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Kubota GR2120 vs Kubota ZD21
Verdict: Kubota GR2120 vs Kubota ZD21
The Kubota GR2120 and the Kubota ZD21 are both lawn tractors — here is how they stack up on the figures that matter. Both are rated at the same 21 hp. Kubota GR2120 is the lighter machine (439 kg vs 631 kg), which helps on soft ground and transport, while the heavier model carries more ballast for traction-limited draft work. Kubota ZD21 holds more fuel (29.9 L vs 18.2 L) for longer stints between fills. Kubota GR2120 is the newer design (2010 vs 2001). 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
Hydrostatic transmission with single foot pedal and standard cruise control.Reference
liquid-cooledReference
Steering
hydrostatic power (Glide Steer)Reference
differential powerReference
Engine
Fuel tank
18.2 LReference
29.9 LReference
Displacement
47.5 ciReference
47.5 ciReference
Bore/Stroke
67 x 74 mmReference
67 x 74 mmReference
Power (gross)
15.7 kWReference
15.7 kWReference
Starter
electricReference
electricReference
Starter volts
12Reference
12Reference
Rated RPM
—
3200Reference
Transmission
Type
shaft-driven hydrostaticReference
hydrostaticReference
Gears
infinite forward and reverseReference
infinite forward and reverseReference
Dimensions
Wheelbase
128 cmReference
124 cmReference
Weight
439 kgReference
631 kgReference
Front tire
16x7.5-8Reference
15x6.0-6Reference
Rear tire
23x10.50-12Reference
24x12-12Reference
Lawn/turf front
16x7.5-8Reference
15x6.0-6Reference
Lawn/turf rear
23x10.50-12Reference
24x12-12Reference
Length
196 cmReference
203 cmReference
Height
129 cmReference
—
Front tread
82 cmReference
97 cmReference
Rear tread
80 cmReference
107 cmReference
Width
—
145 cmReference
Height (steering wheel)
—
115 cmReference
Height (ROPS)
—
191 cmReference
Kubota GR2120 attachments
GR2120 Serial Number Location
Electrical
Ground
negativeReference
negativeReference
Battery volts
12Reference
12Reference
Battery CCA
—
450Reference
Attachment overview
PTO & Hydraulics
Mid PTO
—
independentReference
Kubota ZD21 attachments
60" Mower deck
Cutting width
—
152 cmReference
Overall width
—
187 cmReference
Cut height
—
2 to 12 cmReference
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.