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

FeatureJohn Deere 8630TractorJohn Deere 8640Tractor
Tractor TypeFarm TractorFarm Tractor
Horsepower205.1 kW205.1 kW
Weight11110.0 kg12820.0 kg
Transmission TypePartial power shift with hydraulic wet disc clutchPartial power shift with hydraulic wet disc clutch
Length567.0 cm567.0 cm
Pump Flow124.9 LPM124.9 LPM
Years Made1975-19781979-1982
Engine ModelJohn DeereJohn Deere
Engine Type4-stroke, liquid-cooled, inline4-stroke, liquid-cooled, inline
Fuel TypeDieselDiesel
Cylinders66
Displacement10144 cc10140 cc
Bore13.00 cm13.00 cm
Stroke12.70 cm12.70 cm
Rear PTO TypeIndependentIndependent
Rear PTO Speed1.000 RPM1000 RPM
Rated RPM2100 RPM2100 RPM
Compression Ratio15.4:115.2:1
BatteryTwo 6V, CCA 975A12 V
StarterElectricElectric
Height341.0 cm321.0 cm
Wheelbase317.0 cm317.0 cm
Ground Clearance49.0 cm46.0 cm
Fuel Tank Capacity590.5 l810.0 l
Coolant Capacity41.6 l45.4 l
Hydraulic Capacity98.4 l155.2 l
Transmission ModelJohn Deere Quad-RangeJohn Deere Quad-Range
Gears16 forward and 4 reverse16 forward and 6 reverse
Chassis4×4 articulated 4WD4×4 MFWD 4WD
Max. Travel Speed17.9 km/h21.7 km/h
BrakesHydraulic wet discHydraulic wet disc
Drawbar CategoryIIIIII/IIIN
Cabin TypeSound-Gard cabCab
Steering TypeHydraulic powerArticulated power
Front TiresAg: 18.4-34Ag: 18.4-34
Rear TiresAg: 18.4-34Ag: 18.4-34
Hydraulic TypeClosed center constant pressureClosed center
Valves22
Lift Capacity—3875.0 kg
Oil Capacity—24.6 l
Transmission Oil Capacity—155.2 l
Differential Lock—Hydraulic front and rear
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