Audi S4 (B6) 2000-2004 4.2 V8 339bhp remap figures
The Audi S4 4.2 V8 339bhp (2000-2004) is a petrol 4.2L model making 339bhp and 410Nm as standard. After a Stage 1 ECU remap we expect 379bhp and 462Nm - up to 40bhp and 52Nm more than stock.
Choose your map
Stage 1 remap figures
A Stage 1 remap is a software-only change to the ECU on an otherwise standard car. It needs no extra parts, which makes it the usual starting point.
| Stock | Vanguard expected | Expected gain, up to | |
|---|---|---|---|
| Power | 339 bhp | 379 bhp | +40 bhp |
| Torque | 410 Nm | 462 Nm | +52 Nm |
All maps at a glance
| Map | Power | Torque | Expected gain, up to |
|---|---|---|---|
| Stock | 339 bhp | 410 Nm | |
| Stage 1Maximum software-only performance | 379 bhp | 462 Nm | +40 bhp +52 Nm |
| Stage 1 EcoPerformance with economy in mind | 369 bhp | 458 Nm | +30 bhp +48 Nm |
| Eco mapEconomy first | 366 bhp | 455 Nm | +27 bhp +45 Nm |
Who is the Stage 1 map for?
- Drivers who want a sharper throttle and a small, honest gain from software alone.
- Owners who would rather keep the car standard in every other way.
- Anyone who wants the fullest software-only map for this engine, accepting that the gain is modest without a turbocharger.
What this means for your S4
Naturally aspirated petrol engines have no boost to raise, so gains from software alone are more modest than on a turbocharged car and come from fuelling, ignition and throttle response.
This car is listed with a Bosch ME7.1.1 engine control unit. Older engine management is simpler to work with, but age matters: worn sensors, leaks and tired components can hold back what a remap delivers, which is why we run a diagnostic check first.
We remap at our Belgrave Gate workshop in Leicester, or at your home or work within 30 miles, and every job starts with a diagnostic check.
Please note: these are expected figures, not guarantees. Real results vary with the condition of the vehicle, the ECU software version, fuel quality and the hardware fitted. Some options - including Stage 2 and anything that needs extra hardware - are for off-road or competition use only. We check every vehicle first and confirm what is achievable before any work starts.
Figures reviewed 22 October 2026.
Stage 1 questions
How much power does the Stage 1 map give the Audi S4 4.2 V8 339bhp?
We expect 379bhp and 462Nm against 339bhp and 410Nm as standard: up to +40bhp and +52Nm. These are expected figures, and we confirm what is achievable on your own car after a diagnostic check.
Does a Stage 1 remap need any extra parts on the Audi S4 4.2 V8 339bhp?
No. Stage 1 is a software-only change to the ECU on an otherwise standard car.
Is there a gentler map than Stage 1 for this engine?
Yes, two. Stage 1 Eco is performance with economy in mind: 369bhp and 458Nm expected. The Eco map is economy first: 366bhp and 455Nm. Both still sit above the standard 339bhp and 410Nm.
Do I need to tell my insurer about a remap?
Yes. A remap is a modification, so you should declare it to your insurer.
More Audi S4 figures
Other petrol variants
All petrol S4 (B6) variants · S4 (B6) 2000-2004 overview · All Audi figures