Compare/Interstate Tractor Plow Man 15-30 vs Rock Island G2 15-25

Interstate Tractor Plow Man 15-30 vs Rock Island G2 15-25

Verdict: Interstate Tractor Plow Man 15-30 vs Rock Island G2 15-25

The Interstate Tractor Plow Man 15-30 and the Rock Island G2 15-25 are both tractors — here is how they stack up on the figures that matter. Both are rated at the same 15 hp. Rock Island G2 15-25 is the lighter machine (1,905 kg vs 2,177 kg), which helps on soft ground and transport, while the heavier model carries more ballast for traction-limited draft work. Rock Island G2 15-25 holds more fuel (79.5 L vs 64.3 L) for longer stints between fills. Rock Island G2 15-25 is the newer design (1929 vs 1918). Use the full side-by-side spec tables below to weigh the details against your own operation, and confirm with a dealer demo.

Tune the fit score

Tell us about your operation

Acreage600 acBudgetMain crop / use

Fit & specs

Interstate Tractor

Fit score

Best match

Clear

Rock Island

Fit score

Best match

Clear

Rated power

15 hp

Confidence

40%

Guide price

—

Overview

Manufacturer

Interstate TractorReference

Rock IslandReference

liquid-cooledReference

Gasoline 2-speed 2WDMay 4 - 8, 1929Link: Nebraska Tractor Test 158 fileReference

Steering

manualReference

Engine

Fuel tank

64.3 LReference

79.5 LReference

Aux. fuel

11.4 LReference

13.2 LReference

Drawbar (claimed)

11.2 kWReference

Belt (claimed)

22.4 kWReference

18.6 kWReference

Plows

3 (14-inch)Reference

—

Displacement

6.3 LReference

5.3 LReference

Bore/Stroke

114 x 152 mmReference

108 x 146 mmReference

Fuel system

Bennett carburetorReference

—

Starter type

hand-crankReference

—

Drawbar (tested)

—

19.0 kWReference

Belt (tested)

—

26.6 kWReference

Rated RPM

—

1100Reference

Belt power (max)

—

26.6 kWReference

Max power

—

19.0 kWReference

Transmission

Type

sliding gearReference

unsynchronized gearReference

Gears

2 forwardReference

2 forward and 1 reverseReference

Dimensions

Weight

2177 kgReference

1905 kgReference

Rear tire

60x10Reference

—

Ag rear

60x10 steelReference

—

Length

396 cmReference

—

Height

175 cmReference

—

Capacities

Diameter

35 cmReference

—

Width

167 cmReference

—

RPM

590Reference

—

Speed

655.32 meters/minReference

—

Links

Test results

Belt fuel use (max)

—

14.8 l/hourReference

Max pull

—

1609 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.