Engines
By engine family: the four Cummins engines in Dodge and Ram pickups first, then the families used in other pickups, trucks, buses and RV chassis.
01Dodge & Ram pickups
ENG-01
5.9L Cummins 12-valve (6BT)
1989–1998
Mechanical injection, two valves per cylinder, and the reputation that started it all.
Open spec sheet →ENG-025.9L Cummins 24-valve ISB (VP44)
1998.5–2002
Four valves per cylinder and the electronically controlled Bosch VP44.
Open spec sheet →ENG-035.9L Cummins common-rail ISB (CP3)
2003–2007
Electronic injectors, the Bosch CP3, and no EGR.
Open spec sheet →ENG-046.7L Cummins (ISB 6.7)
2007.5-present
Bigger bore and stroke, variable-geometry turbo, and modern emissions hardware.
Open spec sheet →Ram engines side by side
| Engine | Years | Displacement | Valves | Injection | Turbo family | Factory pickup ratings |
|---|---|---|---|---|---|---|
| 5.9 12-valve | 1989–1998 | 5.9 L / 359 ci | 12 (2 per cyl.) | Bosch VE rotary (1989–1993); Bosch P7100 inline (1994–1998) | Holset H1C; WH1C (1994); HX35W (1995–1998) | 160 hp / 400 lb‑ft to 215 hp / 440 lb‑ft |
| 5.9 24-valve | 1998.5–2002 | 5.9 L / 359 ci | 24 (4 per cyl.) | Bosch VP44 electronic rotary | Holset HX35W / HY35W (wastegated) | 215 hp / 420 lb‑ft to 245 hp / 505 lb‑ft |
| 5.9 common-rail | 2003–2007 | 5.9 L / 359 ci | 24 (4 per cyl.) | Bosch high-pressure common rail, CP3 pump | Holset HE341CW / HE351CW (wastegated) | 235 hp / 460 lb‑ft to 325 hp / 610 lb‑ft |
| 6.7 | 2007.5-present | 6.7 L / 408 ci | 24 (4 per cyl.) | Bosch high-pressure common rail (pump changes by year) | Holset HE351VE / HE300VG (VGT) | 350 hp / 610 lb‑ft to 430 hp / 1,075 lb‑ft |
02Other Cummins engine families
Light duty
ISV5.0 V8
2016–2019
- Displacement
- 5.0 L
- Titan XD rating
- 310 hp / 555 lb‑ft
- Emissions
- DPF + SCR (DEF)
R2.8 / ISF2.8
2017-present (R2.8)
- Displacement
- 2.8 L (171 cu in)
- R2.8 rating
- 161 hp / 310 lb‑ft
- Emissions
- Cooled EGR + DOC, no SCR
ISB / B6.7 (commercial)
1998-present
- Displacement
- 5.9 L, then 6.7 L
- 2017-on ratings
- 200–325 hp / 520–750 lb‑ft
- Emissions
- EGR + DPF + SCR (2010-on)
ISC / ISL / L9
1998-present
- Displacement
- 8.3 L (ISC), 8.9 L (ISL / L9)
- 2024 L9 ratings
- 260–380 hp / 860–1,250 lb‑ft
- Emissions
- EGR + DPF + SCR (2010-on)
ISX / X15 / X12
1998-present
- Displacement
- 10.8 L (ISM), 11.9 L (ISX11.9/12), 15 L (ISX15/X15)
- X15 ratings
- 400–605 hp / 1,450–2,050 lb‑ft
- Emissions
- EGR + DPF + SCR (2010-on)
All families side by side
"Typical ratings" are the current or representative ranges from each page; the family pages show years, sources and where sources disagree.
| Engine | Segment | Years | Displacement | Fuel system | Typical ratings |
|---|---|---|---|---|---|
| 5.9 12-valve | Ram pickup | 1989–1998 | 5.9 L / 359 ci | Bosch VE rotary (1989–1993); Bosch P7100 inline (1994–1998) | 160 hp / 400 lb‑ft to 215 hp / 440 lb‑ft |
| 5.9 24-valve | Ram pickup | 1998.5–2002 | 5.9 L / 359 ci | Bosch VP44 electronic rotary | 215 hp / 420 lb‑ft to 245 hp / 505 lb‑ft |
| 5.9 common-rail | Ram pickup | 2003–2007 | 5.9 L / 359 ci | Bosch high-pressure common rail, CP3 pump | 235 hp / 460 lb‑ft to 325 hp / 610 lb‑ft |
| 6.7 | Ram pickup | 2007.5-present | 6.7 L / 408 ci | Bosch high-pressure common rail (pump changes by year) | 350 hp / 610 lb‑ft to 430 hp / 1,075 lb‑ft |
| ISV5.0 V8 | Light duty | 2016–2019 | 5.0 L | Bosch high-pressure common rail | 310 hp / 555 lb‑ft |
| R2.8 / ISF2.8 | Light duty | 2017-present (R2.8) | 2.8 L (171 cu in) | Bosch common rail | 161 hp / 310 lb‑ft |
| ISB / B6.7 (commercial) | MidRange | 1998-present | 5.9 L, then 6.7 L | High-pressure common rail (6.7) | 200–325 hp / 520–750 lb‑ft |
| ISC / ISL / L9 | MidRange | 1998-present | 8.3 L (ISC), 8.9 L (ISL / L9) | CAPS at ISL launch; XPI common rail from 2010 | 260–380 hp / 860–1,250 lb‑ft |
| ISX / X15 / X12 | Heavy duty | 1998-present | 10.8 L (ISM), 11.9 L (ISX11.9/12), 15 L (ISX15/X15) | XPI common rail from 2010 | 400–605 hp / 1,450–2,050 lb‑ft |