Catalogs
TorqueList Garage Reference Series

Volume 1 · Jeep

Engine
Reference Catalog

Factory specifications, architecture, key variants, engineering notes, racing history and the stories that made Jeep's most important engines matter.

Technical reference•Historical context•Builder notes•Print ready

Edition 1.0 · September 2026 · Published

Public preview · first 3 engine profiles unlocked

13

Detailed engine profiles

11/13

Commercially cleared photos

23

Source references

V1

13 engine families

Publication notice

Independent TorqueList reference

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© 2026 TorqueList. Original editorial text, compilation, selection, organization, layout, and TorqueList-created graphics are protected by copyright. Underlying facts, specifications, and manufacturer-identifying terms remain the property or factual subject matter of their respective owners.

Accuracy

Specifications can vary by model year, application, option code, market, and production revision. Verify critical service, purchasing, racing, and installation information against the exact factory documentation for the specific vehicle or engine before relying on it.

Media policy

Third-party photographs appear only when their commercial-use basis is recorded. Creator, source, and license information is retained with each approved image. Engines without an approved third-party photograph use TorqueList-owned original technical artwork.

Contents

Jeep Engine Reference — Volume 1

Profiles are organized by engine family and pull from the same published TorqueList Engine Library used by the web experience.

Willys Go-Devil

1 profiles
Jeep / Willys L134 Go-Devil1941–1954 core Jeep era
134.2 ci

Willys Hurricane

1 profiles
Jeep F134 Hurricane1950–1971
134.2 ci

Super Hurricane Six

1 profiles
Jeep 226 Super Hurricane1954–1963 Jeep/Willys use
226.2 ci

Kaiser Tornado

1 profiles
Jeep 230 Tornado OHC Six1962–1965 civilian Jeep era; 1967–1969 M715-family military use
230 ci

Perkins Diesel

1 profiles
Jeep Perkins 4.192 Diesel1961–1968 Jeep option
192.2 ci

Dauntless Buick V6

1 profiles
Jeep 225 Dauntless V61965½–1971 Jeep era
225 ci

Vigilante AMC V8

1 profiles
Jeep 327 Vigilante V81965–early 1968 Jeep use
327 ci

Dauntless Buick V8

1 profiles
Jeep 350 Dauntless V81968–1970 Jeep application era
350 ci

AMC 150 / Jeep 2.5

1 profiles
Jeep 2.5L AMC Inline-Four1984–2002
150.4 ci

PowerTech V8

1 profiles
Jeep 4.7L PowerTech V81999–2009 Jeep applications
287 ci

Pentastar V6

1 profiles
Jeep 3.6L Pentastar V62011–present Jeep era
219.9 ci

Gen III Hemi / Wrangler 392

1 profiles
Jeep Wrangler 6.4L Hemi 3922021–2026 Wrangler 392 era
392 ci

Supercharged Gen III Hemi

1 profiles
Jeep Grand Cherokee Trackhawk 6.2L Supercharged V82018–2021 Trackhawk era
376 ci
13/13 profiles include reference sources.
Every engine has artwork; rights-cleared real photos replace TorqueList original technical art as they are approved.
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01

TorqueList Technical Reference

Willys Go-Devil

Full web profile

Jeep / Willys L134 Go-Devil

The flathead four that powered the wartime Willys MB and became the foundation of early civilian Jeeps.

Jeep / Willys L134 Go-Devil engine

Jeep / Willys L134 Go-Devil enginePhoto: Greg Gjerdingen — CC BY 2.0 — via Wikimedia Commons · source · license

★

Why it matters

Key takeaway

The Go-Devil's power and durability were major reasons Willys won the U.S. military Jeep contract.

Engineering

Technical specification

Architecture
L-head inline four
Block
Cast iron
Cylinder heads
Cast iron
Valvetrain
Side-valve L-head
Aspiration
Naturally aspirated
Fuel delivery
Single-barrel carburetor
Firing order
1-3-4-2

The L134 Go-Devil used a compact 134.2-cubic-inch L-head inline-four with a long 4.375-inch stroke, low 6.48:1 compression, and simple side-valve construction. That layout sacrificed airflow for simplicity, low-speed torque, and reliability in military and early civilian Jeep service.

Factory fitment

Notable applications

Willys MBFord GPWCJ-2ACJ-3AM38

Strengths

  • Excellent low-speed torque
  • Simple rugged design
  • Huge historical importance

Watch-outs

  • Flathead breathing
  • Three-main-bearing crank
  • Low compression

Common upgrades

  • Electronic ignition
  • Higher-compression civilian head
  • Carburetor and cooling restoration

Builder notes

Engineering notes worth knowing

01

3.125 x 4.375-inch bore and stroke; 134.2 cu in / 2.2 L.

02

Side-valve L-head architecture with cast-iron block and head.

03

Factory output listed at 60 hp at 4,000 rpm and 105 lb-ft at 2,000 rpm.

04

Applications included Willys MB, Ford GPW, CJ-2A, CJ-3A, and M38.

History & context

The story behind the engine

The Go-Devil was the engine that powered the Jeep into history. Its modest horsepower was less important than the way it delivered usable torque, tolerated hard service, and fit the compact military vehicle package that became the template for generations of Jeeps.

Legacy

The L134 became inseparable from the World War II Jeep story and helped establish the mechanical identity of early civilian Jeeps. Its durable, simple design made it one of the most historically important four-cylinder engines in American vehicle history.

Verification

Reference sources

MotorTrend Jeep Encyclopedia — Go-Devil

technical history

TorqueList independent reference · Not an OEM publication or endorsement. Original TorqueList editorial and layout rights reserved.

02

TorqueList Technical Reference

Willys Hurricane

Full web profile

Jeep F134 Hurricane

The F-head evolution of the Go-Devil that powered CJs, military Jeeps, FCs, wagons and trucks.

Jeep F134 Hurricane engine

Jeep F134 Hurricane enginePhoto: CZmarlin — public domain — via Wikimedia Commons · source

★

Why it matters

Key takeaway

Moving the intake valves into the cylinder head improved airflow and compression while retaining the Go-Devil's familiar bottom-end dimensions.

Engineering

Technical specification

Architecture
F-head inline four
Block
Cast iron
Cylinder heads
Cast iron
Valvetrain
F-head / intake-over-exhaust
Aspiration
Naturally aspirated
Fuel delivery
Single-barrel carburetor

The F134 Hurricane kept the same 3.125-inch bore and 4.375-inch stroke as the Go-Devil but moved the intake valves into the cylinder head. The resulting F-head layout improved breathing and compression while preserving the rugged bottom-end dimensions of the earlier L134.

Factory fitment

Notable applications

CJ-3BCJ-5CJ-6M38A1FC-150Willys WagonWillys Pickup

Strengths

  • Better breathing than L134
  • Excellent off-road low-speed manners
  • Long production run

Watch-outs

  • Tall F-head package
  • Still modest highway power
  • Three-main-bearing architecture

Common upgrades

  • Electronic ignition
  • Carburetor tuning
  • Exhaust improvements

Builder notes

Engineering notes worth knowing

01

134.2 cu in / 2.2 L with 3.125 x 4.375-inch bore and stroke.

02

F-head intake-over-exhaust valvetrain with cast-iron block and head.

03

Common Jeep ratings were about 72–75 hp gross and 112–114 lb-ft.

04

Used in CJ-3B, CJ-5, CJ-6, M38A1, FC-150, Willys Wagon, and Willys Pickup.

History & context

The story behind the engine

Jeep needed more breathing and power without abandoning the proven dimensions of the Go-Devil family. The Hurricane answered by moving the intake valves overhead, creating a taller but more efficient engine that stayed in Jeep service for more than two decades.

Legacy

The F134 carried Jeep’s original four-cylinder lineage deep into the CJ era. Its long production run and broad use across civilian, military, and Forward Control models made it one of the foundational engines of postwar Jeep history.

Verification

Reference sources

JeepTech F134 specifications

technical reference

TorqueList independent reference · Not an OEM publication or endorsement. Original TorqueList editorial and layout rights reserved.

03

TorqueList Technical Reference

Super Hurricane Six

Full web profile

Jeep 226 Super Hurricane

The Continental-derived flathead six that gave Willys wagons, pickups and FC trucks heavy-duty torque.

Jeep 226 Super Hurricane engine

Jeep 226 Super Hurricane enginePhoto: Public domain — via Wikimedia Commons · source

★

Why it matters

Key takeaway

The 226 provided Willys utility vehicles with substantially more torque than the four-cylinder engines.

Engineering

Technical specification

Architecture
L-head inline six
Block
Cast iron
Cylinder heads
Cast iron
Valvetrain
Side-valve L-head
Aspiration
Naturally aspirated
Fuel delivery
Carter one-barrel carburetor
Main bearings
4

The 226 Super Hurricane was a large L-head inline-six with a 4.375-inch stroke and 226.2 cubic inches. Its long-stroke geometry and flathead layout emphasized low-rpm torque and smooth utility-vehicle operation rather than high-speed breathing.

Factory fitment

Notable applications

Willys PickupWillys WagonForward Control trucks

Strengths

  • 190 lb-ft low-speed torque
  • Simple rugged construction
  • Good heavy-vehicle manners

Watch-outs

  • Flathead airflow
  • Very long stroke
  • Heavy

Common upgrades

  • Electronic ignition
  • Carburetor restoration
  • Cooling upgrades

Builder notes

Engineering notes worth knowing

01

3.3125 x 4.375-inch bore and stroke; 226.2 cu in / 3.7 L.

02

Cast-iron L-head inline-six using a single-barrel carburetor.

03

Rated around 115 hp gross early, with about 190 lb-ft of torque.

04

Used in Willys pickups, Wagons, and Forward Control trucks.

History & context

The story behind the engine

For heavier Willys and Jeep utility vehicles, the four-cylinder engines were not always enough. The Super Hurricane brought six-cylinder torque to pickups, wagons, and Forward Control models, giving those vehicles a stronger work-oriented personality.

Legacy

The 226 filled an important gap between Jeep’s small four-cylinders and later overhead-valve and overhead-cam sixes. It represents the last phase of large flathead six-cylinder power in Jeep utility vehicles.

Verification

Reference sources

JeepTech Super Hurricane 226 specifications

technical reference

TorqueList independent reference · Not an OEM publication or endorsement. Original TorqueList editorial and layout rights reserved.

End of public preview

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All-manufacturer workshop tools

Jeep Workshop Companion

Builder utilities and edition 2.0 reference sections. Calculations use your entered measurements; empty or unverified interchange, machining, power and torque data are never represented as confirmed specifications.

Public preview: workshop reference content remains limited until this volume is unlocked. The compression calculator is a general educational utility.

Engine geometry & static compression

Starting values are examples only, not specifications for any engine. Use measured dimensions. Dish and valve relief add clearance volume; dome subtracts it. Deck means piston below deck at top dead center. Calculations are for one cylinder except total displacement.

Geometry
Compression inputs

Static compression

9.63:1

Displacement

349.8 ci

Displacement

5.733 L

Mean piston speed

3,480 ft/min

Rod-to-stroke ratio

1.638

Clearance volume

83.02 cc / cyl

Static compression = (swept + clearance) ÷ clearance. Mean piston speed = 2 × stroke (feet) × RPM. These calculations do not predict fuel octane, dynamic compression, safe RPM, engine strength, horsepower, or whether a combination will clear mechanically.

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Attribution record

Image & License Credits

Only photographs recorded as approved for commercial use appear in this edition. TorqueList does not claim ownership of third-party photographs; all fallback technical artwork is TorqueList-created original material.

Jeep / Willys L134 Go-Devil

Greg Gjerdingen — CC BY 2.0 — via Wikimedia Commons

CC BY 2.0

Source: https://commons.wikimedia.org/wiki/File:1940_Jeep_%22Go-Devil%22_Engine_(30935474814).jpg

License: https://creativecommons.org/licenses/by/2.0/

Jeep F134 Hurricane

CZmarlin — public domain — via Wikimedia Commons

Public domain

Source: https://commons.wikimedia.org/wiki/File:Jeep_M170_Ambulance_el.jpg

Jeep 226 Super Hurricane

Public domain — via Wikimedia Commons

Public domain

Source: https://commons.wikimedia.org/wiki/File:Motorkaisercarabela.jpg

TorqueList is an independent automotive reference publication and is not affiliated with, sponsored by, endorsed by, or authorized by Jeep, Stellantis, or any other vehicle or engine manufacturer.