Rock Island G 15-25 vs Wallis OK 15-27
Side-by-side specs comparison
Verdict by the numbers
- The Wallis OK 15-27 is more powerful than the Rock Island G 15-25: 30 HP versus 27 HP (+3 HP, +11%).
- The Rock Island G 15-25 is the more recent model: production started in 1927, versus 1923 for the Wallis OK 15-27.
- The Rock Island G 15-25 is heavier: 1905 kg versus 1646 kg for the Wallis OK 15-27.
Full specs comparison
| Rock Island G 15-25 | Wallis OK 15-27 | |
|---|---|---|
| Power | 27 HP | 30 HP |
| Production years | 1927–1928 | 1923–1927 |
| Fuel | Kerosene | Gasoline |
| Cylinders | 4 | 4 |
| Displacement | 5.3 L | 5.3 L |
| Weight | 1 905 kg | 1 646 kg |
| Drive | 2WD | 2WD |
| Transmission | Synchronized | Gear |
| Gears (fwd/rev) | — | 2 / 1 |
| Length | — | 335 cm |
Frequently asked questions
Which is more powerful, the Rock Island G 15-25 or the Wallis OK 15-27?
The Wallis OK 15-27 is more powerful than the Rock Island G 15-25: 30 HP versus 27 HP (+3 HP, +11%).
Which is more recent, the Rock Island G 15-25 or the Wallis OK 15-27?
The Rock Island G 15-25 is the more recent model: production started in 1927, versus 1923 for the Wallis OK 15-27.
Which is heavier, the Rock Island G 15-25 or the Wallis OK 15-27?
The Rock Island G 15-25 is heavier: 1905 kg versus 1646 kg for the Wallis OK 15-27.