Compare/Allis Chalmers 7080 vs Allis Chalmers HD21

Allis Chalmers 7080 vs Allis Chalmers HD21

Verdict: Allis Chalmers 7080 vs Allis Chalmers HD21

The Allis Chalmers 7080 and the Allis Chalmers HD21 are both tractors — here is how they stack up on the figures that matter. Allis Chalmers HD21 leads on rated power with 225 hp against 182 hp. Allis Chalmers 7080 is the lighter machine (6,186 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 HD21 holds more fuel (511.0 L vs 242.2 L) for longer stints between fills. Allis Chalmers 7080 is the newer design (1975 vs 1954). In short: choose the Allis Chalmers HD21 for outright pulling power, or the Allis Chalmers 7080 if a tighter budget and lighter footprint matter more. Compare the full spec tables below before booking a demo.

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Acreage600 acBudgetMain crop / use

Fit & specs

Allis Chalmers

Fit score

Best match

Clear

Allis Chalmers

Fit score

Best match

Clear

Rated power

182 hp

225 hp

Confidence

40%

Guide price

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Overview

Manufacturer

Allis ChalmersReference

With 20.8x38 rear tires.Reference

Drawbar performanceReference

Original price

$54,561Reference

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Final drives

inboard planetaryReference

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Drive

—

crawlerReference

Engine

Fuel tank

242.2 LReference

511.0 LReference

Engine

156.6 kWReference

167.8 kWReference

Drawbar (claimed)

114.8 kWReference

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Drawbar (tested)

111.0 kWReference

100.8 kWReference

Displacement

7.0 LReference

13.8 LReference

Bore/Stroke

108 x 127 mmReference

133 x 165 mmReference

Power

156.6 kWReference

167.8 kWReference

Air cleaner

dry with pre-cleanerReference

oil bathReference

Compression

16:1Reference

13.3:1Reference

Rated RPM

2550Reference

1800Reference

Starter volts

12Reference

24Reference

Oil capacity

28.0 LReference

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Coolant capacity

34.1 LReference

75.7 LReference

Power at rated engine speed

135.4 kWReference

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Max power

111.0 kWReference

100.8 kWReference

Transmission

Allis-Chalmers Power DirectorReference

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Gears

20 forward and 4 reverseReference

2 forward and 1 reverseReference

PTO & Hydraulics

PTO (claimed)

135.3 kWReference

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PTO (tested)

135.4 kWReference

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Type

partial power shiftReference

torque converterReference

Valves

2 or 3Reference

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Pump flow

87.1 lpmReference

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Total flow

177.9 lpmReference

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Steering flow

37.9 lpmReference

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Rear Type

3/2Reference

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Rear lift (at 24"/610mm)

3030 kgReference

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Rear PTO

independentReference

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Rear PTO Type

1000Reference

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Dimensions

Wheelbase

269 cmReference

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Weight

6186 kgReference

20638 kgReference

Front tire

14Lx16Reference

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Rear tire

20.8x38Reference

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Ag front

18.4x16Reference

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Ag rear

18.4x42Reference

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Length

414 cmReference

502 cmReference

Width

303 cmReference

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Ground clearance

73 cmReference

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Rear axle

101 mmReference

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Steering wheel

223 cmReference

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Height

—

251 cmReference

Allis Chalmers 7080 attachments

7080 Serial Numbers

1975

1007Reference

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1976

1572Reference

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1977

2501Reference

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1978

3001Reference

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1979

3268Reference

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1980

3648Reference

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1981

3954Reference

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Location:

Above PTO shieldReference

Steering clutch housing or instrument panelReference

Allis Chalmers 7080 Height

Hood

175 cmReference

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Exhaust

297 cmReference

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Test results

Fuel use

42.8 l/hourReference

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Max pull

8381 kgReference

18399 kgReference

Speeds

HD21 Serial Numbers

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.