name railway series maker dates drive wheel arrangement weight power notes
Re 465 BLS, Switzerland Re 465 001-465 0018 SLM, ABB 1994-97 electric Bo-Bo 84 t 9,520 horsepower (7,099 kW)

[Tractive force: 300 kN (30.6 tons)

most powerful locomotive with only four axles, 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 t 10,908 horsepower (8,134 kW) Tractive force: 398 kN (41 tons) in operation (October 2012), revised classification Re 620, most powerful single-frame locomotive till China Railways HXD1B appeared
Re 4/4 BLS, Switzerland Re 425 161-Re 425 195) SLM / BBC 1964-83 electric (Bo)(Bo) 80 t 6,772 horsepower (5,050 kW) Tractive force 314 kN (32 tons) in operation (October 2012)
Ae 8/8 BLS, Switzerland 271-275 SLM / BBC 1959-66 electric (Bo)(Bo)+(Bo)(Bo) 160 t 8,806 horsepower (6,567 kW), tractive force 471 kN (48 tons) 1 preserved in working order
AD43C Iranian Railways(RAI) 2001-2100 ALSTOM 2001 Diesel Electric Co'Co' 120 t 4,300 horsepower (3,207 kW) about 50 locomotives are stopped because of failures in the RK215 diesel engine
Ae 6/6 SBB, Switzerland 11401-11520 SLM, MFO/ BBC 1952; 1955–66 electric Co-Co 120 t 6,000 horsepower (4,474 kW) [Tractive force: 392 kN (40 tons) still in operation (October 2012)
Ae 6/8 BLS, Switzerland 201-208 SLM / Sécheron 1939 electric (1'Co)(Co1') 140 t 6,000 horsepower (4,474 kW), tractive force 353 kN (36 tons) 2 remain in working order as heritage locos
Ae 8/14 SBB, Switzerland 11852 SLM, MFO/ BBC 1939 electric (1'A)A1'A(A1')+(1'A)A1'A(A1') 236 t 11,000 horsepower (8,203 kW), Tractive force: 490 kN (50 tons) Exhibit at Swiss Transport Museum
PRR GG1 Pennsylvania Rail Road (PRR), Penn Central, Conrail, Amtrak & NJ Transit 4800-4938, 900-929 Altoona Works, General Electric 1934–43 Electric 2-C+C-2 (4-6-6-4) 208.9 to 216.4 4,629 horsepower (3,452 kW), Tractive Effort: 65,500 lbf Most scrapped; the prototype and 15 production locomotives preserved in museums
Class 461 Železnice Srbije, Serbia ŽS461-0/1, ŽS461-2 Electroputere Craiova, Romania 1965–91 Electric Co'Co' 120 t 7,638 horsepower (5,696 kW) Operational in Romania, Serbia, Montenegro, Bulgaria, Hungary & Macedonia.
Allegheny Chesapeake and Ohio Railway (C&O) & Virginian Railway (VGN) 1600-1659 (C&O), 900-907 (VGN) Lima Locomotive Works 1941–48 Steam 2-6-6-6 544 t 7,500 horsepower (5,593 kW) Two on static display
M1 Chesapeake and Ohio Railway (C&O) 500-502 Baldwin Locomotive Works 1947–50 Steam Turbine Electric 2-C1-2-C1-B

(4-8-0-4-8-4)

428 t 6,000 horsepower (4,474 kW) Nicknamed "Sacred Cows". Sold back to Baldwin in 1950 and scrapped.
Big Boy Union Pacific X4000-X4024 ALCO 1941-–44 Steam 4-8-8-4 548 t 6,290 horsepower (4,690 kW) Several on static display.

No. 4014 is to be moved from Pomona, Calif., to Cheyenne, Wyo. for restoration.

XA Triplex Virginian Railway 700 Baldwin 1916 Steam 2-8-8-8-4 383 t N/A, Tractive Effort: 199,560 lb simple; 166,600 lb compound Rebuilt into separate locomotives
Challenger Union Pacific 3985 ALCO 1936–43 Steam 4-6-6-4 485 t 6,200 horsepower (4,623 kW) Operates in excursion service; largest operational steam locomotive in 2007
GTEL 8500 'Big Blow' Union Pacific 1-30 (control cab), 1B-30B (turbine unit) General Electric 1958–61 Gas turbine-electric C-C+C-C 425 t 8,469 horsepower (6,315 kW) Over 10,000 hp at lower altitude and ambient temperatures. Two preserved in museums. Most powerful internal combustion locomotive built.
EMD DDA40X Union Pacific 6900-6947 Electro-Motive Division of General Motors 1969–71 Diesel-electric D-D 244 t 6,600 horsepower (4,922 kW) One operational, several in museums; largest operational single-unit diesel locomotive and the most powerful
SJ Dm3 Malmbanan ASEA 1953–71 Electric 1'D+D+D1' 273 t 9,655 horsepower (7,200 kW) Highest continuous tractive effort when built, most powerful locomotive using jackshafts
DB Class 103 1970–73 Electric Co'Co' 114 t 9,977 horsepower (7,440 kW)
060-EA Romanian Railways(CFR) 001-1000 Electroputere Craiova 1970-91 Electric Co'Co' 120 t 6,839 horsepower (5,100 kW) Most powerful locomotive in 1970s; highest continuous tractive effort
060-EA Softronic Phoenix version Romanian Railways (CFR) and Hungarian State Railways ( MÁV ) 001, 2001-2004 Softronic Craiova 2009–present Electric Co'Co' 120 t 8,851 horsepower (6,600 kW) Most powerful locomotive with highest continuous tractive effort
Softronic TransMONTANA (060-EA version) Romanian Railways (CFR) 1 Softronic Craiova 2010 Electric Co'Co' 120 t 10,997 horsepower (8,200 kW)
SBB-CFF-FFS Re 620 Gotthardbahn BBC 1972–80 Electric Bo'Bo'Bo' 120 t 10,527 horsepower (7,850 kW) Most powerful single-frame locomotive when built
JR Freight Class EF200 JR Freight Hitachi Ltd. 1990– Electric Bo'Bo'Bo' 100.8 t 8,046 horsepower (6,000 kW) Most powerful single-frame narrow-gauge locomotive in series production
EMD SD90MAC Union Pacific 8500-8561 Electro-Motive Diesel 1996–2002 Diesel-Electric C-C 210 t 6,300 horsepower (4,698 kW) Retired from service, some on lease with EMLX
GE AC6000CW Union Pacific; CSX Transportation; BHP Billiton 600-699, 5000-5016, 6070-6077, 7500-7579 (being overhauled and renumbered 69xx) General Electric 1996–2001 Diesel-Electric Co'Co' 210 t 6,250 horsepower (4,661 kW) Actual HP output on early production units is 4350 hp due to use of the 7FDL engine.
Indian locomotive class WAG-9 Indian Railways Chittaranjan Locomotive Works, India 1998 Electric Co'Co' 123 t 6,350 horsepower (4,735 kW) Most powerful electric locomotive in India in 2010.
China Railways HXN3 China Railways HXN30001-HXN30300 Dalian Locomotive, EMD 2008– Diesel-Electric Co'Co' 150 t 6,300 horsepower (4,698 kW) Most powerful diesel-electric locomotive in active production.
China Railways HXN5 China Railways HXN50001-HXN50300 GE, CSR Qishuyan Locomotive 2008– Diesel-Electric Co'Co' 150 t 6,250 horsepower (4,661 kW) Most powerful diesel-electric locomotive in active production.
China Railways HXD1 China Railways HXD10001-HXD10220 CSR Zhuzhou Electric Locomotive, Siemens 2006–08 Electric Bo'Bo'+Bo'Bo' 200 t 12,874 horsepower (9,600 kW)
China Railways HXD2 China Railways HXD20001-HXD20180 Datong Electric Locomotive, Alstom 2006–08 Electric Bo'Bo'+Bo'Bo' 200 t 13,410 horsepower (10,000 kW)
China Railways HXD3 China Railways HXD30001-HXD30890, HXD38001-38150 Toshiba, Dalian Locomotive 2006–09 Electric Co'Co' 150 t 9,655 horsepower (7,200 kW)
China Railways HXD1B China Railways HXD1B0001-HXD1B0500 CSR Zhuzhou Electric Locomotive, Siemens 2009– Electric Co'Co' 150 t 12,874 horsepower (9,600 kW) Most powerful single-frame locomotive in series production
China Railways HXD2B China Railways HXD2B0001-HXD2B0500 Datong Electric Locomotive, Alstom 2009– Electric Co'Co' 150 t 12,874 horsepower (9,600 kW) Most powerful single-frame locomotive in series production
China Railways HXD3B China Railways HXD3B0001-HXD3B0500 Dalian, Bombardier 2009– Electric Co'Co' 150 t 12,874 horsepower (9,600 kW) Most powerful single-frame locomotive in series production
China Railways HXD1C China Railways HXD1C0001-HXD1C0990 CSR Zhuzhou Electric Locomotive, Siemens 2009– Electric Co'Co' 150 t 9,655 horsepower (7,200 kW)
China Railways HXD2C China Railways HXD2C0001- Datong Electric Locomotive, Alstom 2010– Electric Co'Co' 150 t 9,655 horsepower (7,200 kW)
China Railways HXD3C China Railways HXD3C0001- Dalian, Bombardier 2010– Electric Co'Co' 150 t 9,655 horsepower (7,200 kW)
IORE Malmbanan IORE 101-IORE 126 Bombardier 2000–04 Electric Co'Co'+Co'Co' 360 t 14,483 horsepower (10,800 kW)
for a pair, possible to operate halves which is not usually done
Highest continuous tractive effort
Jawn Henry Norfolk and Western Railway (N&W) 2300 Baldwin Locomotive Works 1954-58 Steam Turbine Electric C+C-C+C 404 t 4,500 horsepower (3,356 kW)
Struck from the N&W roster on January 4, 1958
VL85 Russian Railways 270 Novocherkassk Electric Locomotive Plant 1983-94 Electric Bo'Bo'Bo'+Bo'Bo'Bo' 300 t 13,437 horsepower (10,020 kW)
WDG5 Indian Railways EMD / DLW 2012–present Diesel-Electric Transmission Bo-Bo-Bo 5500HP locomotive with 560KN tractive effort The most powerful diesel locomotive in India. A vision statement of IR suggests that up to 5,000 units of this class will be manufactured by 2020.
Union Pacific Coal GTEL Union Pacific 80 (later 8080) Union Pacific Omaha Shops 1961 Diesel-Electric + Gas Turbine-Electric A1A-A1A+2-D-D-2 728 t 7,000 horsepower (5,220 kW) (2000hp Diesel + 5000hp 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.
H220 Victorian Railways H Class Victorian Railways / [Newport Workshop] 1941–1958 220 PSI Steam Boiler, 3 Cylinder 4-8-4 265t 3,600 HP / 2,680KW coal fired steam locomotive (50 mph) with 245KN tractive effort. The most powerful steam locomotive, at the time built in, Australia. 1 Built. Preserved at Newport, Victoria