Compare/Allis Chalmers B vs Allis Chalmers UC

Allis Chalmers B vs Allis Chalmers UC

Verdict: Allis Chalmers B vs Allis Chalmers UC

The Allis Chalmers B and the Allis Chalmers UC are both tractors — here is how they stack up on the figures that matter. Allis Chalmers B leads on rated power with 20 hp against 19 hp. Allis Chalmers B is the lighter machine (934 kg vs 2,637 kg), which helps on soft ground and transport, while the heavier model carries more ballast for traction-limited draft work. Allis Chalmers UC holds more fuel (90.8 L vs 45.4 L) for longer stints between fills. Allis Chalmers B is the newer design (1938 vs 1933). In short: choose the Allis Chalmers B for outright pulling power, or the Allis Chalmers UC 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

20 hp

19 hp

Confidence

40%

Guide price

—

Overview

Manufacturer

Allis ChalmersReference

Gear 1 used for pull test.Reference

Allis 300 ci 4-speed 2WDJune 16 - August 8, 1935Link: Nebraska Tractor Test 238 fileReference

Factories

Southampton, EnglandReference

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Total built

120,783Reference

1,541 UC CaneReference

Steering

manualReference

—

Variants

industrial tractorReference

—

standardReference

—

row-cropReference

Engine

Fuel tank

45.4 LReference

90.8 LReference

Plows

1 (16-inch)Reference

3Reference

Drawbar (tested)

14.5 kWReference

15.8 kWReference

Belt (tested)

16.6 kWReference

25.4 kWReference

Displacement

1.9 LReference

5.2 LReference

Bore/Stroke

76 x 102 mmReference

114 x 127 mmReference

Air cleaner

oil bathReference

—

Compression

4.92:1Reference

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Rated RPM

1400Reference

1200Reference

Firing order

1-2-4-3Reference

—

Starter volts

6Reference

—

Oil capacity

5.7 LReference

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Sparkplug

AC 45Reference

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Sparkplug gap

1.016 mmReference

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Point gap

0.508 mmReference

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Intake valve clearance

0.254 mmReference

—

Exhaust valve clearance

0.254 mmReference

—

Coolant capacity

7.6 LReference

22.7 LReference

Belt power (max)

16.6 kWReference

—

Max power

14.5 kWReference

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Aux. fuel

—

3.8 LReference

Drawbar (claimed)

—

14.2 kWReference

Belt (claimed)

—

23.1 kWReference

Belt power (max):

—

25.4 kWReference

Max power:

—

17.7 kWReference

Transmission

Gears

3 forward and 1 reverseReference

4 forward and 1 reverseReference

Clutch

dry discReference

—

Oil type

[0oC]Reference

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32oF [0oC]↑

: SAE140Reference

—

32oF [0oC]↓

: SAE90Reference

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PTO & Hydraulics

Type

unsynchronized gearReference

non-synchronized gearReference

Rear PTO

transmissionReference

—

Rear PTO Type

560Reference

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Dimensions

Wheelbase

186 cmReference

220 cmReference

Weight

934 kgReference

2637 kgReference

Front tire

4.00-15Reference

24x5Reference

Rear tire

9-24Reference

42x2Reference

Ag front

4.00-15Reference

6.00x16Reference

Ag rear

8-38 (Asparagus Special)Reference

12.75x24Reference

Length

280 cmReference

368 cmReference

Height (exhaust)

194 cmReference

—

Shipping weight

934 kgReference

—

Ballasted weight

1901 kgReference

—

Ground clearance

71 cmReference

—

Front tread

96 to 152 cmReference

—

Rear tread

101 to 152 cmReference

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Height

—

176 cmReference

B Serial Number Location

B Serial Numbers

1938

97Reference

UC3757Reference

1939

11800Reference

UC4547Reference

1940

33502Reference

UC4770Reference

1941

49721Reference

UC4972Reference

1942

56782Reference

—

1943

64501Reference

—

1944

65502Reference

5038Reference

1945

70210Reference

-Reference

1946

1001 (IB)Reference

-Reference

1947

1003 (IB)Reference

5068Reference

1948

1010 (IB)Reference

5268Reference

1949

1282 (IB)Reference

5526Reference

1950

1556 (IB)Reference

5644Reference

1951

4001 (EB)Reference

5806Reference

1952

6861 (EB)Reference

5939Reference

1953

9200 (EB)Reference

6143Reference

1954

11120 (EB)Reference

—

1955

124711Reference

—

1956

126497Reference

—

1957

127186Reference

—

Final

127461Reference

—

Capacities

Diameter

20 cmReference

25 cmReference

Width

157 cmReference

205 cmReference

RPM

1053Reference

1095Reference

Speed

—

874.78 meters/minReference

Electrical

Ground

positiveReference

—

Charging system

generatorReference

—

Charging amps

12Reference

—

Battery volts

6Reference

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Test results

Belt fuel use (max)

7.9 l/hourReference

—

Max pull

1209 kgReference

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Belt fuel use (max):

—

15.5 l/hourReference

Max pull:

—

1176 kgReference

UC Serial Numbers

1930

—

UC1Reference

1931

—

UC39Reference

1932

—

UC1100Reference

1933

—

UC1232Reference

1934

—

UC1294Reference

1935

—

UC1552Reference

1936

—

UC2001Reference

1937

—

UC2771Reference

Location:

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Rear axle near PTOReference

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.