List of largest 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 there is even a debate on whether or not to include the tender, which is equivalent to the fuel tank of a diesel, in the measurement. To establish the "largest" category, several factors take precedence: overall weight, which gives traction over driving axles; size (length & 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==
Image 	Locomotive Class(es) (And Names)	Railway 	Series 	Manufacturer(s) 	Dates 	Motive power 	Wheel arrangement 	Weight 	Tractive Effort/Force 	Power 	Notes
 	WAG-12 	Indian Railways 	WAG 	Alstom prima 	2020–present 	25KV 50 Hz AC 	 	180 tonnes 	158,715 pounds-force (706 kN) 	12,000 hp 	New generation engine operated through twin engines
150x150px	China Railways HXD1D prototype 	None (experimental) 	N/A 	CSR Zhuzhou 	Before 2012 	Electric 	Co'Co' 	 	77,694 pounds-force (346 kN) 	12,874 horsepower (9,600 kW) 	Currently stored in Zhuzhou plant.
 	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) 	93,000 pounds-force (414 kN) 	6,839 horsepower (5,100 kW) 	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) 	175,000 pounds-force (778 kN) simple; 147,200 pounds-force (655 kN) compound 	N/A 	Weight and performance figures listed for the Virginian variant, as that locomotive was the heavier and more powerful of the two.
 	2ES10S (3ES10) 	Russian Railways 	N/A 	Ural Locomotives 	2014–present 	Electric 	3xBo'Bo' 	300 tonnes (331 short tons) 	264,375 pounds-force (1,176 kN) 	17,701 horsepower (13,200 kW) 1-hour rating 	Three sections modification of 2ES10.
 	4E5K 	Russian Railways 	N/A 	Novocherkassk Electric Locomotive Plant 	2014–present 	Electric 	4xBo'Bo' 	392 tonnes (432 short tons) 	304,840 pounds-force (1,356 kN) 	17,594 horsepower (13,120 kW) 1-hour rating 	Four sections modification of E5K.
 	AD43C 	Iranian Railways (RAI) 	2001-2100 	Alstom 	2001 	Diesel electric 	Co'Co' 	120 tonnes (132 short tons) 	122,000 pounds-force (543 kN) 	4,300 horsepower (3,207 kW) 	About 50 locomotives are stopped because of failures in the RK 215 diesel engines
 	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) 	9,575 pounds-force (265 kN) 	5,930 horsepower (4,422 kW) 	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) 	88,125 pounds-force (392 kN) 	5,766 horsepower (4,300 kW) 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) 	79,360 pounds-force (353 kN) 	5,914 horsepower (4,410 kW) 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) 	105,885 pounds-force (471 kN) 	8,683 horsepower (6,475 kW) 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) 	110,160 pounds-force (490 kN) 	10,945 horsepower (8,162 kW) 1-hour rating; 10,255 horsepower (7,647 kW) continuous 	Exhibit at Swiss Museum of Transport
 	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) 	110,000 pounds-force (489 kN) 	7,500 horsepower (5,593 kW) 	Two on static display
 	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) 	212,312 pounds-force (944 kN) 	8,469 horsepower (6,315 kW); over 10,000 hp at lower altitude and ambient temperatures (turbine only)	Two preserved in museums; Surpassed by GT1s.
 	Big Boy 	Union Pacific 	4000-4024 	ALCO 	1941-–44 	Steam 	4-8-8-4 	548 tonnes (604 short tons) 	135,375 pounds-force (602 kN) 	6,290 horsepower (4,690 kW) 	Several on static display. No. 4014 in service with the UP Heritage Steam collection
 	BJ 6001 	China Railway 	北京6001 	Beijing Feb. 7th 	1969 	Diesel-hydraulic 	D'D' 	N/A 	N/A 	5,900 horsepower (4,400 kW) 	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) 	97,350 pounds-force (433 kN) 	5,000 horsepower (3,728 kW) 	Two locomotives preserved, one on static display. Union Pacific 3985 operated for company PR and occasional excursion service from 1981-2010. Donated to Railroading Heritage of Midwest America in April 2022
 	China Railways DF8DJ 	China Railways 	DF8DJ0001, later DF8B5672 	CSR Ziyang 	2006 	Diesel-electric 	Co'Co' 	150 tonnes (165 short tons; 148 long tons) 	130,389 pounds-force (580 kN) starting
98,916 pounds-force (440 kN) continuous 	6,437 horsepower (4,800 kW) 	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) 	170,000 pounds-force (756 kN) starting; 111,000 pounds-force (494 kN) continuous	12,874 horsepower (9,600 kW) 	N/A
 	China Railways HXD1B 	China Railway 	HXD1B0001-HXD1B0500 	CSR Zhuzhou Electric Locomotive, Siemens 	2009– 	Electric 	Co'Co' 	200 tonnes (220 short tons) 	N/A 	12,874 horsepower (9,600 kW) 	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) 	170,000 pounds-force (756 kN) starting; 111,000 pounds-force (494 kN) continuous	9,655 horsepower (7,200 kW) 	N/A
 	China Railways HXD2 	China Railway 	HXD20001-
HXD20180 	Datong Electric Locomotive, Alstom 	2006–08 	Electric 	Bo'Bo'+Bo'Bo' 	200 tonnes (220 short tons) 	170,000 pounds-force (756 kN) 	13,410 horsepower (10,000 kW) 	N/A
 	China Railways HXD2B 	China Railway 	HXD2B0001-HXD2B0500 	Datong Electric Locomotive, Alstom 	2009– 	Electric 	Co'Co' 	150 tonnes (165 short tons) 	131,000 pounds-force (583 kN) starting; 125,000 pounds-force (556 kN) continuous	12,874 horsepower (9,600 kW) 	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) 	130,000 pounds-force (578 kN) starting; 90,000 pounds-force (400 kN) continuous 	9,655 horsepower (7,200 kW) 	N/A
 	China Railways HXD3 	China Railway 	HXD30001-HXD30890, HXD38001-38150 	Toshiba, Dalian Locomotive 	2006–09 	Electric 	Co'Co' 	150 tonnes (165 short tons) 	130,000 pounds-force (578 kN) 	9,655 horsepower (7,200 kW) 	N/A
 	China Railways HXD3B 	China Railway 	HXD3B0001-HXD3B0500 	Dalian, Bombardier 	2009– 	Electric 	Co'Co' 	150 tonnes (165 short tons) 	128,000 pounds-force (569 kN) starting; 114,000 pounds-force (507 kN) 	12,874 horsepower (9,600 kW) 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) 	130,000 pounds-force (578 kN) starting; 83,000 pounds-force (369 kN) 	9,655 horsepower (7,200 kW) 	N/A
 	China Railways HXN3 	China Railway 	HXN30001 - HXN30300 	Dalian Locomotive, Electro-Motive Diesel 	2008– 	Diesel-Electric 	Co'Co' 	150 tonnes (165 short tons) 	140,000 pounds-force (623 kN) starting;
134,000 pounds-force (596 kN) continuous	6,300 horsepower (4,698 kW) 	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) 	140,000 pounds-force (623 kN) starting; 127,000 pounds-force (565 kN) continuous	6,250 horsepower (4,661 kW) 	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) 	88,125 pounds-force (392 kN) 	7,638 horsepower (5,696 kW) 	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) 	67,443 pounds-force (300 kN) 	8,583 horsepower (6,400 kW) 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) 	70,140 pounds-force (312 kN) 	16,270 horsepower (12,133 kW) or 13,900 horsepower (10,365 kW) short term;
10,433 horsepower (7,780 kW) 1-hour rating; 9,977 horsepower (7,440 kW) continuous rating	One of the most powerful electric locomotives ever built, it also is the most powerful single-frame locomotive ever built (currently its maximum short term power is limited to 12,000 horsepower (8,948 kW)); 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) 	88,800 pounds-force (395 kN) 	8,432 horsepower (6,288 kW) 	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) 	89,930 pounds-force (400 kN) 	8,717 horsepower (6,500 kW) continuous 	One of the most powerful single-frame electric locomotives in operation in Europe.
 	EMD DDA40X 	Union Pacific 	6900-6946 	Electro-Motive Diesel 	1969–71 	Diesel-electric 	Do'Do' 	244 tonnes (269 short tons) 	113,940 pounds-force (507 kN) starting; 103,000 pounds-force (458 kN) continuous	6,600 horsepower (4,922 kW) 	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' 	218 tonnes (240 short tons) 	200,000 pounds-force (890 kN) starting
175,000 pounds-force (778 kN) continuous 	4,400 horsepower (3,281 kW) 	N/A
 	EMD SD90MAC 	Union Pacific 	8500-8561 	Electro-Motive Diesel 	1996–2002	Diesel-electric 	Co'Co' 	210 tonnes (231 short tons) 	200,000 pounds-force (890 kN) starting; 165,000 pounds-force (734 kN) continuous	6,300 horsepower (4,698 kW) 	Retired from service, some on lease with EMLX.
 	Erie Railroad 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) 	176,256 pounds-force (784 kN) 	N/A 	Maximum speed approx. 10 mph.
 	EuroSprinter 	Deutsche Bahn, ÖBB 	N/A 	Krauss-Maffei, Siemens 	1996–2001	Electric 	Bo'Bo' 	86 tonnes (95 short tons) 	7,000 pounds-force (298 kN) 	9,790 horsepower (7,300 kW) short term;
8,583 horsepower (6,400 kW) 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) 	90,000 pounds-force (400 kN) starting; 70,000 pounds-force (311 kN) continuous 	9,400 horsepower (7,010 kW) 	Always used in pairs (one at each end of the train). Early versions were 7,500 horsepower (5,593 kW) 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' 	210 tonnes (231 short tons) 	188,000 pounds-force (836 kN) starting; 166,000 pounds-force (738 kN) continuous	6,250 horsepower (4,661 kW) 	Actual HP output on early production units is 4,350 hp due to use of the 7FDL engine.
 	GT1s 	Russian Railways 	N/A 	Sinara transport machines 	N/A 	Gas turbine-electric 	N/A 	360 tonnes (397 short tons) 	220,313 pounds-force (980 kN) 	11,130 horsepower (8,300 kW) 	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) 	55,060 pounds-force (245 kN) 	3,600 horsepower (2,685 kW) 	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) 	135,000 pounds-force (601 kN) 	8,200 horsepower (6,115 kW) 	N/A
 	Indian locomotive class WAG-9 	Indian Railways 	 	Chittaranjan Locomotive Works, Electric Locomotive Works, Bhusawal	1996– 	Electric 	Co'Co' 	123 tonnes (136 short tons) 	100,000 pounds-force (445 kN); 73,000 pounds-force (325 kN) continuous 	6,600 horsepower (4,922 kW) 	
 	Indian locomotive class WAG-9H 	Indian Railways 	 	Chittaranjan Locomotive Works, Electric Locomotive Works, Bhusawal	2000– 	Electric 	Co'Co' 	132 tonnes (146 short tons) 	120,000 pounds-force (534 kN)
Continuous:73,000 pounds-force (325 kN) 	6,600 horsepower (4,922 kW) 	
 	Indian locomotive class WAG-9HH 	Indian Railways 	90001+ 	Chittaranjan Locomotive Works, India 	2019- 	Electric 	Co'Co' 	135 tonnes (149 short tons) 	 	9,000 horsepower (6,711 kW) 	
 	Indian locomotive class WAG-11 	Indian Railways 	29001+ 	Banaras Locomotive Works Varanasi 	2018–Present 	Electric 	Co'Co' 	 	 	11,000 horsepower 	
 	Indian locomotive class WAG-12 	Indian Railways 	WAG12B60001+ onward 	ELF Madhepura 	2018–present 	Electric 	Bo'Bo'+Bo'Bo' 	180 tonnes (198 short tons; 177 long tons)
Up-gradable to 200 tonnes (220 short tons; 197 long tons)	176,475 pounds-force (785 kN) starting 	12,000 horsepower (8,948 kW) 	
 	IORE 	MTAB 	IORE 101 - 126 	Bombardier 	2000–04 	Electric 	Co'Co'+Co'Co' 	360 tonnes (397 short tons) 	314,732 pounds-force (1,400 kN) 	14,483 horsepower (10,800 kW)
continuous rating (for a pair) 	The most powerful double-frame locomotive in series production. It also has the largest tractive effort of any locomotive ever built. 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) 	175,000 pounds-force (778 kN) 	4,500 horsepower (3,356 kW) 	Struck from the N&W roster on January 4, 1958.
 	JR Freight Class EF200 	JR Freight 	N/A 	Hitachi 	1990– 	Electric 	Bo'Bo'Bo' 	100.8 tonnes (111 short tons) 	59,000 pounds-force (262 kN) 	8,046 horsepower (6,000 kW) 	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) 	101,164 pounds-force (450 kN) 	9,600 horsepower (7,159 kW) (1-hour rating); 9,300 horsepower (6,935 kW) continuous 	73 feet (22 m) overall length.
 	Little Joe 	Milwaukee Road 	EF-4 and EP-4 	General Electric 	1950-80 	Electric 	2-D+D-2 	247.5 tonnes (273 short tons) 	75,700 pounds-force (337 kN) 	5,110 horsepower (3,811 kW) 	Maximum speed of 68 mph, used for freight and passenger.
 	M1 	Chesapeake & 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) 	98,000 pounds-force (436 kN) 	6,000 horsepower (4,474 kW) turbine; 4,960 horsepower (3,699 kW) generators 	Nicknamed "Sacred Cows". Sold back to Baldwin in 1950 and scrapped.
 	Norfolk & Western Y Class 	Norfolk & Western 	N/A 	Roanoke Shops 	1940s 	Steam 	2-8-8-2 	449 tonnes (495 short tons) 	166,000 pounds-force (738 kN) 	5,600 horsepower (4,176 kW) 	Norfolk and Western 2156 is strongest-pulling steam locomotive still in existence.
150px 	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) 	65,500 pounds-force (291 kN) 	4,629 horsepower (3,452 kW) 	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) 	115,816 pounds-force (515 kN) with booster 	7,987 horsepower (5,956 kW) 	Most powerful steam locomotive ever static tested.
 	PRR S1 	Pennsylvania Railroad 	6100 	Altoona Works 	1939 	Steam 	6-4-4-6 	87 tonnes (537 short tons) 	76,403 pounds-force (340 kN) 	7,200 horsepower (5,369 kW) 	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) 	70,500 pounds-force (314 kN) 	6,900 horsepower (5,145 kW) 	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) 	70,590 pounds-force (314 kN) 	6,678 horsepower (4,980 kW) continuous 	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) 	71,940 pounds-force (320 kN) 	9,390 horsepower (7,002 kW) short term 8,410 horsepower (6,271 kW) 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) 	89,475 pounds-force (398 kN) 	10,460 horsepower (7,800 kW) 1-hour rating; 9,705 horsepower (7,237 kW) 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 24 	Shenhua Mining Group 	 	CRRC Zhuzhou 	2020–present 	Electric 	6xBo'Bo' 	 	512,564 pounds-force
(2,280 kN) 	28,800 kilowatts (38,621 hp) 	Six-section modification of HXD1, 106 metres (348 ft) long overall.
 	Shenhua Mining Group HXD1 	Shenhua Mining Group 	HXD1.7 	CRRC Zhuzhou 	2013 	Electric 	3xBo'Bo' 	276 tonnes (304 short tons; 272 long tons) 	256,282 pounds-force (1,140 kN) 	12,900 horsepower (9,620 kW) continuous rating 	Heavy haul locomotive of China
 	SJ Dm3 	SJ 	N/A 	ASEA 	1953–71 	Electric 	1'D+D+D1' 	273 tonnes (301 short tons) 	211,320 pounds-force
(970 kN) 	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' 	20 tonnes (132 short tons) 	97,800 pounds-force (435 kN) 	8,851 horsepower (6,600 kW) 1-hour rating;
8,046 horsepower (6,000 kW) 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)	107,000 pounds-force (476 kN) 	9,387.15 horsepower (7,000 kW) 	
 	Union Pacific 9000 class 	Union Pacific 	9000-9087 	American Locomotive Company 	1926-1930 	Steam 	4-12-2 	355 tonnes (391 short tons) 	97,664 pounds-force (434 kN) 	4,750 horsepower (3,542 kW) 	N/A
 	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) 	N/A 	7,000 horsepower (5,220 kW) (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 	24 tonnes (688 short tons) 	277,500 pounds-force (1,234 kN) 	7,125 horsepower (5,313 kW) (1-hour rating); 6,000 horsepower (4,474 kW) continuous 	152.25 feet (46 m) overall length.
 	VL85 	Russian Railways 	270 	Novocherkassk Electric Locomotive Plant 	1983-94 	Electric 	Bo'Bo'Bo'+Bo'Bo'Bo' 	300 tonnes (331 short tons) 	209,522 pounds-force (932 kN) 	12,550 horsepower (9,359 kW) continuous; 13,437 horsepower (10,020 kW) short term 	N/A
 	Voith Maxima 	N/A 	N/A 	Voith 	2006–14 	Diesel-hydraulic 	Co'Co' 	136 tonnes (150 short tons) 	91,730 pounds-force (408 kN) 	5,000 horsepower (3,728 kW) continuous (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) 	166,600 pounds-force (741 kN) compound 	N/A 	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) 	140,093 pounds-force (623 kN) 	6,250 horsepower (4,661 kW) 	Figures are for the DM&IR Yellowstones, the largest and generally the most well-known of their type.
==External links==
*Steamlocomotive.com article regarding the largest steam locomotives archive at the Internet Archive Wayback Machine
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