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Gravely 8171 vs Gravely 818
Verdict: Gravely 8171 vs Gravely 818
The Gravely 8171 and the Gravely 818 are both lawn tractors — here is how they stack up on the figures that matter. Gravely 818 leads on rated power with 18 hp against 17 hp. Gravely 818 is the lighter machine (408 kg vs 424 kg), which helps on soft ground and transport, while the heavier model carries more ballast for traction-limited draft work. In short: choose the Gravely 818 for outright pulling power, or the Gravely 8171 if a tighter budget and lighter footprint matter more. Compare the full spec tables below before booking a demo.
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Fit & specs
Gravely
62
Fit score
Best match
Clear
Gravely
62
Fit score
Best match
Clear
Rated power
17 hp
18 hp
Confidence
40%
40%
Guide price
—
—
Overview
Manufacturer
GravelyReference
GravelyReference
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
air-cooled horizontal-shaft opposed-twinReference
Engine
Displacement
49.8 ciReference
47.7 ciReference
Bore/Stroke
76 x 83 mmReference
83 x 73 mmReference
Power (gross)
12.3 kWReference
13.4 kWReference
Starter
electricReference
electricReference
Starter volts
12Reference
12Reference
Oil capacity
1.9 LReference
5.7 LReference
Fuel tank
—
20.1 LReference
Transmission
Gears
8 forward and 4 reverseReference
8 forward and 4 reverseReference
Capacities
Fuel
20.1 LReference
—
PTO & Hydraulics
Hydraulic system
1.4 LReference
—
Type
shaft-driven gearReference
3-blade with hydraulic liftReference
Capacity
1.4 LReference
—
Pressure
82.7 barReference
—
Pump flow
6.4 lpmReference
—
Mid PTO
independentReference
—
Clutch
mechanicalReference
—
Dimensions
Wheelbase
121 cmReference
—
Weight
424 kgReference
408 kgReference
Front tire
16x7.50-8Reference
16x6.50-8Reference
Rear tire
23x10.50-12Reference
23x8.50-12Reference
Lawn/turf front
16x7.50-8Reference
16x6.50-8Reference
Lawn/turf rear
23x10.50-12Reference
23x8.50-12Reference
Length
191 cmReference
207 cmReference
Width
106 cmReference
106 cmReference
Height
109 cmReference
109 cmReference
Shipping weight
424 kgReference
408 kgReference
Ground clearance
17 cmReference
—
Electrical
Ground
negativeReference
negativeReference
Charging system
flywheel alternatorReference
—
Charging amps
15Reference
—
Battery volts
12Reference
12Reference
Battery AH
42Reference
43Reference
Battery Group
—
22FReference
Gravely 818 attachments
Attachment overview
50" Mower deck
Cutting width
—
127 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.