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

FeatureDavid Brown 990 ImplematicTractorKubota M4030SUTractor
Tractor TypeUtility TractorUtility Tractor
Horsepower38.8 kW38.0 kW
Weight1940.0 kg—
Transmission TypePartially synchronized—
Length299.0 cm341.0 cm
Years Made1961-19651988-1998
Engine ModelDavid BrownKubota F2402-DI-A
Engine Type4-stroke, liquid-cooled, inline4-stroke, liquid-cooled, inline
Fuel TypeDieselDiesel
Cylinders45
Displacement3044 cc2436 cc
Bore9.19 cm—
Stroke11.40 cm—
Rear PTO TypeTransmission or liveIndependent
Rear PTO Speed540 /1000 RPM540 RPM
Rated RPM2200 RPM—
Compression Ratio17.0:1—
BatteryTwo 6V12 V
StarterElectricElectric
Height142.0 cm—
Wheelbase194.0 cm199.0 cm
Ground Clearance50.0 cm—
Fuel Tank Capacity52.0 l64.0 l
Oil Capacity7.4 l—
Coolant Capacity13.6 l—
Gears12 forward and 4 reverse8 forward and 2 reverse
Chassis4×2 2WD4×2 2WD
Max. Travel Speed10.4 km/h10.8 km/h
BrakesDifferential mechanical expanding shoeMechanical wet disc
Differential LockMechanical rear—
Drawbar CategoryII/II
Cabin TypeOpen operator stationOpen operator station with two-post ROPS
Steering TypeManual or hydrostatic powerPower
Front TiresAg: 6.00-16Ag: 6.00-16
Rear TiresAg: 11-32Ag: 14.9-28
Hydraulic TypeOpen centerOpen center
Total Flow28.0 LPM—
Working Pressure137.9 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