Compare/Allis Chalmers 640 vs Allis Chalmers HD-9G

Allis Chalmers 640 vs Allis Chalmers HD-9G

Verdict: Allis Chalmers 640 vs Allis Chalmers HD-9G

The Allis Chalmers 640 and the Allis Chalmers HD-9G are both industrial tractors — here is how they stack up on the figures that matter. Allis Chalmers HD-9G leads on rated power with 70 hp against 63 hp. Allis Chalmers 640 is the lighter machine (3,687 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 640 is the newer design (1980 vs 1951). In short: choose the Allis Chalmers HD-9G for outright pulling power, or the Allis Chalmers 640 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

63 hp

70 hp

Confidence

40%

Guide price

—

Overview

Manufacturer

Allis ChalmersReference

liquid-cooled inlineReference

liquid-cooled 2-cycle vertical I-headReference

Drive

—

crawlerReference

Engine

Engine (gross)

47.0 kWReference

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Engine (net)

42.5 kWReference

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Displacement

3.3 LReference

4.7 LReference

Bore/Stroke

91 x 127 mmReference

108 x 127 mmReference

Power (net)

42.5 kWReference

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Power (gross)

47.0 kWReference

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Compression

17.5:1Reference

16.0:1Reference

Rated RPM

2300Reference

1600Reference

Torque

222.4 NmReference

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Torque RPM

1250Reference

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Starter

electricReference

—

Starter volts

12Reference

Oil capacity

4.7 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

infinite forward and reverse (2-range)Reference

6 forward and 3 reverseReference

Capacities

Fuel

86.1 LReference

—

PTO & Hydraulics

Hydraulic system

83.3 LReference

—

Type

hydrostaticReference

gearReference

Capacity

83.3 LReference

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Pressure

155.1 barReference

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Pump flow

94.6 lpmReference

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Steering flow

34.1 lpmReference

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Steering press.

103.4 barReference

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Dimensions

Wheelbase

165 cmReference

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Weight

3687 kgReference

13335 kgReference

Front tire

12.00-16.5Reference

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Rear tire

12.00-16.5Reference

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Industrial front

31x15.5-15Reference

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Industrial rear

31x15.5-15Reference

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Length

449 cmReference

—

Height (ROPS)

243 cmReference

—

Operating weight

3687 kgReference

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Ground clearance

31 cmReference

—

Front tread

142 cmReference

—

Rear tread

142 cmReference

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Shipping weight

—

13335 kgReference

Gauge

—

187 cmReference

Allis Chalmers 640 attachments

Electrical

Ground

negativeReference

—

Charging system

alternatorReference

—

Charging amps

42Reference

—

Battery volts

12Reference

—

Battery AH

95Reference

—

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.