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Kubota Z121S vs Kubota Z231KH
Verdict: Kubota Z121S vs Kubota Z231KH
The Kubota Z121S and the Kubota Z231KH are both lawn tractors — here is how they stack up on the figures that matter. Both are rated at the same 21 hp. Kubota Z231KH is the newer design (2019 vs 2014). 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
Kubota
71
Fit score
Best match
Clear
Kubota
71
Fit score
Best match
Clear
Rated power
21 hp
21 hp
Confidence
98%
98%
Guide price
—
—
Overview
Manufacturer
KubotaReference
KubotaReference
air-cooled vertical-shaft V-TwinReference
air-cooled vertical-shaft V-TwinReference
Steering
differential powerReference
—
Engine
Fuel tank
16.3 LReference
16.3 LReference
Displacement
45.6 ciReference
45.6 ciReference
Power (gross)
15.7 kWReference
—
Rated RPM
3600Reference
—
Starter
electricReference
electricReference
Starter volts
12Reference
12Reference
Oil capacity
2.3 LReference
2.3 LReference
Bore/Stroke
—
83 x 67 mmReference
Power
—
15.7 kWReference
Transmission
Transmission
Hydro-Gear ZT3100Reference
Hydro-Gear ZT3100Reference
Gears
infinite forward and reverseReference
infinite forward and reverseReference
PTO & Hydraulics
Mid PTO
independentReference
independentReference
Clutch
electric dry discReference
electricReference
Dimensions
Wheelbase
115 cmReference
115 cmReference
Weight
339 kgReference
339 kgReference
Front tire
11x4-5Reference
11x4-5Reference
Rear tire
22x10-14Reference
22x10-14Reference
Lawn/turf front
11x4-5Reference
11x4-5Reference
Lawn/turf rear
22x10-14Reference
22x10-14Reference
Length
194 cmReference
194 cmReference
Width
120 cmReference
120 cmReference
Height (ROPS)
165 cmReference
165 cmReference
Front tread
79 cmReference
79 cmReference
Rear tread
95 cmReference
95 cmReference
Kubota Z121S attachments
Electrical
Ground
negativeReference
negativeReference
Charging amps
15Reference
15Reference
Battery CCA
300Reference
300Reference
Battery volts
12Reference
12Reference
48" Mower deck
Type
hydrostaticReference
belt-driven hydrostaticReference
Cutting width
121 cmReference
121 cmReference
Overall width
155 cmReference
155 cmReference
Cut height
3 to 11 cmReference
3 to 10 cmReference
Kubota Z231KH attachments
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.