Compare/Allis Chalmers 840B vs Allis Chalmers HD-9G

Allis Chalmers 840B vs Allis Chalmers HD-9G

Verdict: Allis Chalmers 840B vs Allis Chalmers HD-9G

The Allis Chalmers 840B and the Allis Chalmers HD-9G are both industrial tractors — here is how they stack up on the figures that matter. Allis Chalmers 840B leads on rated power with 85 hp against 70 hp. Allis Chalmers 840B is the lighter machine (7,555 kg vs 13,335 kg), which helps on soft ground and transport, while the heavier model carries more ballast for traction-limited draft work. Allis Chalmers HD-9G holds more fuel (208.2 L vs 113.6 L) for longer stints between fills. Allis Chalmers 840B is the newer design (1975 vs 1951). In short: choose the Allis Chalmers 840B for outright pulling power, or the Allis Chalmers HD-9G 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

85 hp

70 hp

Confidence

40%

Guide price

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Overview

Manufacturer

Allis ChalmersReference

liquid-cooled inlineReference

liquid-cooled 2-cycle vertical I-headReference

Final drives

planetaryReference

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Drive

—

crawlerReference

Engine

Fuel tank

113.6 LReference

208.2 LReference

Engine (gross)

63.4 kWReference

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Engine (net)

59.7 kWReference

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Displacement

4.9 LReference

4.7 LReference

Bore/Stroke

98 x 108 mmReference

108 x 127 mmReference

Power (net)

59.7 kWReference

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Power (gross)

63.4 kWReference

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Rated RPM

2500Reference

1600Reference

Idle RPM

700-2700Reference

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Torque

461.0 NmReference

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Torque RPM

1400Reference

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Starter

electricReference

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Starter volts

12Reference

Oil capacity

18.9 LReference

25.6 LReference

Coolant capacity

22.7 LReference

27.4 LReference

Drawbar (claimed)

—

52.2 kWReference

Belt (claimed)

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62.6 kWReference

Compression

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16.0:1Reference

Transmission

Gears

3 forward and reverseReference

6 forward and 3 reverseReference

PTO & Hydraulics

Type

power shiftReference

gearReference

Pressure

155.1 barReference

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Pump flow

113.6 lpmReference

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Steering flow

46.2 lpmReference

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Steering press.

103.4 barReference

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Dimensions

Wheelbase

243 cmReference

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Weight

7555 kgReference

13335 kgReference

Front tire

15.5-25Reference

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Rear tire

15.5-25Reference

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Industrial front

15.5-25Reference

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Industrial rear

15.5-25Reference

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Length

533 cmReference

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Height (steering wheel)

240 cmReference

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Height (ROPS)

314 cmReference

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Operating weight

7555 kgReference

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Front tread

170 cmReference

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Rear tread

170 cmReference

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Shipping weight

—

13335 kgReference

Gauge

—

187 cmReference

Allis Chalmers 840B attachments

Electrical

Ground

negativeReference

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Charging system

alternatorReference

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Charging amps

55Reference

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Batteries

2Reference

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Battery volts

12Reference

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Battery AH

95Reference

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Allis Chalmers HD-9G attachments

HD-9G Serial Numbers

Location:

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Steering clutch housing or instrument panelReference

Allis Chalmers HD-9G Tracks

Width

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50 cmReference

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.