Compare/Allis Chalmers HD6AG vs Allis Chalmers S

Allis Chalmers HD6AG vs Allis Chalmers S

Verdict: Allis Chalmers HD6AG vs Allis Chalmers S

The Allis Chalmers HD6AG and the Allis Chalmers S 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 84 hp. Allis Chalmers HD6AG is the lighter machine (6,078 kg vs 9,117 kg), which helps on soft ground and transport, while the heavier model carries more ballast for traction-limited draft work. Allis Chalmers S holds more fuel (242.2 L vs 140.0 L) for longer stints between fills. Allis Chalmers HD6AG is the newer design (1965 vs 1937). In short: choose the Allis Chalmers HD6AG for outright pulling power, or the Allis Chalmers S 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

Clear

Rated power

90 hp

84 hp

Confidence

40%

Guide price

—

Overview

Manufacturer

Allis ChalmersReference

liquid-cooled vertical I-headReference

PTO performanceReference

Drive

crawlerReference

Total built

—

1,225Reference

Variants

HD6A

44-inch gaugeReference

—

HD6B

60-inch gaugeReference

—

HD6E

5-rollerReference

—

HD6G

loaderReference

—

HD6EP

power shiftReference

—

HD6AG

turbochargedReference

—

gasolineReference

—

spark-ignition dieselReference

—

wideReference

Engine

Fuel tank

140.0 LReference

242.2 LReference

Engine

67.1 kWReference

—

Displacement

5.6 LReference

11.1 LReference

Bore/Stroke

113 x 141 mmReference

146 x 165 mmReference

Power

67.1 kWReference

—

Compression

16.25:1Reference

5:1Reference

Rated RPM

1800Reference

1050Reference

Starter volts

24Reference

6Reference

Drawbar (claimed)

—

35.8 kWReference

Belt (claimed)

—

49.2 kWReference

Drawbar (tested)

—

51.4 kWReference

Belt (tested)

—

55.8 kWReference

Fuel system

—

mechancal injectionReference

Air cleaner

—

oil bathReference

Coolant capacity

—

47.3 LReference

Oil capacity

—

21.8 LReference

Belt power (max)

—

55.8 kWReference

Max power

—

51.4 kWReference

Transmission

Type

sliding gearReference

gearReference

Gears

5 forward and 1 reverseReference

Clutch

—

dry discReference

Dimensions

Weight

6078 kgReference

9117 kgReference

Length

322 cmReference

370 cmReference

Height

167 cmReference

187 cmReference

Gauge

—

157 cmReference

HD6AG Serial Numbers

Location:

Steering clutch housing or instrument panelReference

transmission case or instrument panelReference

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

Width

—

246 cmReference

Length on ground

—

195 cmReference

Area on ground

—

1.8 m²Reference

Ground pressure

—

0.5 barReference

Test results

Belt fuel use (max)

—

22.7 l/hourReference

Max pull

—

5156 kgReference

Fuel use

—

31.0 l/hourReference

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.