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Key differences: S140Lawn Tractor has more weight, a wider cutting deck and a smaller engine. S120Lawn Tractor has less weight, a narrower cutting deck and a larger engine. Objective comparison of stated specs — not a recommendation.
How to read the labels
  • larger / more / wider / faster — this mower has the higher value for that spec.
  • smaller / less / lighter / slower — this mower has the lower value.
  • Labels are directional only; whether more is desirable depends on your needs.
  • Note: a lower deck-gauge number means thicker steel, so for Deck Gauge a smaller number is the more durable deck.
Spec S140Lawn Tractor
John Deere · Riding (Lawn Tractor)
S120Lawn Tractor
John Deere · Riding (Lawn Tractor)
Engine
Power Source gas gas
Displacement 44.2 ci (724 cc) smaller 44.2 ci (724.3 cc) larger
Engine Power 22 hp 22 hp
Cylinders 2 2
Engine Model 44N677 (M44) 44N677 (M44)
Fuel Type Gasoline
Deck
Cutting Width 48 in (1219 mm) wider 42 in (1067 mm) narrower
Min Cut Height 1 in (25 mm) 1 in (25 mm)
Max Cut Height 4 in (102 mm) 4 in (102 mm)
Deck Material Steel, 12 gauge 0.105 in. 2.7 mm Steel, 13 gauge0.090 in.2.3 mm
Discharge Side discharge
Deck Gauge 12 13
Drive
Transmission TLT200 hydrostatic, two-wheel drive Hydrostatic, 2-wheel drive
Ground Speed 5.5 mph 5.5 mph
Drive System Single belt Manual power take-off (PTO)
Reverse Speed 3.2 mph 3.2 mph
Dimensions
Weight 468 lbs (212.3 kg) heavier 444 lbs (201.4 kg) lighter
Fuel Capacity 2.4 gal (9.1 L) 2.4 gal (9.1 L)
Length 69.7 in.1770 mm
Height 44 in.1118 mm
General
Warranty 2 yr 2 yr
Bagger Capacity 6.5 bu (229 L) 6.5 bu (229 L)

Independent reference database. Specs compiled from manufacturer sources and normalized for comparison; verify with the manufacturer or dealer before purchase.