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Allis Chalmers 18-30 vs Allis Chalmers C

Verdict: Allis Chalmers 18-30 vs Allis Chalmers C

The Allis Chalmers 18-30 and the Allis Chalmers C are both tractors — here is how they stack up on the figures that matter. Allis Chalmers C leads on rated power with 19 hp against 18 hp. Allis Chalmers C is the lighter machine (1,134 kg vs 2,789 kg), which helps on soft ground and transport, while the heavier model carries more ballast for traction-limited draft work. Allis Chalmers 18-30 holds more fuel (94.6 L vs 49.2 L) for longer stints between fills. Allis Chalmers C is the newer design (1940 vs 1918). In short: choose the Allis Chalmers C for outright pulling power, or the Allis Chalmers 18-30 if a tighter budget and lighter footprint matter more. Compare the full spec tables below before booking a demo.

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Fit & specs
Allis Chalmers 18-30 Tractor
Allis Chalmers
62
Fit score
Best match
Clear
Allis Chalmers C Tractor
Allis Chalmers
62
Fit score
Best match
Clear
Rated power
18 hp
19 hp
Confidence
40%
40%
Guide price
Overview
Manufacturer
Allis ChalmersReference
Allis ChalmersReference
Drawbar performanceReference
Gasoline 3-speed 2WDOctober 28 - November 7, 1940Link: Nebraska Tractor Test 364 fileReference
Total built
1160Reference
84,020Reference
Engine
Fuel tank
94.6 LReference
49.2 LReference
Aux. fuel
29.3 LReference
3.8 LReference
Drawbar (claimed)
13.4 kWReference
Belt (claimed)
22.4 kWReference
Plows
3Reference
2Reference
Drawbar (tested)
15.3 kWReference
13.7 kWReference
Belt (tested)
24.9 kWReference
Displacement
7.6 LReference
2.1 LReference
Bore/Stroke
121 x 165 mmReference
86 x 89 mmReference
Fuel system
Kingston L 1.5" carburetorReference
Air cleaner
oil bathReference
oil bathReference
Rated RPM
830Reference
1500Reference
Coolant capacity
37.9 LReference
7.6 LReference
Belt power (max)
24.9 kWReference
Max power
15.3 kWReference
13.7 kWReference
Compression
5.75:1Reference
Firing order
1-2-4-3Reference
Starter volts
6Reference
Sparkplug
AC 45Reference
Sparkplug gap
0.889 mmReference
Point gap
0.508 mmReference
Intake valve clearance
0.254 mmReference
Exhaust valve clearance
0.254 mmReference
Oil capacity
6.6 LReference
Power at rated engine speed
17.4 kWReference
Transmission
Type
unsynchronized gearReference
non-synchronized gearReference
Gears
2 forward and 1 reverseReference
3 forward and 1 reverseReference
Clutch
hand-operated expanding shoeReference
Oil type
SAE20WReference
Dimensions
Weight
2789 kgReference
1134 kgReference
Front tire
36x6Reference
4.00-15Reference
Rear tire
50x12Reference
9-24Reference
Ag front
36x6 steelReference
6-12Reference
Ag rear
50x12 steelReference
10-24Reference
Length
342 cmReference
289 cmReference
Height
172 cmReference
159 cmReference
Wheelbase
195 cmReference
Front tread
208 cmReference
Rear tread
132 to 203 cmReference
18-30 Serial Numbers
1919
5006Reference
1920
5161Reference
1921
6015Reference
1922
????Reference
Location:
front of shifter on transmission caseReference
Capacities
Diameter
33 cmReference
20 cmReference
Width
167 cmReference
173 cmReference
RPM
930Reference
1129Reference
Test results
Belt fuel use (max)
17.4 l/hourReference
Fuel use
13.2 l/hourReference
7.6 l/hourReference
Max pull
1587 kgReference
1066 kgReference
PTO & Hydraulics
PTO (tested)
17.4 kWReference
Rear PTO
transmissionReference
Rear PTO Type
560Reference
C Serial Number Location
C Serial Numbers
1940
1Reference
1941
112Reference
1942
12389Reference
1943
18782Reference
1944
23908Reference
1945
30695Reference
1946
36378Reference
1947
39168Reference
1948
51515Reference
1949
68281Reference
1950
80518Reference
Electrical
Ground
positiveReference
Charging system
generatorReference
Charging amps
12Reference
Battery volts
6Reference
Battery AH
95Reference

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.

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