SPECS / COMPARISON

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Manufacturer-sourced values side by side. No performance equivalence or ranking is applied across different machine classes.

Feature	Allis Chalmers WDTractor	Ford 640Tractor
Tractor Type	Farm Tractor	Utility Tractor
Horsepower	19.4 kW	—
Weight	1590.0 kg	1370.0 kg
Transmission Type	Non-synchronized gear	Unsynchronized gear with dry disc clutch
Length	322.0 cm	308.0 cm
Years Made	1948-1953	1964-1967
Engine Model	Allis Chalmers	Ford EAE Red Tiger
Engine Type	4-stroke, liquid-cooled, inline	4-stroke, liquid-cooled, inline
Fuel Type	Gasoline	Gasoline/LP-gas
Cylinders	4	4
Displacement	3293 cc	2196 cc
Bore	10.21 cm	8.71 cm
Stroke	10.21 cm	9.09 cm
Rear PTO Type	Transmission or live	Transmission
Rear PTO Speed	540 RPM	540 RPM
Compression Ratio	5.75:1	6.6:1
Battery	6 V	6 V
Starter	Manual or electric	Electric
Height	207.0 cm	149.0 cm
Wheelbase	223.0 cm	191.0 cm
Fuel Tank Capacity	56.8 l	41.6 l
Coolant Capacity	13.2 l	14.2 l
Hydraulic Capacity	4.7 l	8.5 l
Gears	4 forward and 1 reverse	4 forward and 1 reverse
Chassis	4×2 2WD	4×2 2WD
Max. Travel Speed	3.6 km/h	6.9 km/h
Brakes	Manual external compression band type	Differential mechanical expanding shoe
Drawbar Category	Single Hitch Point	I
Cabin Type	Open operator station	Open operator station
Steering Type	Manual worm and horizontal sector	Manual or power assist
Front Tires	Ag: 5.50-16	Ag: 5.50-16
Rear Tires	Ag: 11-28	Ag: 11-28
Hydraulic Type	Open center	—
Working Pressure	82.7 bar	—
Valves	1	—
Lift Capacity	—	567.0 kg
Ground Clearance	—	53.0 cm
Oil Capacity	—	4.7 l
Steering Flow	—	24.6 LPM
Source	heavyequipments.net archive (imported 2026-10)	heavyequipments.net archive (imported 2026-10)

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Side-by-side specification comparisons generated from the manufacturer-sourced model files. · 7,051