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Allis Chalmers 745 vs Allis Chalmers HD-21 Series B
Verdict: Allis Chalmers 745 vs Allis Chalmers HD-21 Series B
The Allis Chalmers 745 and the Allis Chalmers HD-21 Series B are both industrial tractors — here is how they stack up on the figures that matter. Allis Chalmers HD-21 Series B leads on rated power with 273 hp against 202 hp. Allis Chalmers HD-21 Series B is the newer design (1969 vs 1967). In short: choose the Allis Chalmers HD-21 Series B for outright pulling power, or the Allis Chalmers 745 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
85
Fit score
Best match
Clear
Allis Chalmers
62
Fit score
Clear
Rated power
202 hp
273 hp
Confidence
40%
40%
Guide price
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Overview
Manufacturer
Allis ChalmersReference
Allis ChalmersReference
liquid-cooled inlineReference
liquid-cooledReference
Total built
948Reference
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Final drives
planetaryReference
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Drive
—
crawlerReference
Engine
Engine (net)
150.6 kWReference
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Displacement
8.5 LReference
13.8 LReference
Bore/Stroke
113 x 141 mmReference
133 x 165 mmReference
Power (net)
150.6 kWReference
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Rated RPM
2200Reference
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Torque
802.8 NmReference
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Torque RPM
1800Reference
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Starter type
electricReference
—
Engine
—
203.6 kWReference
Power
—
203.6 kWReference
Starter
—
electricReference
Starter volts
—
24Reference
Transmission
Gears
4 forward and reverseReference
2 forward and reverseReference
PTO & Hydraulics
Type
power shiftReference
power shiftReference
Pressure
124.1 barReference
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Pump flow
355.8 lpmReference
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Steering flow
136.3 lpmReference
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Dimensions
Wheelbase
330 cmReference
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Weight
15989 kgReference
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Shipping weight
15989 kgReference
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Allis Chalmers 745 attachments
Electrical
Charging system
—
alternatorReference
Charging amps
—
20Reference
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.