John Deere 6420 DE Pump All 4.5 DE - 120hp
Real standard and upgraded performance figures for the 4.5 DE - 120hp engine in the John Deere 6420 DE Pump All.
This page covers the 4.5 DE - 120hp as fitted to the John Deere 6420 DE Pump All — the figures below reflect that specific engine, not the model as a whole.
| Horsepower (HP) | Torque (Nm) | |
|---|---|---|
| Standard | 120 | 1 |
| Stage 1 | 114 | — |
| Stage 2 | 111 | -1 |
- Make
- John Deere
- Model
- 6420 DE Pump
- Generation
- All
- Engine
- 4.5 DE - 120hp
- Fuel type
- diesel
Frequently asked questions
Is Stage 1 tuning safe for the John Deere 6420 DE Pump All 4.5 DE - 120hp?
Yes — Stage 1 for this engine is a software-only remap calibrated to stay within its stock mechanical limits (turbo, clutch, fueling), so no hardware changes are required.
How much more power does the 4.5 DE - 120hp make after tuning?
Standard output is 120 HP / 1 Nm; Stage 1 on this engine typically reaches 114 HP / 0 Nm. Exact results can vary slightly with fuel quality and vehicle condition.
How long does a John Deere 6420 DE Pump All 4.5 DE - 120hp remap take?
Once your original file is uploaded through the member panel, most requests for this engine are completed within a few hours.
Can the 4.5 DE - 120hp be reverted to its original file?
Yes — we keep the original file on record for the request, so the ECU can be put back to stock at any time.