Compare/Allis Chalmers 20-35 vs Allis Chalmers B

Allis Chalmers 20-35 vs Allis Chalmers B

Verdict: Allis Chalmers 20-35 vs Allis Chalmers B

The Allis Chalmers 20-35 and the Allis Chalmers B are both tractors — here is how they stack up on the figures that matter. Both are rated at the same 20 hp. Allis Chalmers B is the lighter machine (934 kg vs 3,011 kg), which helps on soft ground and transport, while the heavier model carries more ballast for traction-limited draft work. Allis Chalmers 20-35 holds more fuel (94.6 L vs 45.4 L) for longer stints between fills. Allis Chalmers B is the newer design (1938 vs 1922). Use the full side-by-side spec tables below to weigh the details against your own operation, and confirm with a dealer demo.

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Acreage600 acBudgetMain crop / use

Fit & specs

Allis Chalmers

Fit score

Best match

Clear

Allis Chalmers

Fit score

Best match

Clear

Rated power

20 hp

Confidence

40%

Guide price

—

Overview

Manufacturer

Allis ChalmersReference

Gasoline 2-speed 2WDJune 19 - 26, 1928Link: Nebraska Tractor Test 151 fileReference

Gear 1 used for pull test.Reference

Factories

—

Southampton, EnglandReference

Total built

—

120,783Reference

Steering

—

manualReference

Engine

Fuel tank

94.6 LReference

45.4 LReference

Aux. fuel

29.3 LReference

—

Drawbar (claimed)

14.9 kWReference

—

Belt (claimed)

26.1 kWReference

—

Plows

4Reference

1 (16-inch)Reference

Drawbar (tested)

24.8 kWReference

14.5 kWReference

Belt (tested)

33.0 kWReference

16.6 kWReference

Displacement

7.6 LReference

1.9 LReference

Bore/Stroke

121 x 165 mmReference

76 x 102 mmReference

Fuel system

Kingston L 1.5" carburetorReference

—

Air cleaner

oil bathReference

Rated RPM

930Reference

1400Reference

Coolant capacity

37.9 LReference

7.6 LReference

Belt power (max)

33.0 kWReference

16.6 kWReference

Max power

24.8 kWReference

14.5 kWReference

Compression

—

4.92:1Reference

Firing order

—

1-2-4-3Reference

Starter volts

—

6Reference

Oil capacity

—

5.7 LReference

Sparkplug

—

AC 45Reference

Sparkplug gap

—

1.016 mmReference

Point gap

—

0.508 mmReference

Intake valve clearance

—

0.254 mmReference

Exhaust valve clearance

—

0.254 mmReference

Transmission

Type

unsynchronized gearReference

Gears

2 forward and 1 reverseReference

3 forward and 1 reverseReference

Clutch

hand-operated expanding shoeReference

dry discReference

Oil type

—

[0oC]Reference

32oF [0oC]↑

—

: SAE140Reference

32oF [0oC]↓

—

: SAE90Reference

Dimensions

Weight

3011 kgReference

934 kgReference

Front tire

36x6Reference

4.00-15Reference

Rear tire

50x12Reference

9-24Reference

Ag front

36x6 steelReference

4.00-15Reference

Ag rear

50x12 steelReference

8-38 (Asparagus Special)Reference

Length

342 cmReference

280 cmReference

Height

172 cmReference

—

Wheelbase

—

186 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

20-35 Serial Numbers

1923

6161Reference

—

1924

6397Reference

—

1925

6755Reference

—

1926

7369Reference

—

1927

8070Reference

—

1928

9870Reference

—

1929

16762Reference

—

1930

23252Reference

—

Location:

Serial number on a plate in front of the steering wheel until 1927. After, the serial number is front of shifter on transmission case.Reference

—

Final

24185Reference

127461Reference

Capacities

Diameter

33 cmReference

20 cmReference

Width

167 cmReference

157 cmReference

RPM

930Reference

1053Reference

Test results

Belt fuel use (max)

18.9 l/hourReference

7.9 l/hourReference

Max pull

1995 kgReference

1209 kgReference

Variants

—

industrial tractorReference

PTO & Hydraulics

Rear PTO

—

transmissionReference

Rear PTO Type

—

560Reference

B Serial Number Location

B Serial Numbers

1938

—

97Reference

1939

—

11800Reference

1940

—

33502Reference

1941

—

49721Reference

1942

—

56782Reference

1943

—

64501Reference

1944

—

65502Reference

1945

—

70210Reference

1946

—

1001 (IB)Reference

1947

—

1003 (IB)Reference

1948

—

1010 (IB)Reference

1949

—

1282 (IB)Reference

1950

—

1556 (IB)Reference

1951

—

4001 (EB)Reference

1952

—

6861 (EB)Reference

1953

—

9200 (EB)Reference

1954

—

11120 (EB)Reference

1955

—

124711Reference

1956

—

126497Reference

1957

—

127186Reference

Electrical

Ground

—

positiveReference

Charging system

—

generatorReference

Charging amps

—

12Reference

Battery volts

—

6Reference

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.