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

FeatureDavid Brown 990 ImplematicTractorAllis Chalmers D15 Series IITractor
Tractor TypeUtility TractorRow-Crop Tractor
Horsepower38.8 kW—
Weight1940.0 kg2050.0 kg
Transmission TypePartially synchronizedShuttle
Length299.0 cm330.0 cm
Years Made1961-19651960-1968
Engine ModelDavid BrownAllis Chalmers D-175
Engine Type4-stroke, liquid-cooled, inline4-stroke, liquid-cooled, inline
Fuel TypeDieselDiesel
Cylinders44
Displacement3044 cc2867 cc
Bore9.19 cm8.99 cm
Stroke11.40 cm11.10 cm
Rear PTO TypeTransmission or liveLive
Rear PTO Speed540 /1000 RPM540 RPM
Rated RPM2200 RPM—
Compression Ratio17.0:115.5:1
BatteryTwo 6V12 V, 70Ah, one for gas/LP-gas, two for diesel
StarterElectricElectric
Height142.0 cm203.0 cm
Wheelbase194.0 cmmm
Ground Clearance50.0 cm—
Fuel Tank Capacity52.0 l59.6 l
Oil Capacity7.4 l4.7 l
Coolant Capacity13.6 l11.4 l
Gears12 forward and 4 reverse4 forward and 4 reverse
Chassis4×2 2WD4×2 2WD
Max. Travel Speed10.4 km/h7.5 km/h
BrakesDifferential mechanical expanding shoeExpanding shoe
Differential LockMechanical rear—
Drawbar CategoryII/III/I
Cabin TypeOpen operator stationOpen operator station
Steering TypeManual or hydrostatic powerManual or power
Front TiresAg: 6.00-16Ag: 5.50-16, 6.50-16
Rear TiresAg: 11-32Ag: 12.4-26, 13.6-26, 14.9-26
Hydraulic TypeOpen center—
Total Flow28.0 LPM—
Working Pressure137.9 bar158.6 bar
Spark Plug—AC C-45Champion J-7Auto-Lite A-5
Width—170.0 cm
Transmission Oil Capacity—14.0 l
Hydraulic Capacity—9.5 l
Valves—0 to 3
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