Caterpillar R3 vs McCormick-Deering WD-40
Side-by-side specs comparison
Verdict by the numbers
- The McCormick-Deering WD-40 is more powerful than the Caterpillar R3: 48 HP versus 46 HP (+2 HP, +4%).
- The McCormick-Deering WD-40 is the more recent model: production started in 1935, versus 1934 for the Caterpillar R3.
Full specs comparison
| Caterpillar R3 | McCormick-Deering WD-40 | |
|---|---|---|
| Power | 46 HP | 48 HP |
| Production years | 1934–1935 | 1935–1940 |
| Fuel | Gasoline | Diesel |
| Cylinders | 4 | 4 |
| Displacement | 5.7 L | 7.6 L |
| Weight | — | 3 424 kg |
| Drive | — | 2WD |
| Transmission | Gear | Gear |
| Gears (fwd/rev) | 3 / 1 | 3 / 1 |
| Length | — | 359 cm |
Frequently asked questions
Which is more powerful, the Caterpillar R3 or the McCormick-Deering WD-40?
The McCormick-Deering WD-40 is more powerful than the Caterpillar R3: 48 HP versus 46 HP (+2 HP, +4%).
Which is more recent, the Caterpillar R3 or the McCormick-Deering WD-40?
The McCormick-Deering WD-40 is the more recent model: production started in 1935, versus 1934 for the Caterpillar R3.

