Ram / Dodge 2500 · ¾-Ton
1989–1993 · Dodge D250/W250
Engine: Cummins 6BT 5.9L 12-valve
160 hp · 400 lb-ft
2WD / 4WD · 5-speed manual (Getrag G360), 3-speed automatic (A727)
Cummins debuted in 1989 as an option on 250/350 models above 8,500 lb GVWR. 160 hp / 400 lb-ft is the figure given for the automatic. D = 2WD, W = 4WD. A727 automatic and 5-speed manual confirmed; later A518 use in this era unconfirmed. The 1993 Dodge Trucks brochure confirms the 1993 rating for the Cummins Intercooled Turbo Diesel: 160 hp @ 2,500 rpm and 400 lb-ft @ 1,700 rpm.
1994 · Dodge Ram 2500
Engine: Cummins 6BT 5.9L 12-valve
175 hp · 420 lb-ft
2WD / 4WD · 5-speed manual (NV4500), 4-speed automatic (46RH/47RH/47RE)
Highest rating shown (manual): 175 hp / 420 lb-ft @ 1,600 rpm; automatic 160 hp @ 2,500 rpm / 400 lb-ft @ 1,500 rpm. Confirmed by Dodge's own 1994 Ram Pickup brochure. New Ram body style from 1994. Wikipedia gives an overall 160-230 hp range across the engine's whole run, not a 1994 figure.
1995 · Dodge Ram 2500
Engine: Cummins 6BT 5.9L 12-valve
175 hp · 430 lb-ft
2WD / 4WD · 5-speed manual (NV4500), 4-speed automatic (46RH/47RH/47RE)
Highest rating shown (manual): 175 hp @ 2,500 rpm / 430 lb-ft @ 1,600 rpm; automatic 160 hp @ 2,500 rpm / 400 lb-ft @ 1,500 rpm. Confirmed by Dodge's own 1995 Ram Pickup brochure, which shows a 10 lb-ft torque increase on the manual over 1994 (420 to 430 lb-ft); the automatic rating is unchanged. Wikipedia gives an overall 160-230 hp range across the engine's whole run, not a 1995 figure.
1996–1998 · Dodge Ram 2500
Engine: Cummins 6BT 5.9L 12-valve
215 hp · 440 lb-ft
2WD / 4WD · 5-speed manual (NV4500), 4-speed automatic (46RH/47RH/47RE)
Highest rating shown (manual): 215 hp / 440 lb-ft; automatic 180 hp / 420 lb-ft. The 1996 Dodge Trucks brochure's Power Trains table confirms these for 1996: the 5.9L Cummins Intercooled Turbo Diesel at 215 hp @ 2,600 rpm and 440 lb-ft @ 1,600 rpm with the manual, and 180 hp @ 2,500 / 420 lb-ft @ 1,500 with the automatic, federal ratings. Its footnote says the automatic's figures would also be used for the manual in California from January 1996. Wikipedia's 160-230 hp is an overall range across the engine's whole run, not a 1996 figure. The 1997 Dodge Trucks brochure's engine curves show the same figures for 1997 (manual 215 hp / 440 lb-ft, automatic 180 hp / 420 lb-ft). 1998 rests on secondary sources (DieselHub and others) that agree with the brochures; the 12-valve gave way to the 24-valve partway through 1998. New Ram body style from 1994. The 24-valve engine replaced this one partway through 1998.
1998–2000 · Dodge Ram 2500
Engine: Cummins ISB 5.9L 24-valve
235 hp · 460 lb-ft
2WD / 4WD · 5-speed manual (NV4500), 4-speed automatic (46RH/47RH/47RE)
Highest rating shown (manual): 235 hp / 460 lb-ft; automatic 215 hp / 420 lb-ft. 24-valve ISB began partway through 1998, overlapping the last 12-valve trucks.
2001–2002 · Dodge Ram 2500
Engine: Cummins ISB 5.9L 24-valve
245 hp · 505 lb-ft
2WD / 4WD · 5-speed manual (NV4500), 4-speed automatic (46RH/47RH/47RE)
Highest rating shown: high-output (manual only) 245 hp / 505 lb-ft; standard 235 hp / 460 lb-ft. 24-valve ISB began partway through 1998, overlapping the last 12-valve trucks. Confirmed by Dodge's own 2001 Ram brochure, which states the Cummins High-Output produces 245 hp @ 2,700 rpm and 505 lb-ft @ 1,600 rpm.
2003 · Dodge Ram 2500
Engine: Cummins ISB 5.9L 24-valve
305 hp · 555 lb-ft
2WD / 4WD · 4-speed automatic (47RE), 6-speed manual (NV5600)
Rating 305 hp / 555 lb-ft (Wikipedia, Diesel Power Products, Pure Diesel Power); Diesel Resource lists 550 lb-ft for manuals and lower-rated 235 hp / 460 lb-ft versions. Redesigned Ram in 2003. Transmissions per Pure Diesel Power: 47RE automatic, NV5600 6-speed manual. Drivetrain availability by weight class unverified.
2004 · Dodge Ram 2500
Engine: Cummins ISB 5.9L 24-valve
325 hp · 600 lb-ft
2WD / 4WD · 4-speed automatic (47RE), 6-speed manual (NV5600)
Highest rating shown: the 'Cummins 600' high-output 325 hp / 600 lb-ft, introduced midway through the 2004 model year (Wikipedia, Diesel Power Products, Pure Diesel Power); earlier 2004 trucks kept 305 hp / 555 lb-ft. Diesel Resource lists the 2004 high-output at 325 hp / 600 lb-ft. Drivetrain availability by weight class unverified.
2005–2007 · Dodge Ram 2500
Engine: Cummins ISB 5.9L 24-valve
325 hp · 610 lb-ft
2WD / 4WD · 6-speed manual (G56), 4-speed automatic (48RE)
Rating 325 hp / 610 lb-ft (Pure Diesel Power, Diesel Resource, DieselHub); Wikipedia's B Series page lists 600 lb-ft. The 48RE automatic replaced the 47RE by 2006 per one source. The 6.7-liter engine replaced this one partway through 2007. Drivetrain availability by weight class unverified.
2007–2009 · Dodge Ram 2500
Engine: Cummins ISB 6.7L
350 hp · 650 lb-ft
2WD / 4WD · 6-speed manual (G56), 6-speed automatic (68RFE)
6.7-liter engine began partway through 2007. Rated 350 hp; 650 lb-ft with the automatic, 610 lb-ft with the manual. 3500 cab-and-chassis trucks reportedly got a lower 305 hp / 610 lb-ft rating. Drivetrain availability unverified. Confirmed by Dodge's own 2008 Ram brochure: 350 hp @ 3,000 rpm / 650 lb-ft @ 1,500 rpm with the 6-speed automatic, 350 hp @ 3,013 rpm / 610 lb-ft @ 1,400 rpm with the 6-speed manual.
2010 · Ram 2500
Engine: Cummins ISB 6.7L
350 hp · 650 lb-ft
2WD / 4WD · 6-speed manual (G56), 6-speed automatic (68RFE)
Rating 350 hp / 650 lb-ft with the automatic; one source lists the manual at 350 hp / 610 lb-ft. Shares the automatic rating with 2007-2009. Fourth generation 2010-2018, fifth generation from 2019. Sources disagree on the Dodge-to-Ram brand change (2010 vs 2011 model year). Drivetrain availability unverified. Confirmed by Dodge's own 2008 Ram brochure: 350 hp @ 3,000 rpm / 650 lb-ft @ 1,500 rpm with the 6-speed automatic, 350 hp @ 3,013 rpm / 610 lb-ft @ 1,400 rpm with the 6-speed manual.
2011–2012 · Ram 2500
Engine: Cummins ISB 6.7L
350 hp · 800 lb-ft
2WD / 4WD · 6-speed manual (G56), 6-speed automatic (68RFE)
Rating 350 hp / 800 lb-ft with the automatic (manual 350 hp / 610 lb-ft per one source). Fourth generation 2010-2018, fifth generation from 2019. Sources disagree on the Dodge-to-Ram brand change (2010 vs 2011 model year). Drivetrain availability unverified.
2013–2014 · Ram 2500
Engine: Cummins ISB 6.7L
370 hp · 800 lb-ft
2WD / 4WD · 6-speed manual (G56), 6-speed automatic (68RFE)
The 2500 lacked the high-output Aisin combination in the sources found; 68RFE automatic 370 hp / 800 lb-ft (Diesel Resource, secondary source). Fourth generation 2010-2018, fifth generation from 2019. Sources disagree on the Dodge-to-Ram brand change (2010 vs 2011 model year). Drivetrain availability unverified.
2015 · Ram 2500
Engine: Cummins ISB 6.7L
370 hp · 800 lb-ft
2WD / 4WD · 6-speed manual (G56), 6-speed automatic (68RFE)
The 2500 lacked the high-output Aisin combination in the sources found; 68RFE automatic 370 hp / 800 lb-ft (Diesel Resource, secondary source). Fourth generation 2010-2018, fifth generation from 2019. Sources disagree on the Dodge-to-Ram brand change (2010 vs 2011 model year). Drivetrain availability unverified.
2016–2017 · Ram 2500
Engine: Cummins ISB 6.7L
370 hp · 800 lb-ft
2WD / 4WD · 6-speed manual (G56), 6-speed automatic (68RFE)
The 2500 lacked the high-output Aisin combination in the sources found; 68RFE automatic 370 hp / 800 lb-ft (Diesel Resource, secondary source). Fourth generation 2010-2018, fifth generation from 2019. Sources disagree on the Dodge-to-Ram brand change (2010 vs 2011 model year). Drivetrain availability unverified.
2018 · Ram 2500
Engine: Cummins ISB 6.7L
370 hp · 800 lb-ft
2WD / 4WD · 6-speed manual (G56), 6-speed automatic (68RFE)
The 2500 lacked the high-output Aisin combination in the sources found; 68RFE automatic 370 hp / 800 lb-ft (Diesel Resource, secondary source). Fourth generation 2010-2018, fifth generation from 2019. Sources disagree on the Dodge-to-Ram brand change (2010 vs 2011 model year). Drivetrain availability unverified.
2019–2020 · Ram 2500
Engine: Cummins ISB 6.7L
400 hp · 1000 lb-ft
2WD / 4WD · 6-speed automatic (68RFE), 6-speed automatic (Aisin AS69RC)
High-output rating 400 hp / 1,000 lb-ft with the Aisin AS69RC automatic (Wikipedia); standard output 370 hp / 850 lb-ft with the 68RFE. Fourth generation 2010-2018, fifth generation from 2019. Sources disagree on the Dodge-to-Ram brand change (2010 vs 2011 model year). Drivetrain availability unverified. The high-output rating may apply only to some 3500 trims; the 2500 may be rated lower.
2021–2024 · Ram 2500
Engine: Cummins ISB 6.7L
420 hp · 1075 lb-ft
2WD / 4WD · 6-speed automatic (68RFE), 6-speed automatic (Aisin AS69RC)
High-output rating 420 hp / 1,075 lb-ft with the Aisin AS69RC automatic (Wikipedia); standard output 370 hp / 850 lb-ft with the 68RFE. Chassis cabs may be rated slightly lower. Fourth generation 2010-2018, fifth generation from 2019. Sources disagree on the Dodge-to-Ram brand change (2010 vs 2011 model year). Drivetrain availability unverified. The high-output rating may apply only to some 3500 trims; the 2500 may be rated lower.
2025–2026 · Ram 2500
Engine: Cummins ISB 6.7L
430 hp · 1075 lb-ft
2WD / 4WD · 8-speed automatic (ZF 8AP1075)
Rating 430 hp / 1,075 lb-ft with the 8-speed TorqueFlite HD (ZF) automatic (Stellantis 2025 press release, which lists only the high-output diesel; a 2026 Rebel review repeats the figures). Fourth generation 2010-2018, fifth generation from 2019. Sources disagree on the Dodge-to-Ram brand change (2010 vs 2011 model year). Drivetrain availability unverified.