Compare/Allis Chalmers HD15 vs Allis Chalmers HD6AG

Allis Chalmers HD15 vs Allis Chalmers HD6AG

Verdict: Allis Chalmers HD15 vs Allis Chalmers HD6AG

The Allis Chalmers HD15 and the Allis Chalmers HD6AG are both tractors — here is how they stack up on the figures that matter. Allis Chalmers HD6AG leads on rated power with 90 hp against 82 hp. Allis Chalmers HD6AG is the lighter machine (6,078 kg vs 27,850 kg), which helps on soft ground and transport, while the heavier model carries more ballast for traction-limited draft work. Allis Chalmers HD6AG is the newer design (1965 vs 1951). In short: choose the Allis Chalmers HD6AG for outright pulling power, or the Allis Chalmers HD15 if a tighter budget and lighter footprint matter more. Compare the full spec tables below before booking a demo.

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Tell us about your operation

Acreage600 acBudgetMain crop / use

Fit & specs

Allis Chalmers

Fit score

Clear

Allis Chalmers

Fit score

Best match

Clear

Rated power

82 hp

90 hp

Confidence

40%

Guide price

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Overview

Manufacturer

Allis ChalmersReference

Gear 1 used for pull test.Reference

liquid-cooled vertical I-headReference

Total built

3,909Reference

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Drive

crawlerReference

Steering

9.5 LReference

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Engine

Drawbar (claimed)

61.1 kWReference

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Belt (claimed)

78.3 kWReference

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Drawbar (tested)

77.9 kWReference

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Belt (tested)

87.8 kWReference

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Displacement

7.0 LReference

5.6 LReference

Bore/Stroke

108 x 127 mmReference

113 x 141 mmReference

Compression

16.0:1Reference

16.25:1Reference

Rated RPM

1600Reference

1800Reference

Starter volts

12Reference

24Reference

Oil capacity

32.2 LReference

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Coolant capacity

44.5 LReference

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Belt power (max)

87.8 kWReference

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Max power

77.9 kWReference

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Fuel tank

—

140.0 LReference

Engine

—

67.1 kWReference

Power

—

67.1 kWReference

Transmission

constant meshReference

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Gears

6 forward and 3 reverseReference

5 forward and 1 reverseReference

Type

—

sliding gearReference

Capacities

Fuel

346.3 LReference

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Diameter

45 cmReference

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Width

245 cmReference

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RPM

693Reference

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Speed

995.48 meters/minReference

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Dimensions

Weight

27850 to 30895 poundsReference

6078 kgReference

Length

459 cmReference

322 cmReference

Height

241 cmReference

167 cmReference

Shipping weight

12632 kgReference

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Operating weight

14013 kgReference

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Ground clearance

36 cmReference

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Gauge

187 cmReference

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HD15 Serial Numbers

1950

1Reference

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1951

2Reference

—

1952

811Reference

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1953

1858Reference

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1954

2856Reference

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1955

3685Reference

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Location:

Steering clutch housing or instrument panelReference

Final

3909Reference

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Allis Chalmers HD15 Tracks

Test results

Max pull

13335 kgReference

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Variants

HD6A

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44-inch gaugeReference

HD6B

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60-inch gaugeReference

HD6E

—

5-rollerReference

HD6G

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loaderReference

HD6EP

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power shiftReference

HD6AG

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turbochargedReference

HD6AG Serial Numbers

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.