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Allis Chalmers D 40 vs Allis Chalmers HD-21 Series B
Verdict: Allis Chalmers D 40 vs Allis Chalmers HD-21 Series B
The Allis Chalmers D 40 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 D 40 leads on rated power with 385 hp against 273 hp. Allis Chalmers HD-21 Series B is the newer design (1969 vs 1963). In short: choose the Allis Chalmers D 40 for outright pulling power, or the Allis Chalmers HD-21 Series B 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
62
Fit score
Best match
Clear
Allis Chalmers
62
Fit score
Best match
Clear
Rated power
385 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
64Reference
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Drive
4x4 4WDReference
crawlerReference
Final drives
planetaryReference
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Engine
Engine (gross)
287.1 kWReference
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Displacement
13.8 LReference
13.8 LReference
Bore/Stroke
133 x 165 mmReference
133 x 165 mmReference
Power (gross)
287.1 kWReference
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Fuel system
direct injectionReference
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Air cleaner
dryReference
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Rated RPM
2000Reference
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Idle RPM
600-2000Reference
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Firing order
1-5-3-6-2-4Reference
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Starter
electricReference
electricReference
Starter volts
24Reference
24Reference
Coolant capacity
58.7 LReference
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Oil capacity
41.6 LReference
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Oil change
200 hReference
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Engine
—
203.6 kWReference
Power
—
203.6 kWReference
Transmission
Gears
4 forward and reverseReference
2 forward and reverseReference
Capacities
Fuel
359.6 LReference
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PTO & Hydraulics
Hydraulic system
291.4 LReference
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Type
power shiftReference
power shiftReference
Capacity
291.4 LReference
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Pump flow
416.4 lpmReference
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Dimensions
Wheelbase
294 cmReference
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Weight
52000 to 58300 poundsReference
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Front tire
29.5-25Reference
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Rear tire
29.5-25Reference
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Industrial front
29.5-25Reference
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Industrial rear
29.5-25Reference
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Length
683 cmReference
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Width
327 cmReference
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Height (hood)
279 cmReference
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Shipping weight
23587 kgReference
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Operating weight
26444 kgReference
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Ground clearance
86 cmReference
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Clearance (drawbar)
81 cmReference
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Front tread
251 cmReference
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Rear tread
251 cmReference
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Allis Chalmers D 40 attachments
D 40 Serial Numbers
Location:
Serial number plate to the left of the operator's seat.Reference
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Electrical
Ground
positiveReference
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Charging system
generatorReference
alternatorReference
Batteries
2Reference
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Battery volts
12Reference
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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.