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Gravely 12-G vs Gravely 8121
Verdict: Gravely 12-G vs Gravely 8121
The Gravely 12-G and the Gravely 8121 are both lawn tractors — here is how they stack up on the figures that matter. Both are rated at the same 12 hp. Gravely 12-G is the lighter machine (385 kg vs 403 kg), which helps on soft ground and transport, while the heavier model carries more ballast for traction-limited draft work. Gravely 12-G is the newer design (1987 vs 1978). 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
Gravely
62
Fit score
Best match
Clear
Gravely
62
Fit score
Best match
Clear
Rated power
12 hp
12 hp
Confidence
40%
40%
Guide price
—
—
Overview
Manufacturer
GravelyReference
GravelyReference
air-cooledReference
Four gears (1-4) in two ranges (low/high) with directional control lever (forward/reverse). Reverse speeds are the same in high or low range.Reference
Engine
Fuel tank
20.1 LReference
—
Power
8.9 kWReference
—
Oil capacity
5.7 LReference
1.9 LReference
Displacement
—
29.07 ciReference
Bore/Stroke
—
83 x 86 mmReference
Power (gross)
—
8.9 kWReference
Starter
—
electricReference
Starter volts
—
12Reference
Transmission
Type
shaft-driven gearReference
shaft-driven gearReference
Gears
8 forward and 4 reverseReference
8 forward and 4 reverseReference
Oil type
SC10W-30Reference
—
Dimensions
Wheelbase
132 cmReference
121 cmReference
Weight
385 kgReference
403 kgReference
Front tire
16x6.50-8Reference
16x7.50-8Reference
Rear tire
23x8.50-12Reference
23x10.50-12Reference
Lawn/turf front
16x6.50-8Reference
16x7.50-8Reference
Lawn/turf rear
23x8.50-12Reference
23x10.50-12Reference
Length
208 cmReference
191 cmReference
Width
105 cmReference
92 cmReference
Height
129 cmReference
109 cmReference
Shipping weight
—
403 kgReference
Ground clearance
—
17 cmReference
Gravely 12-G attachments
Electrical
Ground
negativeReference
negativeReference
Battery volts
12Reference
12Reference
Charging system
—
flywheel alternatorReference
Charging amps
—
15Reference
Battery AH
—
42Reference
Attachment overview
Variants
8120
—
mechanical liftReference
8121
—
hydraulic liftReference
Capacities
Fuel
—
20.1 LReference
PTO & Hydraulics
Hydraulic system
—
1.4 LReference
Capacity
—
1.4 LReference
Pressure
—
82.7 barReference
Pump flow
—
6.4 lpmReference
Mid PTO
—
independentReference
Clutch
—
mechanicalReference
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.