Caterpillar D6 vs Cletrac FD
Side-by-side specs comparison
Verdict by the numbers
- The Cletrac FD is more powerful than the Caterpillar D6: 88 HP versus 86 HP (+2 HP, +2%).
- The Caterpillar D6 is the more recent model: production started in 1941, versus 1936 for the Cletrac FD.
Full specs comparison
| Caterpillar D6 | Cletrac FD | |
|---|---|---|
| Power | 86 HP | 88 HP |
| Production years | 1941–1947 | 1936–1944 |
| Fuel | Diesel | Diesel |
| Cylinders | 6 | 6 |
| Displacement | 8.6 L | 11.6 L |
| Transmission | Gear | Gear |
| Gears (fwd/rev) | 5 / 4 | 3 / 1 |
Frequently asked questions
Which is more powerful, the Caterpillar D6 or the Cletrac FD?
The Cletrac FD is more powerful than the Caterpillar D6: 88 HP versus 86 HP (+2 HP, +2%).
Which is more recent, the Caterpillar D6 or the Cletrac FD?
The Caterpillar D6 is the more recent model: production started in 1941, versus 1936 for the Cletrac FD.

