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Allis Chalmers 640 vs Allis Chalmers M7
Verdict: Allis Chalmers 640 vs Allis Chalmers M7
The Allis Chalmers 640 and the Allis Chalmers M7 are both industrial tractors — here is how they stack up on the figures that matter. Both are rated at the same 63 hp. Allis Chalmers M7 is the lighter machine (2,620 kg vs 3,687 kg), which helps on soft ground and transport, while the heavier model carries more ballast for traction-limited draft work. Allis Chalmers 640 is the newer design (1980 vs 1944). 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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Fit & specs
Allis Chalmers
62
Fit score
Best match
Clear
Allis Chalmers
62
Fit score
Best match
Clear
Rated power
63 hp
63 hp
Confidence
40%
40%
Guide price
—
—
Overview
Manufacturer
Allis ChalmersReference
Allis ChalmersReference
liquid-cooled inlineReference
Three gears, plus reverse, with two-speed range shift.Reference
Total built
—
291Reference
Drive
—
half-trackReference
Engine
Engine (gross)
47.0 kWReference
—
Engine (net)
42.5 kWReference
—
Displacement
3.3 LReference
2.2 LReference
Bore/Stroke
91 x 127 mmReference
79 x 111 mmReference
Power (net)
42.5 kWReference
—
Power (gross)
47.0 kWReference
—
Compression
17.5:1Reference
6.48:1Reference
Rated RPM
2300Reference
4000Reference
Torque
222.4 NmReference
142.4 NmReference
Torque RPM
1250Reference
2000Reference
Starter
electricReference
electricReference
Starter volts
12Reference
6Reference
Oil capacity
4.7 LReference
4.7 LReference
Coolant capacity
18.9 LReference
11.4 LReference
Fuel tank
—
39.7 LReference
Engine
—
47.0 kWReference
Power
—
47.0 kWReference
Fuel system
—
carburetorReference
Pre-heating
—
gasoline-fired boilerReference
Transmission
Gears
infinite forward and reverse (2-range)Reference
6 forward and 2 reverseReference
Transmission
—
WarnerReference
Clutch
—
203.2mm mechanical dry discReference
Capacities
Fuel
86.1 LReference
—
Tow capacity
—
1360 kgReference
PTO & Hydraulics
Hydraulic system
83.3 LReference
—
Type
hydrostaticReference
gearReference
Capacity
83.3 LReference
—
Pressure
155.1 barReference
—
Pump flow
94.6 lpmReference
—
Steering flow
34.1 lpmReference
—
Steering press.
103.4 barReference
—
Dimensions
Wheelbase
165 cmReference
205 cmReference
Weight
3687 kgReference
2620 to 3120 poundsReference
Front tire
12.00-16.5Reference
4.00-15Reference
Rear tire
12.00-16.5Reference
70x12Reference
Industrial front
31x15.5-15Reference
4.00-15Reference
Industrial rear
31x15.5-15Reference
70x12 skisReference
Length
449 cmReference
332 cmReference
Height (ROPS)
243 cmReference
—
Operating weight
3687 kgReference
—
Ground clearance
31 cmReference
—
Front tread
142 cmReference
101 cmReference
Rear tread
142 cmReference
114 cmReference
Width
—
160 cmReference
Height
—
162 cmReference
Clearance (front axle)
—
34 cmReference
Clearance (drawbar)
—
40 cmReference
Shipping
—
1188 kgReference
Operating
—
1415 kgReference
Allis Chalmers 640 attachments
Electrical
Ground
negativeReference
negativeReference
Charging system
alternatorReference
generatorReference
Charging amps
42Reference
40Reference
Battery volts
12Reference
6Reference
Battery AH
95Reference
116Reference
M7 Serial Numbers
Location:
—
Serial number plate on the right side of the driver's compartment.Reference
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.