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

FeatureAllis Chalmers D21 Series ITractorFord 8600Tractor
Tractor TypeRow-Crop TractorRow-Crop Tractor
Horsepower76.8 kW—
Weight4310.0 kg3643.0 kg
Transmission TypeSliding gear with dry disc clutchPartial power shift
Length407.0 cm376.0 cm
Years Made1963-19651972-1976
Engine ModelAllis Chalmers 3400Ford
Engine Type4-stroke, liquid-cooled, inline4-stroke, liquid-cooled, inline
Fuel TypeDieselDiesel
Cylinders66
Displacement6980 cc6571 cc
Bore10.79 cm11.20 cm
Stroke12.70 cm11.20 cm
Rear PTO TypeIndependentIndependent
Rear PTO Speed1.000 RPM540 /1000 RPM
Rated RPM2200 RPM—
Compression Ratio16.0:116.5:1
BatteryTwo or four 12V, 95Ah12 V, 128Ah
StarterElectricElectric
Height270.0 cm187.0 cm
Width232.0 cm—
Wheelbase244.0 cm232.0 cm
Fuel Tank Capacity196.8 l162.8 l
Oil Capacity11.4 l11.4 l
Coolant Capacity19.9 l18.5 l
Transmission Oil Capacity87.1 l65.3 l
Transmission ModelPower DirectorDual Power
Gears8 forward and 2 reverse16 forward and 4 reverse
Chassis4×2 2WD4×2 2WD
Max. Travel Speed11.0 km/h12.4 km/h
BrakesBand actuated discDifferential hydraulic wet disc
Drawbar CategoryIII/IIII
Cabin TypeOpen operator stationOpen operator station or Cab
Steering TypePowerHydrostatic power
Front TiresAg: 7.50×20Ag: 7.50-18 , 7.50-16
Rear TiresAg: 18.4×34Ag: 18.4-34 , 16.9-34
Pump Flow—45.4 LPM
Ground Clearance—Front axle: 23.6 in. (60.0 cm) All purpose:
Hydraulic Capacity—65.3 l
Differential Lock—Foot pedal
Total Flow—61.3 LPM
Steering Flow—15.9 LPM
Working Pressure—172.4 bar
Sourceheavyequipments.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