Allis Chalmers HD21 vs John Deere 4955
Side-by-side specs comparison
Verdict by the numbers
- The Allis Chalmers HD21 and the John Deere 4955 deliver the same power: 225 HP.
- The John Deere 4955 is the more recent model: production started in 1988, versus 1954 for the Allis Chalmers HD21.
Full specs comparison
| Allis Chalmers HD21 | John Deere 4955 | |
|---|---|---|
| Power | 225 HP | 225 HP |
| Production years | 1954–1965 | 1988–1992 |
| Fuel | Diesel | Diesel |
| Cylinders | 6 | 6 |
| Displacement | 13.8 L | 7.6 L |
| Weight | — | 8 332 kg |
| Drive | — | 2WD or 4WD |
| Transmission | — | Power shift |
| Gears (fwd/rev) | 2 / 1 | 15 / 4 |
| Rear lift capacity | — | 3 395 kg |
| Wheelbase | — | 300 cm |
| Cab | — | Yes |
Frequently asked questions
Which is more powerful, the Allis Chalmers HD21 or the John Deere 4955?
The Allis Chalmers HD21 and the John Deere 4955 deliver the same power: 225 HP.
Which is more recent, the Allis Chalmers HD21 or the John Deere 4955?
The John Deere 4955 is the more recent model: production started in 1988, versus 1954 for the Allis Chalmers HD21.

