Audi A8 (D3) 2003-2011 4.2 TDI 321bhp remap figures
Stock, this 2003-2011 Audi A8 diesel (4.1L) produces 321bhp and 649Nm. Our expected figures for a Stage 1 remap are 378bhp and 747Nm, an expected gain of up to 57bhp and 98Nm.
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 | 321 bhp | 378 bhp | +57 bhp |
| Torque | 649 Nm | 747 Nm | +98 Nm |
All maps at a glance
| Map | Power | Torque | Expected gain, up to |
|---|---|---|---|
| Stock | 321 bhp | 649 Nm | |
| Stage 1Maximum software-only performance | 378 bhp | 747 Nm | +57 bhp +98 Nm |
| Stage 1 EcoPerformance with economy in mind | 364 bhp | 739 Nm | +43 bhp +90 Nm |
| Eco mapEconomy first | 359 bhp | 734 Nm | +38 bhp +85 Nm |
Who is the Stage 1 map for?
- Drivers who want stronger pulling power for overtaking, hills and towing, with no parts to fit.
- Daily and motorway drivers who want the engine to feel less strained at cruising speed.
- Anyone who wants the biggest software-only change we list for this engine.
What this means for your A8
On a diesel the biggest change is normally torque: the remap changes how much fuel and boost the ECU allows across the rev range, so pulling power arrives earlier and holds on longer.
The ECU recorded for this variant is a Bosch EDC16CP34. 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 A8 4.2 TDI 321bhp?
We expect 378bhp and 747Nm against 321bhp and 649Nm as standard: up to +57bhp and +98Nm. 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 A8 4.2 TDI 321bhp?
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: 364bhp and 739Nm expected. The Eco map is economy first: 359bhp and 734Nm. Both still sit above the standard 321bhp and 649Nm.
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 A8 figures
Other diesel variants
All diesel A8 (D3) variants · A8 (D3) 2003-2011 overview · All Audi figures