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

FeatureSimplicity 4040 PowrMaxTractorWheel Horse 257-HTractor
Tractor Main CategoryGarden and Lawn Care TractorsGarden and Lawn Care Tractors
Tractor TypeGarden TractorLawn Tractor
Horsepower12.3 kW12.7 kW
Weight590.0 kg—
Transmission TypeHydrostaticBelt-driven hydrostatic
Length210.0 cm182.0 cm
Years Made1987-19891988-1989
Engine ModelOnan CCKAKawasaki FC540V
Engine Type4-stroke, air-cooled4-stroke, air-cooled, inline
Fuel TypeGasolineGasoline
Cylinders21
Displacement816 cc534 cc
Bore8.31 cm8.89 cm
Stroke7.59 cm8.61 cm
Rear PTO TypeIndependent with electric clutch—
Rear PTO Speed2.000 RPM—
Front PTO TypeIndependent with electric clutch—
Front PTO Speed3.600 RPM—
Rated RPM3600 RPM—
Compression Ratio7.0:1—
Spark PlugChampion H-8NGK BPR5ES
Battery12 V, 52Ah12 V
StarterElectricElectric
Height121.0 cm—
Width143.0 cm90.0 cm
Wheelbase142.0 cm115.0 cm
Ground Clearance38.0 cm—
Fuel Tank Capacity14.4 l7.6 l
Oil Capacity3.3 l1.6 l
Transmission Oil Capacity5.7 l0.7 l
Engine Oil TypeSAE 5W-30, 30—
Transmission ModelSundstrand 15Eaton 7
GearsInfinite forward and reverseInfinite forward and reverse
Chassis4×2 2WD4×2 2WD
Max. Travel Speed10.0 km/h5.5 km/h
BrakesDisc—
Drawbar Category0—
Cabin TypeOpen operator stationOpen operator station
Steering TypeManualManual
Front TiresAg: 4.00×12Lawn/turf: 20×8-10Lawn/turf: 15×6.00-6
Rear TiresAg: 8×16Lawn/turf: 29×12.50-15Lawn/turf: 22×9.00-12
Total Flow8.5 LPM—
Middle PTO Type—Independent with electric clutch
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