Compare/Gravely 818 vs Gravely Pro Master 20-H

Gravely 818 vs Gravely Pro Master 20-H

Verdict: Gravely 818 vs Gravely Pro Master 20-H

The Gravely 818 and the Gravely Pro Master 20-H are both lawn tractors — here is how they stack up on the figures that matter. Gravely Pro Master 20-H leads on rated power with 20 hp against 18 hp. Gravely 818 is the lighter machine (408 kg vs 444 kg), which helps on soft ground and transport, while the heavier model carries more ballast for traction-limited draft work. Gravely Pro Master 20-H is the newer design (1989 vs 1978). In short: choose the Gravely Pro Master 20-H for outright pulling power, or the Gravely 818 if a tighter budget and lighter footprint matter more. Compare the full spec tables below before booking a demo.

Tune the fit score

Tell us about your operation

Acreage600 acBudgetMain crop / use

Fit & specs

Gravely

Fit score

Best match

Clear

Gravely

Fit score

Best match

Clear

Rated power

18 hp

20 hp

Confidence

40%

Guide price

—

Overview

Manufacturer

GravelyReference

Gravely (a part of Ariens)Reference

air-cooled horizontal-shaft opposed-twinReference

air-cooledReference

Engine

Fuel tank

20.1 LReference

Displacement

47.7 ciReference

Bore/Stroke

83 x 73 mmReference

Power (gross)

13.4 kWReference

14.9 kWReference

Starter

electricReference

Starter volts

12Reference

Oil capacity

5.7 LReference

Power

—

14.9 kWReference

Transmission

Gears

8 forward and 4 reverseReference

infinite forward and reverseReference

Transmission

—

Eaton 850Reference

Dimensions

Weight

408 kgReference

444 kgReference

Front tire

16x6.50-8Reference

18x8.50-8Reference

Rear tire

23x8.50-12Reference

4.80/4.00-8Reference

Lawn/turf front

16x6.50-8Reference

18x8.50-8Reference

Lawn/turf rear

23x8.50-12Reference

4.80/4.00-8Reference

Length

207 cmReference

266 cmReference

Width

106 cmReference

—

Height

109 cmReference

121 cmReference

Shipping weight

408 kgReference

—

Gravely 818 attachments

Electrical

Ground

negativeReference

Battery volts

12Reference

Battery AH

43Reference

—

Battery Group

22FReference

—

Charging amps

—

20 (Onan)Reference

Attachment overview

50" Mower deck

Type

3-blade with hydraulic liftReference

hydrostaticReference

Cutting width

127 cmReference

—

PTO & Hydraulics

Front PTO

—

independentReference

Clutch

—

electricReference

Gravely Pro Master 20-H 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.