Compare/Allis Chalmers HD15 vs Allis Chalmers S

Allis Chalmers HD15 vs Allis Chalmers S

Verdict: Allis Chalmers HD15 vs Allis Chalmers S

The Allis Chalmers HD15 and the Allis Chalmers S are both tractors — here is how they stack up on the figures that matter. Allis Chalmers S leads on rated power with 84 hp against 82 hp. Allis Chalmers S is the lighter machine (9,117 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 HD15 is the newer design (1951 vs 1937). In short: choose the Allis Chalmers S 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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Acreage600 acBudgetMain crop / use

Fit & specs

Allis Chalmers

Fit score

Best match

Clear

Allis Chalmers

Fit score

Best match

Clear

Rated power

82 hp

84 hp

Confidence

40%

Guide price

—

Overview

Manufacturer

Allis ChalmersReference

Gear 1 used for pull test.Reference

PTO performanceReference

Total built

3,909Reference

1,225Reference

Drive

crawlerReference

Steering

9.5 LReference

—

Engine

Drawbar (claimed)

61.1 kWReference

35.8 kWReference

Belt (claimed)

78.3 kWReference

49.2 kWReference

Drawbar (tested)

77.9 kWReference

51.4 kWReference

Belt (tested)

87.8 kWReference

55.8 kWReference

Displacement

7.0 LReference

11.1 LReference

Bore/Stroke

108 x 127 mmReference

146 x 165 mmReference

Compression

16.0:1Reference

5:1Reference

Rated RPM

1600Reference

1050Reference

Starter volts

12Reference

6Reference

Oil capacity

32.2 LReference

21.8 LReference

Coolant capacity

44.5 LReference

47.3 LReference

Belt power (max)

87.8 kWReference

55.8 kWReference

Max power

77.9 kWReference

51.4 kWReference

Fuel tank

—

242.2 LReference

Fuel system

—

mechancal injectionReference

Air cleaner

—

oil bathReference

Transmission

constant meshReference

—

Gears

6 forward and 3 reverseReference

5 forward and 1 reverseReference

Type

—

gearReference

Clutch

—

dry discReference

Capacities

Fuel

346.3 LReference

—

Diameter

45 cmReference

—

Width

245 cmReference

246 cmReference

RPM

693Reference

—

Speed

995.48 meters/minReference

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Dimensions

Weight

27850 to 30895 poundsReference

9117 kgReference

Length

459 cmReference

370 cmReference

Height

241 cmReference

187 cmReference

Shipping weight

12632 kgReference

—

Operating weight

14013 kgReference

—

Ground clearance

36 cmReference

—

Gauge

187 cmReference

157 cmReference

HD15 Serial Numbers

1950

1Reference

—

1951

2Reference

—

1952

811Reference

—

1953

1858Reference

—

1954

2856Reference

—

1955

3685Reference

—

Location:

Steering clutch housing or instrument panelReference

transmission case or instrument panelReference

Final

3909Reference

—

Allis Chalmers HD15 Tracks

Test results

Max pull

13335 kgReference

5156 kgReference

Belt fuel use (max)

—

22.7 l/hourReference

Fuel use

—

31.0 l/hourReference

Variants

—

gasolineReference

—

spark-ignition dieselReference

—

wideReference

PTO & Hydraulics

PTO (tested)

—

62.9 kWReference

S Serial Numbers

1937

—

3Reference

1938

—

413Reference

1939

—

585Reference

1940

—

1085Reference

1941

—

1128Reference

1942

—

1212Reference

Last

—

1227Reference

Allis Chalmers S Tracks

Length on ground

—

195 cmReference

Area on ground

—

1.8 m²Reference

Ground pressure

—

0.5 barReference

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.