Compare/Allis Chalmers 6040 vs Allis Chalmers K

Allis Chalmers 6040 vs Allis Chalmers K

Verdict: Allis Chalmers 6040 vs Allis Chalmers K

The Allis Chalmers 6040 and the Allis Chalmers K are both tractors — here is how they stack up on the figures that matter. Allis Chalmers 6040 leads on rated power with 40 hp against 36 hp. Allis Chalmers 6040 is the lighter machine (4,250 kg vs 5,216 kg), which helps on soft ground and transport, while the heavier model carries more ballast for traction-limited draft work. Allis Chalmers 6040 is the newer design (1974 vs 1929). In short: choose the Allis Chalmers 6040 for outright pulling power, or the Allis Chalmers K 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

40 hp

36 hp

Confidence

40%

Guide price

—

Overview

Distributor

Allis ChalmersReference

—

Manufacturer

RenaultReference

Allis ChalmersReference

With 13.6-28 rear tires.Reference

The four-speed transmission was introduced in 1935 at tractor serial number 4451.Reference

Total built

499Reference

9,468Reference

Original price

$6,934Reference

—

Differential lock

mechanical rearReference

—

Drive

—

crawlerReference

Engine

Drawbar (claimed)

27.4 kWReference

26.5 kWReference

Drawbar (tested)

27.4 kWReference

40.0 kWReference

Displacement

2.5 LReference

8.4 LReference

Bore/Stroke

91 x 127 mmReference

127 x 165 mmReference

Air cleaner

paper elementReference

oil bathReference

Compression

18.5:1Reference

5.2:1Reference

Rated RPM

2250Reference

1050Reference

Idle RPM

725-2475Reference

—

Starter

electricReference

—

Starter volts

12Reference

—

Coolant capacity

7.6 LReference

41.6 LReference

Oil capacity

27.4 LReference

20.8 LReference

Oil change

75 hReference

—

Power at rated engine speed

30.1 kWReference

—

Max power

27.4 kWReference

40.0 kWReference

Fuel tank

—

147.6 LReference

Belt (claimed)

—

36.8 kWReference

Belt (tested)

—

46.4 kWReference

Belt power (max)

—

46.4 kWReference

Transmission

Gears

10 forward and 2 reverseReference

4 forward and 1 reverseReference

PTO & Hydraulics

PTO (claimed)

30.1 kWReference

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PTO (tested)

30.1 kWReference

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Hydraulic system

27.4 LReference

—

Type

partial synchronizedReference

gearReference

Capacity

27.4 LReference

—

Pressure

158.6 barReference

—

Pump flow

25.4 lpmReference

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Total flow

50.0 lpmReference

—

Steering flow

28.4 lpmReference

—

Steering press.

75.8 barReference

—

Rear Type

IIReference

—

Control

lower-link draft sensingReference

—

Rear PTO

liveReference

—

Clutch

254mm dry discReference

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Rear PTO Type

540 (1.375)Reference

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Engine RPM

540@2160Reference

—

Power at rated PTO speed

29.7 kWReference

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Capacities

Fuel

45.4 LReference

—

Dimensions

Wheelbase

200 cmReference

—

Weight

4250 to 4680 poundsReference

5216 kgReference

Front tire

6.00-16Reference

—

Rear tire

14.9-28Reference

—

Ag front

6.00-16Reference

—

Ag rear

14.9-28Reference

—

Length

325 cmReference

314 cmReference

Width

165 cmReference

38 cmReference

Clearance (front axle)

40 cmReference

—

Clearance (rear axle)

53 cmReference

—

Front tread

121 to 190 cmReference

—

Rear tread

127 to 198 cmReference

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Shipping

1927 kgReference

—

Operating

2122 kgReference

—

Ballasted

2753 kgReference

—

Steering wheel

157 cmReference

—

K Width

—

167 cmReference

Height (hood)

—

162 cmReference

K Gauge

—

121 cmReference

WK Gauge

—

160 cmReference

6040 Serial Numbers

Location:

Serial number plate on the right-front of the fuel tank, under the hood.Reference

Serial number on the transmission case or instrument panelReference

Electrical

Ground

negativeReference

—

Charging system

alternatorReference

—

Battery volts

12Reference

—

Allis Chalmers 6040 Height

Hood

136 cmReference

—

Exhaust

213 cmReference

—

Test results

Fuel use

10.6 l/hourReference

—

Max pull

2072 kgReference

5345 kgReference

Belt fuel use (max)

—

23.5 l/hourReference

Speeds

Variants

—

gasolineReference

—

wide gasReference

—

dieselReference

WKO

—

wide dieselReference

K Serial Numbers

1929

—

1Reference

1930

—

49Reference

1931

—

1373Reference

1932

—

2334Reference

1933

—

2654Reference

1934

—

3046Reference

1935

—

3594Reference

1936

—

4793Reference

Allis Chalmers K Tracks

Length on ground

—

170 cmReference

Area on ground

—

1.3 m²Reference

Ground pressure

—

0.4 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.