Compare/Gravely GMT 900 vs Gravely Pro Master 20-H

Gravely GMT 900 vs Gravely Pro Master 20-H

Verdict: Gravely GMT 900 vs Gravely Pro Master 20-H

The Gravely GMT 900 and the Gravely Pro Master 20-H are both lawn tractors — here is how they stack up on the figures that matter. Gravely GMT 900 leads on rated power with 26 hp against 20 hp. Gravely Pro Master 20-H is the lighter machine (444 kg vs 666 kg), which helps on soft ground and transport, while the heavier model carries more ballast for traction-limited draft work. Gravely GMT 900 holds more fuel (26.5 L vs 20.1 L) for longer stints between fills. Gravely Pro Master 20-H is the newer design (1989 vs 1977). In short: choose the Gravely GMT 900 for outright pulling power, or the Gravely Pro Master 20-H if a tighter budget and lighter footprint matter more. Compare the full spec tables below before booking a demo.

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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

26 hp

20 hp

Confidence

40%

Guide price

—

Overview

Manufacturer

GravelyReference

Gravely (a part of Ariens)Reference

liquid-cooledReference

air-cooledReference

Engine

Fuel tank

26.5 LReference

20.1 LReference

Displacement

51.6 ciReference

47.7 ciReference

Bore/Stroke

58 x 80 mmReference

83 x 73 mmReference

Power

19.4 kWReference

14.9 kWReference

Compression

8:1Reference

—

Rated RPM

3200Reference

—

Firing order

1-3-4-2Reference

—

Starter

electricReference

Starter volts

12Reference

Oil capacity

3.1 LReference

5.7 LReference

Power (gross)

—

14.9 kWReference

Transmission

Gears

8 forward and 4 reverseReference

infinite forward and reverseReference

Transmission

—

Eaton 850Reference

PTO & Hydraulics

Rear Type

IReference

—

Rear PTO

independentReference

—

Rear PTO Type

540 (1.375)Reference

—

Mid PTO

independentReference

—

Mid PTO Type

1893Reference

—

Front PTO

—

independentReference

Clutch

—

electricReference

Dimensions

Wheelbase

160 cmReference

—

Weight

225 kgReference

444 kgReference

Front tire

20x8.00-10Reference

18x8.50-8Reference

Rear tire

29x12.00-15Reference

4.80/4.00-8Reference

Lawn/turf front

20x8.00-10Reference

18x8.50-8Reference

Lawn/turf rear

29x12.00-15Reference

4.80/4.00-8Reference

Length

229 cmReference

266 cmReference

Width

139 cmReference

—

Height

123 cmReference

121 cmReference

Shipping weight

666 kgReference

—

Gravely GMT 900 attachments

Electrical

Ground

negativeReference

Battery volts

12Reference

Charging amps

—

20 (Onan)Reference

72" Mower deck

Type

shaft-driven gearReference

hydrostaticReference

Cutting width

182 cmReference

—

Cut height

4 to 13 cmReference

—

Gravely Pro Master 20-H attachments

Attachment overview

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.