Compare/Allis Chalmers 8070 vs Allis Chalmers HD20

Allis Chalmers 8070 vs Allis Chalmers HD20

Verdict: Allis Chalmers 8070 vs Allis Chalmers HD20

The Allis Chalmers 8070 and the Allis Chalmers HD20 are both tractors — here is how they stack up on the figures that matter. Allis Chalmers HD20 leads on rated power with 175 hp against 171 hp. Allis Chalmers 8070 is the lighter machine (16,850 kg vs 18,597 kg), which helps on soft ground and transport, while the heavier model carries more ballast for traction-limited draft work. Allis Chalmers 8070 is the newer design (1982 vs 1951). In short: choose the Allis Chalmers HD20 for outright pulling power, or the Allis Chalmers 8070 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

171 hp

175 hp

Confidence

40%

Guide price

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Overview

Manufacturer

Allis ChalmersReference

Six power shift gears (1-6) in two ranges (slow/fast). Clutch must be used to shift range. Pressing the clutch pedal half-way automatically downshifts from 5th/6th to 4th gear.Reference

Drawbar performanceReference

Total built

2,354Reference

3,100Reference

Original price

$60,337Reference

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Differential lock

electro-hydraulic rearReference

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Steering

hydrostatic powerReference

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Drive

—

crawlerReference

Engine

Drawbar (tested)

108.4 kWReference

87.0 kWReference

Displacement

7.0 LReference

10.8 LReference

Bore/Stroke

108 x 127 mmReference

127 x 142 mmReference

Air cleaner

dryReference

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Compression

15.5:1Reference

18.0:1Reference

Rated RPM

2400Reference

1700Reference

Starter volts

12Reference

24Reference

Oil capacity

28.0 LReference

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Coolant capacity

34.1 LReference

56.8 LReference

Power at rated engine speed

127.3 kWReference

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Max power

108.4 kWReference

87.0 kWReference

Fuel tank

—

454.2 LReference

Engine (net)

—

130.5 kWReference

Drawbar (claimed)

—

87.2 kWReference

Power (net)

—

130.5 kWReference

Transmission

Power ShiftReference

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Gears

12 forward and 2 reverseReference

2 forward and 1 reverseReference

PTO & Hydraulics

PTO (tested)

127.3 kWReference

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Type

Allis-ChalmersReference

torque converterReference

Valves

2 or 3Reference

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Pump flow

51.1 lpmReference

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Total flow

170.3 lpmReference

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Steering flow

36.0 lpmReference

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Rear Type

III/IIReference

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Rear lift (at 24"/610mm)

3719 kgReference

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Rear PTO

independentReference

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Rear PTO Type

1000Reference

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Power at rated PTO speed

127.8 kWReference

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Capacities

Fuel

94.6 LReference

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Rear diff.

64.7 LReference

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Dimensions

Wheelbase

269 cmReference

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Weight

16850 to 17300 poundsReference

18597 kgReference

Front tire

10.00-16Reference

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Rear tire

18.4-38Reference

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2WD Ag front

18.4-16Reference

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4WD Ag front

14.9-24Reference

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Ag rear

16.9-38Reference

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Length

474 cmReference

485 cmReference

Width

303 cmReference

277 cmReference

Clearance (front axle)

55 cmReference

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Clearance (rear axle)

73 cmReference

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Operating

7643 kgReference

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4WD Operating

7847 kgReference

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Ballasted

10147 kgReference

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Height

—

241 cmReference

8070 Serial Number Location

8070 Serial Numbers

1981

1001Reference

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1982

1004Reference

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1983

1430Reference

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1984

2090Reference

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1985

2903Reference

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Final

3354Reference

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Electrical

Charging system

alternatorReference

—

Charging amps

100Reference

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Battery volts

12Reference

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Allis Chalmers 8070 Height

Hood

177 cmReference

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Cab

294 cmReference

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Exhaust

289 cmReference

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Test results

Fuel use

39.4 l/hourReference

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Max pull

8517 kgReference

18743 kgReference

Speeds

HD20 Serial Numbers

1951

—

3001Reference

1952

—

3828Reference

1953

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4923Reference

1954

—

5737Reference

Location:

—

Steering clutch housing or instrument panelReference

Allis Chalmers HD20 Tracks

Length on ground

—

270 cmReference

Area on ground

—

3.3 m²Reference

Ground pressure

—

0.6 barReference

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.