Compare/Allis Chalmers 6040 vs Allis Chalmers WD45

Allis Chalmers 6040 vs Allis Chalmers WD45

Verdict: Allis Chalmers 6040 vs Allis Chalmers WD45

The Allis Chalmers 6040 and the Allis Chalmers WD45 are both tractors — here is how they stack up on the figures that matter. Both are rated at the same 40 hp. Allis Chalmers WD45 is the lighter machine (3,995 kg vs 4,250 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 1953). Use the full side-by-side spec tables below to weigh the details against your own operation, and confirm with a dealer 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

Confidence

40%

Guide price

—

Overview

Distributor

Allis ChalmersReference

—

Manufacturer

RenaultReference

Allis ChalmersReference

With 13.6-28 rear tires.Reference

with 12x28 rear tires.Reference

Total built

499Reference

6,509 (diesel)Reference

Original price

$6,934Reference

—

Differential lock

mechanical rearReference

—

Steering

—

powerReference

Engine

Drawbar (claimed)

27.4 kWReference

—

Drawbar (tested)

27.4 kWReference

29.5 kWReference

Displacement

2.5 LReference

3.8 LReference

Bore/Stroke

91 x 127 mmReference

87 x 105 mmReference

Air cleaner

paper elementReference

oil bathReference

Compression

18.5:1Reference

15.5:1Reference

Rated RPM

2250Reference

1625Reference

Idle RPM

725-2475Reference

—

Starter

electricReference

—

Starter volts

12Reference

Coolant capacity

7.6 LReference

16.1 LReference

Oil capacity

27.4 LReference

16.1 LReference

Oil change

75 hReference

—

Power at rated engine speed

30.1 kWReference

—

Max power

27.4 kWReference

29.5 kWReference

Plows

—

4Reference

Belt (tested)

—

32.9 kWReference

Torque

—

351.2 NmReference

Torque RPM

—

1169Reference

Firing order

—

1-5-3-6-2-4Reference

Sparkplug gap

—

0.762 mmReference

Point gap

—

0.508 mmReference

Intake valve clearance

—

0.254 mmReference

Exhaust valve clearance

—

0.483 mmReference

Belt power (max)

—

32.3 kWReference

Transmission

Gears

10 forward and 2 reverseReference

4 forward and 1 reverseReference

PTO & Hydraulics

PTO (claimed)

30.1 kWReference

—

PTO (tested)

30.1 kWReference

—

Hydraulic system

27.4 LReference

5.7 LReference

Type

partial synchronizedReference

sliding gearReference

Capacity

27.4 LReference

5.7 LReference

Pressure

158.6 barReference

—

Pump flow

25.4 lpmReference

—

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

178mm wet discReference

Rear PTO Type

540 (1.375)Reference

Engine RPM

540@2160Reference

548@1400Reference

Power at rated PTO speed

29.7 kWReference

—

Oil type

—

SAE 80EPReference

45oF [7oC]↑

—

: SAE20WReference

45oF [7oC]↓

—

: SAE10WReference

Capacities

Fuel

45.4 LReference

56.8 LReference

Diameter

—

22 cmReference

RPM

—

1458Reference

Dimensions

Wheelbase

200 cmReference

223 cmReference

Weight

4250 to 4680 poundsReference

3995 to 4285 poundsReference

Front tire

6.00-16Reference

5.50-16Reference

Rear tire

14.9-28Reference

12-28Reference

Ag front

6.00-16Reference

5.50-16Reference

Ag rear

14.9-28Reference

13-28Reference

Length

325 cmReference

Width

165 cmReference

16 cmReference

Clearance (front axle)

40 cmReference

—

Clearance (rear axle)

53 cmReference

—

Front tread

121 to 190 cmReference

—

Rear tread

127 to 198 cmReference

141 to 228 cmReference

Shipping

1927 kgReference

—

Operating

2122 kgReference

—

Ballasted

2753 kgReference

—

Steering wheel

157 cmReference

—

Height (steering wheel)

—

172 cmReference

Height (exhaust)

—

207 cmReference

Gas Weight

—

1812 kgReference

Diesel Weight

—

1943 kgReference

Ground clearance

—

73 cmReference

6040 Serial Numbers

Location:

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

left brake housingReference

Electrical

Ground

negativeReference

positiveReference

Charging system

alternatorReference

—

Battery volts

12Reference

6Reference

Gas Batteries

—

1Reference

Diesel Batteries

—

2Reference

Battery AH

—

115Reference

Allis Chalmers 6040 Height

Hood

136 cmReference

—

Exhaust

213 cmReference

—

Test results

Fuel use

10.6 l/hourReference

—

Max pull

2072 kgReference

2679 kgReference

Belt fuel use (max)

—

11.7 l/hourReference

Speeds

WD45 Serial Numbers

1953

—

146607Reference

1954

—

160386Reference

1955

—

190993Reference

1956

—

217992Reference

1957

—

230295Reference

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.