Compare/Allis Chalmers 840B vs Allis Chalmers HD-6G

Allis Chalmers 840B vs Allis Chalmers HD-6G

Verdict: Allis Chalmers 840B vs Allis Chalmers HD-6G

The Allis Chalmers 840B and the Allis Chalmers HD-6G 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 80 hp. Allis Chalmers 840B is the lighter machine (7,555 kg vs 9,525 kg), which helps on soft ground and transport, while the heavier model carries more ballast for traction-limited draft work. Allis Chalmers 840B is the newer design (1975 vs 1956). In short: choose the Allis Chalmers 840B for outright pulling power, or the Allis Chalmers HD-6G 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

80 hp

Confidence

40%

Guide price

—

Overview

Manufacturer

Allis ChalmersReference

liquid-cooled inlineReference

liquid-cooledReference

Final drives

planetaryReference

—

Drive

—

crawlerReference

Engine

Fuel tank

113.6 LReference

—

Engine (gross)

63.4 kWReference

59.7 kWReference

Engine (net)

59.7 kWReference

53.7 kWReference

Displacement

4.9 LReference

5.6 LReference

Bore/Stroke

98 x 108 mmReference

113 x 141 mmReference

Power (net)

59.7 kWReference

53.7 kWReference

Power (gross)

63.4 kWReference

59.7 kWReference

Rated RPM

2500Reference

1800Reference

Idle RPM

700-2700Reference

—

Torque

461.0 NmReference

—

Torque RPM

1400Reference

—

Starter

electricReference

Starter volts

12Reference

24Reference

Oil capacity

18.9 LReference

Coolant capacity

22.7 LReference

31.2 LReference

Transmission

Gears

3 forward and reverseReference

4 forward and 2 reverseReference

Clutch

—

wet discReference

PTO & Hydraulics

Type

power shiftReference

gearReference

Pressure

155.1 barReference

—

Pump flow

113.6 lpmReference

151.4 lpmReference

Steering flow

46.2 lpmReference

—

Steering press.

103.4 barReference

—

Hydraulic system

—

102.2 LReference

Capacity

—

102.2 LReference

Dimensions

Wheelbase

243 cmReference

—

Weight

7555 kgReference

9525 kgReference

Front tire

15.5-25Reference

—

Rear tire

15.5-25Reference

—

Industrial front

15.5-25Reference

—

Industrial rear

15.5-25Reference

—

Length

533 cmReference

446 cmReference

Height (steering wheel)

240 cmReference

187 cmReference

Height (ROPS)

314 cmReference

—

Operating weight

7555 kgReference

—

Front tread

170 cmReference

—

Rear tread

170 cmReference

—

Height (exhaust)

—

200 cmReference

Shipping weight

—

9525 kgReference

Ripper

—

703 kgReference

Gauge

—

152 cmReference

Allis Chalmers 840B attachments

Electrical

Ground

negativeReference

—

Charging system

alternatorReference

—

Charging amps

55Reference

—

Batteries

2Reference

—

Battery volts

12Reference

—

Battery AH

95Reference

—

Variants

HD6A

—

44-inch gaugeReference

HD6B

—

60-inch gaugeReference

HD6E

—

5-rollerReference

HD6G

—

loaderReference

HD6EP

—

power shiftReference

HD6AG

—

turbochargedReference

Capacities

Fuel

—

151.4 LReference

Allis Chalmers HD-6G attachments

Allis Chalmers HD-6G Tracks

Width

—

198 cmReference

Length on ground

—

212 cmReference

Area on ground

—

1.4 m²Reference

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.