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Gray Tractor 15-25 B vs Wallis OK 15-27
Verdict: Gray Tractor 15-25 B vs Wallis OK 15-27
The Gray Tractor 15-25 B and the Wallis OK 15-27 are both tractors — here is how they stack up on the figures that matter. Both are rated at the same 15 hp. Wallis OK 15-27 is the lighter machine (1,646 kg vs 2,494 kg), which helps on soft ground and transport, while the heavier model carries more ballast for traction-limited draft work. Wallis OK 15-27 is the newer design (1923 vs 1915). 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
Gray Tractor
62
Fit score
Best match
Clear
Wallis
62
Fit score
Best match
Clear
Rated power
15 hp
15 hp
Confidence
40%
40%
Guide price
—
—
Overview
Manufacturer
Gray TractorReference
Wallis (a part of J.I. Case Plow Works)Reference
liquid-cooled inlineReference
Drawbar performanceReference
Drive
3x1 drum driveReference
—
Steering
—
manualReference
Engine
Fuel tank
113.6 LReference
—
Drawbar (claimed)
11.2 kWReference
11.2 kWReference
Belt (claimed)
18.6 kWReference
20.1 kWReference
Displacement
6.1 LReference
5.3 LReference
Bore/Stroke
108 x 171 mmReference
108 x 146 mmReference
Rated RPM
800Reference
1000Reference
Drawbar (tested)
—
13.5 kWReference
Belt (tested)
—
21.3 kWReference
Starter type
—
hand-crankReference
Belt power (max)
—
21.3 kWReference
Max power
—
13.5 kWReference
Transmission
Type
gearReference
gearReference
Gears
2 forward and 1 reverseReference
2 forward and 1 reverseReference
Dimensions
Weight
2494 kgReference
1646 kgReference
Front tire
39x8Reference
30x8Reference
Rear tire
55x48Reference
48x12Reference
Ag front
39x8 steelReference
30x8 (steel)Reference
Ag rear
55x48 steelReference
48x12 (steel)Reference
Length
441 cmReference
335 cmReference
Height
152 cmReference
165 cmReference
Capacities
Diameter
27 cmReference
46 cmReference
Width
193 cmReference
154 cmReference
RPM
—
475Reference
Speed
—
701.04 meters/minReference
Test results
Belt fuel use (max)
—
13.2 l/hourReference
Max pull
—
1174 kgReference
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.