Audi RS4 B7 - 2004 - 2008 4.2 FSI V8 420hp
Real standard and upgraded performance figures for the 4.2 FSI V8 420hp engine in the Audi RS4 B7 - 2004 - 2008.
The Audi RS4 B7 - 2004 - 2008 4.2 FSI V8 420hp is one of the engines we work on regularly — here's what a stage remap typically changes for it.
| Horsepower (HP) | Torque (Nm) | |
|---|---|---|
| Standard | 420 | 430 |
| Stage 1 | 440 | 455 |
| Stage 2 | 455 | 470 |
- Make
- Audi
- Model
- RS4
- Generation
- B7 - 2004 - 2008
- Engine
- 4.2 FSI V8 420hp
- Fuel type
- Petrol
Frequently asked questions
Is Stage 1 tuning safe for the Audi RS4 B7 - 2004 - 2008 4.2 FSI V8 420hp?
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 4.2 FSI V8 420hp make after tuning?
Standard output is 420 HP / 430 Nm; Stage 1 on this engine typically reaches 440 HP / 455 Nm. Exact results can vary slightly with fuel quality and vehicle condition.
How long does a Audi RS4 B7 - 2004 - 2008 4.2 FSI V8 420hp 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 4.2 FSI V8 420hp 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.