Compare/Allis Chalmers K vs Allis Chalmers WD45

Allis Chalmers K vs Allis Chalmers WD45

Verdict: Allis Chalmers K vs Allis Chalmers WD45

The Allis Chalmers K and the Allis Chalmers WD45 are both tractors — here is how they stack up on the figures that matter. Allis Chalmers WD45 leads on rated power with 40 hp against 36 hp. Allis Chalmers WD45 is the lighter machine (3,995 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 WD45 is the newer design (1953 vs 1929). In short: choose the Allis Chalmers WD45 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.

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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

36 hp

40 hp

Confidence

40%

Guide price

—

Overview

Manufacturer

Allis ChalmersReference

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

with 12x28 rear tires.Reference

Total built

9,468Reference

6,509 (diesel)Reference

Drive

crawlerReference

—

Steering

—

powerReference

Variants

gasolineReference

—

wide gasReference

—

dieselReference

—

WKO

wide dieselReference

—

Engine

Fuel tank

147.6 LReference

—

Drawbar (claimed)

26.5 kWReference

—

Belt (claimed)

36.8 kWReference

—

Drawbar (tested)

40.0 kWReference

29.5 kWReference

Belt (tested)

46.4 kWReference

32.9 kWReference

Displacement

8.4 LReference

3.8 LReference

Bore/Stroke

127 x 165 mmReference

87 x 105 mmReference

Air cleaner

oil bathReference

Compression

5.2:1Reference

15.5:1Reference

Rated RPM

1050Reference

1625Reference

Coolant capacity

41.6 LReference

16.1 LReference

Belt power (max)

46.4 kWReference

32.3 kWReference

Max power

40.0 kWReference

29.5 kWReference

Plows

—

4Reference

Torque

—

351.2 NmReference

Torque RPM

—

1169Reference

Firing order

—

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

Starter volts

—

12Reference

Sparkplug gap

—

0.762 mmReference

Point gap

—

0.508 mmReference

Intake valve clearance

—

0.254 mmReference

Exhaust valve clearance

—

0.483 mmReference

Transmission

Type

gearReference

sliding gearReference

Gears

4 forward and 1 reverseReference

Oil capacity

20.8 LReference

16.1 LReference

Dimensions

Weight

5216 kgReference

3995 to 4285 poundsReference

Length

314 cmReference

325 cmReference

K Width

167 cmReference

—

Height (hood)

162 cmReference

—

K Gauge

121 cmReference

—

WK Gauge

160 cmReference

—

Wheelbase

—

223 cmReference

Front tire

—

5.50-16Reference

Rear tire

—

12-28Reference

Ag front

—

5.50-16Reference

Ag rear

—

13-28Reference

Height (steering wheel)

—

172 cmReference

Height (exhaust)

—

207 cmReference

Gas Weight

—

1812 kgReference

Diesel Weight

—

1943 kgReference

Ground clearance

—

73 cmReference

Rear tread

—

141 to 228 cmReference

K Serial Numbers

1929

1Reference

—

1930

49Reference

—

1931

1373Reference

—

1932

2334Reference

—

1933

2654Reference

—

1934

3046Reference

—

1935

3594Reference

—

1936

4793Reference

—

Location:

Serial number on the transmission case or instrument panelReference

left brake housingReference

Allis Chalmers K Tracks

Width

38 cmReference

16 cmReference

Length on ground

170 cmReference

—

Area on ground

1.3 m²Reference

—

Ground pressure

0.4 barReference

—

Test results

Belt fuel use (max)

23.5 l/hourReference

11.7 l/hourReference

Max pull

5345 kgReference

2679 kgReference

Capacities

Fuel

—

56.8 LReference

Diameter

—

22 cmReference

RPM

—

1458Reference

PTO & Hydraulics

Hydraulic system

—

5.7 LReference

Capacity

—

5.7 LReference

Oil type

—

SAE 80EPReference

45oF [7oC]↑

—

: SAE20WReference

45oF [7oC]↓

—

: SAE10WReference

Rear PTO

—

liveReference

Clutch

—

178mm wet discReference

Rear PTO Type

—

540 (1.375)Reference

Engine RPM

—

548@1400Reference

WD45 Serial Numbers

1953

—

146607Reference

1954

—

160386Reference

1955

—

190993Reference

1956

—

217992Reference

1957

—

230295Reference

Electrical

Ground

—

positiveReference

Gas Batteries

—

1Reference

Diesel Batteries

—

2Reference

Battery volts

—

6Reference

Battery AH

—

115Reference

Speeds

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.