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

Allis Chalmers 840 vs Allis Chalmers HD-9G

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

The Allis Chalmers 840 and the Allis Chalmers HD-9G are both industrial tractors — here is how they stack up on the figures that matter. Allis Chalmers 840 leads on rated power with 83 hp against 70 hp. Allis Chalmers 840 is the lighter machine (6,645 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 840 is the newer design (1970 vs 1951). In short: choose the Allis Chalmers 840 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.

Tune the fit score

Tell us about your operation

Acreage600 acBudgetMain crop / use

Fit & specs

Allis Chalmers

Fit score

Best match

Clear

Allis Chalmers

Fit score

Best match

Clear

Rated power

83 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

Engine (gross)

61.9 kWReference

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Displacement

4.1 LReference

4.7 LReference

Bore/Stroke

101 x 127 mmReference

108 x 127 mmReference

Power (gross)

61.9 kWReference

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Compression

16:1Reference

16.0:1Reference

Rated RPM

2500Reference

1600Reference

Idle RPM

700-2700Reference

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Torque

271.2 NmReference

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Torque RPM

1400Reference

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Starter

electricReference

—

Starter volts

12Reference

Oil capacity

18.9 LReference

25.6 LReference

Coolant capacity

18.9 LReference

27.4 LReference

Fuel tank

—

208.2 LReference

Drawbar (claimed)

—

52.2 kWReference

Belt (claimed)

—

62.6 kWReference

Transmission

Gears

3 forward and reverseReference

6 forward and 3 reverseReference

Capacities

Fuel

128.7 LReference

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PTO & Hydraulics

Hydraulic system

113.6 LReference

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Type

power shiftReference

gearReference

Capacity

113.6 LReference

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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

6645 kgReference

13335 kgReference

Length

530 cmReference

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Height (steering wheel)

240 cmReference

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Height (exhaust)

251 cmReference

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Operating weight

6645 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 840 attachments

Electrical

Ground

negativeReference

—

Charging system

alternatorReference

—

Charging amps

55Reference

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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:

—

Steering clutch housing or instrument panelReference

Allis Chalmers HD-9G Tracks

Width

—

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.