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

FeatureAllis Chalmers D21TractorAllis Chalmers 180Tractor
Tractor TypeRow-Crop TractorRow-Crop Tractor
Horsepower90.2 kW—
Weight4310.0 kg4660.0 kg
Transmission TypeSliding gear with dry disc clutchPartial powershift
Length407.0 cm401.0 cm
Years Made1965-19691967-1973
Engine ModelAllis Chalmers 3500Allis Chalmers
Engine Type4-stroke, liquid-cooled, inline4-stroke, liquid-cooled, inline
Fuel TypeDieselGasoline
Cylinders66
Displacement6980 cc4343 cc
Bore10.79 cm9.50 cm
Stroke12.70 cm10.21 cm
Rear PTO TypeIndependent—
Rear PTO Speed1.000 RPM540 RPM
Rated RPM2200 RPM—
Compression Ratio16.0:18.2:1
BatteryTwo or four 12V, 95AhOne or two 12V 95A
StarterElectricElectric
Height270.0 cm211.0 cm
Width232.0 cm194.0 cm
Wheelbase244.0 cm251.0 cm
Fuel Tank Capacity196.8 l93.0 l
Oil Capacity14.2 l11.5 l
Coolant Capacity29.3 l16.0 l
Transmission Oil Capacity64.4 l22.7 l
Transmission ModelPower DirectorAllis-Chalmers Power Director
Gears8 forward and 2 reverse8 forward and 2 reverse
Chassis4×2 2WD4×2 2WD
Max. Travel Speed11.0 km/h6.3 km/h
BrakesBand actuated discDifferential disc
Drawbar CategoryIII/IIII
Cabin TypeOpen operator stationOpen operator station
Steering TypePowerHydraulic power
Front TiresAg: 7.50×20Ag: 6.50-16; 7.50-16; 9.00-10
Rear TiresAg: 18.4×34Ag: 14.9/13-28; 16.9/14-28; 18.4/15-28; 23.1/18-26
Pump Flow—37.9 LPM
Hydraulic Capacity—34.0 l
Hydraulic Type—Open center
Steering Flow—22.0 LPM
Valves—2
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