Compare/Allis Chalmers 4W-305 vs Allis Chalmers HD21

Allis Chalmers 4W-305 vs Allis Chalmers HD21

Verdict: Allis Chalmers 4W-305 vs Allis Chalmers HD21

The Allis Chalmers 4W-305 and the Allis Chalmers HD21 are both tractors — here is how they stack up on the figures that matter. Allis Chalmers 4W-305 leads on rated power with 250 hp against 225 hp. Allis Chalmers 4W-305 is the lighter machine (12,292 kg vs 20,638 kg), which helps on soft ground and transport, while the heavier model carries more ballast for traction-limited draft work. Allis Chalmers 4W-305 holds more fuel (757.0 L vs 511.0 L) for longer stints between fills. Allis Chalmers 4W-305 is the newer design (1982 vs 1954). In short: choose the Allis Chalmers 4W-305 for outright pulling power, or the Allis Chalmers HD21 if a tighter budget and lighter footprint matter more. Compare the full spec tables below before booking a demo.

Tune the fit score

Tell us about your operation

Acreage600 acBudgetMain crop / use

Fit & specs

Allis Chalmers

Fit score

Clear

Allis Chalmers

Fit score

Best match

Clear

Rated power

250 hp

225 hp

Confidence

40%

Guide price

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Overview

Manufacturer

Allis ChalmersReference

With 20.8x38 tires.Reference

Drawbar performanceReference

Original price

$93,685Reference

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Final drives

planetaryReference

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Drive

—

crawlerReference

Engine

Fuel tank

757.0 LReference

511.0 LReference

Engine

227.4 kWReference

167.8 kWReference

Displacement

12.0 LReference

13.8 LReference

Bore/Stroke

133 x 143 mmReference

133 x 165 mmReference

Power

227.4 kWReference

167.8 kWReference

Air cleaner

dryReference

oil bathReference

Compression

16.25:1Reference

13.3:1Reference

Rated RPM

2300Reference

1800Reference

Idle RPM

950-2580Reference

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Starter volts

12Reference

24Reference

Oil capacity

56.8 LReference

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Coolant capacity

68.1 LReference

75.7 LReference

Drawbar (tested)

—

100.8 kWReference

Max power

—

100.8 kWReference

Transmission

Power DirectorReference

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Gears

20 forward and 4 reverseReference

2 forward and 1 reverseReference

PTO & Hydraulics

PTO (claimed)

186.4 kWReference

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Type

two-speed power shiftReference

torque converterReference

Valves

3Reference

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SCV flow

79.5 lpmReference

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Total flow

348.2 lpmReference

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Rear Type

IV/IIIReference

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Rear PTO

independentReference

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Rear PTO Type

1000 (1.75)Reference

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Dimensions

Wheelbase

320 cmReference

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Weight

12292 kgReference

20638 kgReference

Front tire

18.4x38Reference

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Rear tire

18.4x38Reference

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Ag front

20.8x38Reference

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Ag rear

20.8x38Reference

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Length

723 cmReference

502 cmReference

Height (hood)

246 cmReference

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Height (cab)

353 cmReference

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Shipping weight

12292 kgReference

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Clearance (front axle)

65 cmReference

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Clearance (rear axle)

75 cmReference

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Front axle

3035 mmReference

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Rear axle

3035 mmReference

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Height

—

251 cmReference

4W-305 Serial Numbers

1982

1001Reference

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1983

1112Reference

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1984

1176Reference

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Location:

Front frame, on rear left sideReference

Steering clutch housing or instrument panelReference

Electrical

Ground

negativeReference

—

Charging system

alternatorReference

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Battery volts

12Reference

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Speeds

HD21 Serial Numbers

Test results

Max pull

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18399 kgReference

Fit score weighs budget, operation size, crop match and data confidence against the details above. It’s guidance, not advice — always confirm with a dealer demo.