts (5,110 hp) | Maximum speed of 68 mph, used for freight and passenger. |
| M-1 | Chesapeake and Ohio Railway | 500-502 | Baldwin Locomotive Works | 1947–50 | Steam turbine electric | 2-C1-2-C1-B (4-8-0-4-8-4) | 428 tonnes (472 short tons) | 436 kilonewtons (98,000 lbf) | 4,474 kilowatts (6,000 hp) turbine; 3,699 kilowatts (4,960 hp) generators | Nicknamed "Sacred Cows". Sold back to Baldwin in 1950 and scrapped. |
| Class M-137 | Western Pacific Railroad | 251-260 | Baldwin Locomotive Works | 1931, 1938 | Steam | 2-8-8-2 | 487 tonnes (537 short tons) | 610 kilonewtons (137,174 lbf) | — | Largest steam locomotives owned by Western Pacific. |
| MPXpress MP54AC | GO Transit | 667-682 | MotivePower Industries | 2017-2018 | Diesel-electric | Bo'Bo' | 127–132 tonnes (140–145 short tons) | 369 kilonewtons (82,900 lbf) starting; 226 kilonewtons (50,700 lbf) continuous | 3,430 kilowatts (4,600 hp) traction; 4,027 kilowatts (5,400 hp) gross | Highest power diesel passenger locomotive in North America |
| Norfolk & Western Y Class | Norfolk & Western | — | Roanoke Shops | 1940s | Steam | 2-8-8-2 | 449 tonnes (495 short tons) | 738 kilonewtons (166,000 lbf) | 4,176 kilowatts (5,600 hp) | Norfolk and Western 2156 is strongest-pulling steam locomotive still in existence. |
| PRR GG1 | Pennsylvania Railroad, Penn Central, Conrail, Amtrak and NJ Transit | 4800–4938, 900-929 | Altoona Works, General Electric | 1934–43 | Electric | 2-C+C-2 (4-6-6-4) | 216.4 tonnes (239 short tons) | 291 kilonewtons (65,500 lbf) | 3,452 kilowatts (4,629 hp) | Most scrapped; the prototype and 15 production locomotives have been preserved in museums. |
| PRR Q2 | Pennsylvania Railroad | 6131, 6175-6199 | Altoona Works | 1941–45 | Steam | 4-4-6-4 | 456 tonnes (503 short tons) | 515 kilonewtons (115,816 lbf) with booster | 5,956 kilowatts (7,987 hp) | Most powerful steam locomotive ever static tested. |
| PRR S1 | Pennsylvania Railroad | 6100 | Altoona Works | 1939 | Steam | 6-4-4-6 | 487 tonnes (537 short tons) | 340 kilonewtons (76,403 lbf) | 5,369 kilowatts (7,200 hp) | Fast passenger steam locomotive; the magazine Popular Mechanics cites 1941 a speed of 133.4 mph (214.7 km/h) |
| PRR S2 | Pennsylvania Railroad | 6200 | Baldwin Locomotive Works | 1944 | Steam turbine direct-drive | 6-8-6 | 470 tonnes (518 short tons) | 314 kilonewtons (70,500 lbf) | 5,145 kilowatts (6,900 hp) | Most powerful steam turbine locomotive ever built. |
| Re 4/4 | BLS, Switzerland | Re 425 161-Re 425 195) | SLM / BBC | 1964-83 | Electric | Bo'Bo' | 80 tonnes (88 short tons) | 314 kilonewtons (70,548 lbf) | 4,980 kilowatts (6,678 hp) 1-hour rating | In operation as of October 2012 |
| Re 465 | BLS, Switzerland | Re 465 001-465 0018 | SLM, ABB | 1994-97 | Electric | Bo'Bo' | 84 tonnes (93 short tons) | 320 kilonewtons (71,940 lbf) | 7,002 kilowatts (9,390 hp) short term 6,271 kilowatts (8,410 hp) continuous; | Similar locomotives with slightly different technical data are in operation with SBB (Re 460; 119 pc/NSB (El 18; 22 pc)/VR (Sr2; 46 pc)/KCRC (Hong Kong; 2 pc). |
| Re 6/6 | SBB, Switzerland | 11601-11689 | SLM, MFO/BBC/Sécheron | 1972, 1975–80 | Electric | Bo'Bo'Bo' | 120 tonnes (132 short tons) | 394 kilonewtons (88,626 lbf) | 7,796 kilowatts (10,455 hp) 1-hour rating 7,240 kilowatts (9,708 hp) continuous | At the time of construction (1972) one of the world's most powerful locomotives. Currently in operation as of May 2022 with the revised classification of Re 620. |
| Shen 12 | Shenhua Mining Group | HXD1.7 | CRRC Zhuzhou | | Electric | 3×Bo'Bo' | 276 tonnes (304 short tons) | 1,140 kilonewtons (256,282 lbf) starting | 14,400 kilowatts (19,311 hp) continuous rating | Three-section modification of the HXD1. |
| Shen 24 | Shenhua Mining Group | | CRRC Zhuzhou | 2020–present | Electric | 6×Bo'Bo' | | 2,280 kilonewtons (512,564 lbf) | 28,800 kilowatts (38,621 hp) | Six-section modification of HXD1, 106 metres (348 ft) long overall. |
| SJ Dm3 | SJ | — | ASEA | 1953–71 | Electric | 1'D+D+D1' | 273 tonnes (301 short tons) | 940 kilonewtons (211,320 lbf) | 7,200 kilowatts (9,655 hp) | Highest continuous tractive effort when built, most powerful locomotive using jackshafts. |
| Softronic Transmontana | Romanian Railways (CFR) and diverse private railways in Romania and Hungary | 480 (Romania) 610 (Hungary) | Softronic Craiova | 2010–present | Electric | Co'Co' | 120 tonnes (132 short tons) | 435 kilonewtons (97,800 lbf) | 6,600 kilowatts (8,851 hp) 1-hour rating; 6,000 kilowatts (8,046 hp) continuous | Based on the ASEA 060-EA, but with asynchronous traction motors, IGBT and computerized control. |
| Stadler Euro Dual | N/A | N/A | Stadler Rail | 2012 | Dual power electro-diesel locomotive | Co'Co' | 114 tonnes (126 short tons) - 126 tonnes (139 short tons) | 500 kilonewtons (112,500 lbf) | 7,000 kilowatts (9,387.15 hp) | |
| Stadler Euro 9000 [de] | European Loc Pool [de] | 2019 302– | Stadler Rail | 2020– | Dual power electro-diesel locomotive | Co'Co' | 123 tonnes (136 short tons) | 500 kilonewtons (112,404 lbf) | 9,000 kilowatts (12,069 hp) AC mode | Most powerful (continuous) single-frame locomotive in Europe. |
| Union Pacific 9000 class | Union Pacific | 9000-9087 | American Locomotive Company | 1926-1930 | Steam | 4-12-2 | 355 tonnes (391 short tons) | 434 kilonewtons (97,664 lbf) | 3,542 kilowatts (4,750 hp) | — |
| Union Pacific Coal GTELs | Union Pacific | 80 (later 8080) | Union Pacific Omaha Shops | 1961 | Diesel-electric + gas turbine-electric | A1A-A1A+2-D-D-2 | 661 tonnes (729 short tons) | — | 5,220 kilowatts (7,000 hp) (2,000 hp Diesel + 5,000 hp turbine) | Home-built experimental coal-fired gas turbine. Assembled from ALCO PA-1 UP #607, GN W1 #5018, and the tender from Challenger #3990. 215 feet (66 m) overall length; 1,457,280 pounds (661,011 kg) total weight. Unsuccessful; set aside in 1964 and scrapped in 1968. |
| Virginian Railway EL-3A | Virginian Railway | 100-109 | ALCO + Westinghouse | 1925-1926 | Electric | 1-D-1+1-D-1+1-D-1 | 624 tonnes (688 short tons) | 1,234 kilonewtons (277,500 lbf) | 5,313 kilowatts (7,125 hp) (1-hour rating); 4,474 kilowatts (6,000 hp) continuous | 152.25 feet (46 m) overall length. |
| ВЛ85 | Russian Railways | 270 | Novocherkassk Electric Locomotive Plant | 1983-94 | Electric | Bo'Bo'Bo'+Bo'Bo'Bo' | 300 tonnes (331 short tons) | 932 kilonewtons (209,522 lbf) | 9,359 kilowatts (12,550 hp) continuous; 10,020 kilowatts (13,437 hp) short term | — |
| Voith Maxima | — | — | Voith | 2006–14 | Diesel-hydraulic | Co'Co' | 135 tonnes (149 short tons) | 408 kilonewtons (91,722 lbf) | 3,600 kilowatts (4,828 hp) engine (Maxima 40CC) | Voith Maxima 40CC is the most powerful single-engine diesel-hydraulic locomotive ever built. |
| XA Triplex | Virginian Railway | 700 | Baldwin | 1916 | Steam | 2-8-8-8-4 | 532 tonnes (586 short tons) | 741 kilonewtons (166,600 lbf) compound | — | Rebuilt into separate locomotives; Maximum speed approx. 10 mph. |
| Yellowstone | Northern Pacific, Duluth, Missabe & Iron Range Railway and Baltimore & Ohio | 220-237 (DM&IR) | Baldwin Locomotive Works | 1928-1945 | Steam | 2-8-8-4 | 566 tonnes (624 short tons) | 623 kilonewtons (140,093 lbf) | 4,661 kilowatts (6,250 hp) | Figures are for the DM&IR Yellowstones, the largest and generally the most well-known of their type. |