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List of United States Army tactical truck engines

(Redirected from US Army tactical truck engines)

In the late 1930s the US Army began setting requirements for custom built tactical trucks, winning designs would be built in quantity. As demand increased during WWII some standardized designs were built by other manufactures.

Most trucks had gasoline (G) engines until the early 1960s, when multifuel (M) and diesel (D) engines were introduced. Since then diesel fuel has increasingly been used, the last gasoline engine vehicles were built in 1985.

Most engines have been water-cooled with inline (I) cylinders, but V types (V) and opposed (O) engines have also been used. Three air-cooled engines were used in two very light trucks. Gasoline engines up to WWII were often valve in block design (L-head), during the war more overhead valve (ohv) engines were used, and after the war all new engines (except 1 F-head and 1 Overhead camshaft (ohc)) have been ohv. All diesel engines have ohv, they can be naturally aspired, supercharged (SC), or turbocharged (TC).

The same engines have been used in different trucks, and larger trucks often have had different engines during their service life. Because of application and evolution, the same engine often has different power ratings. Ratings are in SAE gross horsepower.

The front of an engine is the fan end, the rear is the flywheel end, right and left are as viewed from the rear, regardless of how the engine is mounted in the vehicle. Engines in the tables are water-cooled and naturally aspirated unless noted.

AM General/Kaiser Jeep/Willys

ModelDisplacementFuelTypePowerTorqueUsed in
AO-42[a]53 cu in (0.9 L)GAC O416 hp (12 kW) @3200rpm30 lbf⋅ft (41 N⋅m) @2100rpmM274 1⁄2-ton 4x4 "Mule"
AV-108-4108 cu in (1.8 L)GAC V454 hp (40 kW)
@3600rpm		90 lbf⋅ft (122 N⋅m) @2500rpmM422 1⁄4 4x4 "Mity Mite"
MB134 cu in (2.2 L)GI454 hp (40 kW) @4000rpm105 lbf⋅ft (142 N⋅m)Willys MB/Ford GPW 1⁄4-ton 4x4 "Jeep"
MD134 cu in (2.2 L)GI472 hp (54 kW) @4000rpm114 lbf⋅ft (155 N⋅m) @2000rpmM38A11⁄4-ton 4x4
Tornado230 cu in (3.8 L)GI6132 hp (98 kW)
@4000		198 lbf⋅ft (268 N⋅m)
@2000rpm		M715 1+1⁄4-ton 4x4
  • Kaiser-Jeep Tornado
    (front cutaway)
  • Willys AO4-53
  • American Motors AV-108-4
    (left rear)
  • American Motors AV-108-4
    (right front)
  • Willys MB
    (front cutaway)
  • Willys MB
    (left side cutaway)
  • Willys MD
    (left front)
  • Willys MD
    (right rear)

Caterpillar

ModelDisplacementFuelTypePowerTorqueUsed in
3116[1]403 cu in (6.6 L)DTC I6225 hp (168 kW)430 lbf⋅ft (583 N⋅m) @1550rpmM35A3 2+1⁄2-ton 6x6, Family of Medium Tactical Vehicles
C7439 cu in (7.2 L)DTC I6330 hp (246 kW) @2400rpm860 lbf⋅ft (1,166 N⋅m) @1400rpmFamily of Medium Tactical Vehicles
C15928 cu in (15.2 L)DTC I6515 hp (384 kW) @1800rpm1,650 lbf⋅ft (2,237 N⋅m)
@1200rpm		M977 (HEMTT), M1074/M1075 (PLS)
C181,106 cu in (18.1 L)DTC I6700 hp (522 kW) @1300rpm1,900 lbf⋅ft (2,576 N⋅m) @1400M1070A1 (HET)
  • Caterpillar 3116 (left front)
  • Caterpillar 3116 (right rear)
  • Caterpillar C15

Chevrolet – GMC

ModelDisplacementFuelTypePowerTorqueUsed in
6.2L/6.5L[2]400 cu in (6.6 L)DV8160 hp (119 kW) @3400rpm240 lbf⋅ft (325 N⋅m) @2000rpmM1008 1+1⁄4-ton 4x4 (CUCV), M998 1+1⁄4-ton 4x4 (HMMWV)
270270 cu in (4.4 L)GI691 hp (68 kW) @2750rpm216 lbf⋅ft (293 N⋅m) @1400rpmGMC CCKW 21⁄2-ton 6x6, DUKW 21⁄2-ton 6x6 amphibian
302302 cu in (4.9 L)GI6130 hp (97 kW) @3200rpm262 lbf⋅ft (355 N⋅m) @1200rpmM135 21⁄2-ton 6x6
BV-1001235 cu in (3.9 L)GI683 hp (62 kW) @3100rpm184 lbf⋅ft (249 N⋅m) @1000rpmChev. G506 1+1⁄2-ton 4x4
  • Chevrolet 6.2/6.5L
  • GMC 302
    (left front)
  • GMC 302
    (right front)
  • Chevrolet BV-1001
    (left side)
  • Chevrolet BV-1001
    (right side)

Continental

ModelDisplacementFuelTypePowerTorqueUsed in
AO42[a]42 cu in (0.7 L)GAC O213 hp (10 kW) @3000rpm26 lbf⋅ft (35 N⋅m) @2300rpmM274 1⁄2-ton 4x4 "Mule"
L-142[b][3]1,412 cu in (23.1 L)GI465 hp (48 kW) @4000rpm128 lbf⋅ft (174 N⋅m) @1800rpmM1511⁄4-ton 4x4
LDT465[b][4]478 cu in (7.8 L)MTC I6130 hp (97 kW)305 lbf⋅ft (414 N⋅m)M35 21⁄2-ton 6x6, M54 5-ton 6x6, M656 5-ton 8x8
R22501 cu in (8.2 L)GI6145 hp (108 kW)
@2400rpm		372 lbf⋅ft (504 N⋅m)
@1200rpm		M1 10-ton 6x6 Wrecker
R6602602 cu in (9.9 L)GI6224 hp (167 kW)
@2800rpm		504 lbf⋅ft (683 N⋅m)
@1200rpm		M54 5-ton 6x6
  • Ordnance design L-142
  • Ordnance design LDT-465
    (left front)
  • Ordnance design LDT-465
    (right rear)
  • Continental R22
    (left side)
  • Continental R22
    (right side)
  • Continental R6602
    (left side)
  • Continental R6602
    (right side)

Cummins

ModelDisplacementFuelTypePowerTorqueUsed in
6CTA8.3[5]504 cu in (8.3 L)DTC I6240 hp (179 kW) @2100rpm745 lbf⋅ft (1,010 N⋅m) @1500rpmM939 5-ton 6x6
NH250[6]855 cu in (14.0 L)DI6240 hp (179 kW) @2100rpm685 lbf⋅ft (929 N⋅m) @1500rpmM809 5-ton 6x6), M939 5-ton 6x6
NTC400[7]855 cu in (14.0 L)DTC I6400 hp (298 kW) @2100rpm1,150 lbf⋅ft (1,559 N⋅m) @1500rpmM915 series 6x4, 6x6, 8x6
V8-300[8]785 cu in (12.9 L)DV8300 hp (224 kW)
@3000rpm		580 lbf⋅ft (786 N⋅m)
@2100rpm		M123/125 10-ton 6x6
  • Cummins 6CTA8.3
    (left side)
  • Cummins 6CTA8.3
    (right side)
  • Cummins NH250
    (left front)
  • Cummins NH250
    (right rear)
  • Cummins V8-300
    (left front)
  • Cummins V8-300
    (right rear)

Detroit Diesel

ModelDisplacementFuelTypePowerTorqueUsed in
3-53159 cu in (2.6 L)DSC I3103 hp (77 kW) @2800rpm217 lbf⋅ft (294 N⋅m) @1500rpmM561 1+1⁄2-ton 6x6 "Gamma-goat"
Series 60775 cu in (12.7 L)DTC I6400 hp (298 kW) @2100rpm1,400 lbf⋅ft (1,898 N⋅m) @1200rpmM915 series 6x4, 6x6, 8x6
8V92TA[9]736 cu in (12.1 L)DTC V8450 hp (336 kW)1,330 lbf⋅ft (1,803 N⋅m) @1200rpmM911(C-HET) M977(HEMTT), M1070(HET)
12V71852 cu in (14.0 L)DSC V12600 hp (447 kW) @2500rpm1,470 lbf⋅ft (1,993 N⋅m) @16000rpmM746 22+1⁄2-ton 8x8 (HET)
  • Detroit Diesel 8V92TA
  • Detroit Diesel Series 60 (left front)
  • Detroit Diesel Series 60 (right rear)

Dodge-Fargo

ModelDisplacementFuelTypePowerTorqueUsed in
T-202201 cu in (3.3 L)GI679 hp (59 kW) @3000rpmVC 1⁄2-ton 4x4
T-214-245230 cu in (3.8 L)GI692 hp (69 kW)
@3200		180 lbf⋅ft (244 N⋅m)
@1200rpm		Dodge WC 3⁄4-ton 4x4, M37 3⁄4-ton 4x4
318[10]318 cu in (5.2 L)GV8150 hp (112 kW) @4000rpm230 lbf⋅ft (312 N⋅m) @2400rpmM880 1+1⁄4-ton 4x4 (CUCV)
  • Dodge T214 (left side)
  • Dodge T214 (right side)
  • Dodge 318

Ford

ModelDisplacementFuelTypePowerTorqueUsed in
GTB226 cu in (3.7 L)GI690 hp (67 kW) @3000rpm180 lbf⋅ft (244 N⋅m) @1200rpm1+1⁄2-ton 4x4
  • Ford GTB (left side)
  • Ford GTB (right side)

Hall-Scott

ModelDisplacementFuelTypePowerTorqueUsed in
4401,090 cu in (17.9 L)GI6240 hp (179 kW) @2000rpm810 lbf⋅ft (1,098 N⋅m) @1200rpmM25 Tank Transporter
  • Hall-Scott 440 (left side)
  • Hall-Scott 440 (right side)

Hercules

ModelDisplacementFuelTypePowerTorqueUsed in
DFXE895 cu in (14.7 L)DI6185 hp (138 kW) @1600rpm665 lbf⋅ft (902 N⋅m) @1200rpmM19 Tank Transporter
HXDdisp855 cu in (14.0 L)GI6202 hp (151 kW) @2150rpm642 lbf⋅ft (870 N⋅m) @900rpm6-ton 6x6)
JXD320 cu in (5.2 L)GI687 hp (65 kW) @2400rpm228 lbf⋅ft (309 N⋅m) @1200rpmUS6 21⁄2-ton 6x6
L-142[b][3]1,412 cu in (23.1 L)GI465 hp (48 kW) @4000rpm128 lbf⋅ft (174 N⋅m) @1800rpmM1511⁄4-ton 4x4
LDT465[b][4]478 cu in (7.8 L)MTC I6130 hp (97 kW)305 lbf⋅ft (414 N⋅m)M35 21⁄2-ton 6x6, M54 5-ton 6x6, M656 5-ton 8x8
RXC529 cu in (8.7 L)GI6131 hp (98 kW) @2200369 lbf⋅ft (500 N⋅m) @1000rpmDiamond T 4-ton 6x6, Autocar U8144T 5-/6-ton 4x4
  • Hercules DFXE (left side)
  • Hercules DFXE (right side)
  • Hercules HXD (left front)
  • Hercules HXD (right front)
  • Hercules JXD (left side)
  • Hercules JXD (right side)
  • Hercules L-142
  • Ordnance design LDT-465
    (left front)
  • Ordnance design LDT-465
    (right rear)
  • Hercules RXC (left side)
  • Hercules RXC (right side)

International Harvester

ModelDisplacementFuelTypePowerTorqueUsed in
GRD-214214 cu in (3.5 L)GI685 hp (63 kW) @3400rpm160 lbf⋅ft (217 N⋅m) @1200IHC M-1-4 1⁄2-ton 4x4
GRD-233233 cu in (3.8 L)GI693 hp (69 kW) @3400181 lbf⋅ft (245 N⋅m) @800IHC M-1-4 1⁄2-ton 4x4, IHC M-5-6 1+1⁄2-ton 6x6
  • International RED-450-D

LeRoi

ModelDisplacementFuelTypePowerTorqueUsed in
T-H844844 cu in (13.8 L)GV8297 hp (221 kW) @2600rpm725 lbf⋅ft (983 N⋅m) @1700rpmM123/25 10-ton 6x6
  • LeRoi T-H844 (left rear)
  • LeRoi T-H844 (right front)

Mack

ModelDisplacementFuelTypePowerTorqueUsed
EN532532 cu in (8.7 L)GI6136 hp (101 kW) @2400rpmMack NJU 5-ton 6x6
EY707 cu in (11.6 L)GI6159 hp (119 kW) @2100rpm530 lbf⋅ft (719 N⋅m) @800rpmMack NM-6 6-ton 6x6, Mack NO 7+1⁄2-ton 6x6
ENDT673672 cu in (11.0 L)DTC I6211 hp (157 kW) @2100rpm610 lbf⋅ft (827 N⋅m)M54 5-ton 6x6)
  • Mack ENDT673 (left side)
  • Mack ENDT673 (right side)
  • Mack EY

REO

ModelDisplacementFuelTypePowerTorqueUsed in
OA-331331 cu in (5.4 L)GI6146 hp (109 kW) @3400rpm330 lbf⋅ft (447 N⋅m)M35 21⁄2-ton 6x6
  • REO OA331 (left side)
  • REO OA331 (right side)

Notes

References

Works cited

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