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John Deere S100 vs John Deere X166
Verdict: John Deere S100 vs John Deere X166
The John Deere S100 and the John Deere X166 are both lawn tractors — here is how they stack up on the figures that matter. Both are rated at the same 18 hp. John Deere S100 is the lighter machine (188 kg vs 240 kg), which helps on soft ground and transport, while the heavier model carries more ballast for traction-limited draft work. John Deere S100 is the newer design (2021 vs 2018). Use the full side-by-side spec tables below to weigh the details against your own operation, and confirm with a dealer demo.
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Fit & specs
John Deere
71
Fit score
Best match
Clear
John Deere
71
Fit score
Best match
Clear
Rated power
18 hp
18 hp
Confidence
98%
98%
Guide price
—
—
Overview
Manufacturer
John DeereReference
John DeereReference
air-cooled vertical-shaftReference
air-cooled vertical-shaft V-TwinReference
Engine
Fuel tank
9.1 LReference
9.1 LReference
Displacement
30.5 ciReference
40 ciReference
Bore/Stroke
90 x 78 mmReference
75 x 73 mmReference
Power
13.0 kWReference
13.4 kWReference
Air cleaner
dryReference
—
Starter
electricReference
electricReference
Starter volts
12Reference
12Reference
Sparkplug gap
0.762 mmReference
—
Oil capacity
1.4 LReference
1.9 LReference
Oil change
sealed unit, owner service is not recommendedReference
—
Transmission
Transmission
Tuff Torq TL200Reference
Tuff Torq K46Reference
Gears
—
infinite forward and reverseReference
PTO & Hydraulics
Mid PTO
independentReference
independentReference
Clutch
manualReference
electricReference
Dimensions
Weight
188 kgReference
240 kgReference
Front tire
15x6.00-6Reference
16x6.5-8Reference
Rear tire
20x8.00-8Reference
22x9.5-12Reference
Lawn/turf front
15x6.00-6Reference
16x6.5-8Reference
Lawn/turf rear
20x8.00-8Reference
22x9.5-12Reference
Length
174 cmReference
199 cmReference
Height
107 cmReference
116 cmReference
Wheelbase
—
122 cmReference
John Deere S100 attachments
S100 Serial Numbers
Location:
Serial number decal above the left rear tire, below the fender deck.Reference
—
Electrical
Ground
negativeReference
negativeReference
Charging amps
8Reference
9Reference
Battery volts
12Reference
12Reference
Battery Group
U1Reference
U1Reference
Attachment overview
42" Mower deck
Type
belt-driven hydrostaticReference
belt-driven hydrostaticReference
Cutting width
106 cmReference
121 cmReference
Overall width
140 cmReference
145 cmReference
Cut height
2 to 10 cmReference
2 to 10 cmReference
Capacities
Tow capacity
188 kgReference
—
Variants
X166
—
side dischargeReference
X166R
—
integral rear collectorReference
John Deere X166 attachments
48" Mower deck
Fit score weighs budget, operation size, crop match and data confidence against the details above. It’s guidance, not advice — always confirm with a dealer demo.