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

FeatureJohn Deere 2840TractorAGCO 6690Tractor
Tractor TypeUtility TractorUtility Tractor
Horsepower66.4 kW64.8 kW
Weight3945.0 kg—
Transmission TypeSliding gear—
Length406.0 cm408.0 cm
Pump Flow87.1 LPM42.5 LPM
Years Made1977-19791991-1997
Engine ModelJohn DeereSLH 1000.4-AT
Engine Type4-stroke, liquid-cooled, inline4-stroke, air-cooled, inline
Fuel TypeDieselDiesel
Cylinders64
Displacement5391 cc3998 cc
Bore10.21 cm10.49 cm
Stroke11.00 cm11.61 cm
Rear PTO TypeIndependent with hydraulic clutchIndependent with hydraulic wet disc clutch
Rear PTO Speed540 /1.000 RPM540 /1000 RPM
Rated RPM2500 RPM2500 RPM
Compression Ratio17.0:1—
BatteryTwo 12V12 V, 100Ah
StarterElectricElectric
Height187.0 cm282.0 cm
Wheelbase246.0 cm235.0 cm
Fuel Tank Capacity106.0 l107.0 l
Coolant Capacity4.7 l—
Hydraulic Capacity48.8 l57.5 l
Final DrivePlanetary—
Gears6 forward and 3 reverse16 forward and reverse
Chassis4×2 2WD4×2 2WD or 4×4 MFWD 4WD
Max. Travel Speed9.5 km/h28.5 km/h
BrakesDifferential hydraulic wet discHydraulic wet disc
Differential LockMechanical rear—
Drawbar CategoryIIII/I
Cabin TypeOpen operator station or two-post Roll-Gard ROPSFlat-deck with four-post ROPS or Cab
Hitch TypeDraft sensingPosition and draft control with lower-link sensing
Steering TypePower assistHydrostatic power
Front TiresAg: 7.50-18Ag: 7.50-18 , 14.9R24
Rear TiresAg: 18.4-34Ag: 16.9R34
Hydraulic TypeClosed centerOpen center
Valves22
Lift Capacity—3080.0 kg
Width—209.0 cm
Ground Clearance—44.0 cm
Oil Capacity—8.7 l
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