Audi A8 (D3) 2003-2011 4.2 TDI 321bhp Stage 1 Eco remap figures
The Stage 1 Eco map for the Audi A8 4.2 TDI 321bhp (2003-2011): 364bhp and 739Nm expected from a standard 321bhp and 649Nm, up to +43bhp and +90Nm. It keeps most of the Stage 1 gain (Stage 1 is 378bhp and 747Nm) and is tuned with economy in mind: the choice if you want the performance and care what each tank costs.
Choose your map
Stage 1 Eco remap figures
Stage 1 Eco is performance with economy in mind. It keeps most of the Stage 1 gain, so the car still pulls well, but the map is shaped for efficient, relaxed driving rather than flat-out output. It is above the standard figures. We don't quote mpg, because economy depends on the car and how it is driven.
| Stock | Vanguard expected | Expected gain, up to | |
|---|---|---|---|
| Power | 321 bhp | 364 bhp | +43 bhp |
| Torque | 649 Nm | 739 Nm | +90 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 Eco map for?
- Drivers who want the pull of a remap for overtaking, motorways and towing, with the engine tuned with economy in mind.
- High-mileage drivers who want better performance and a more efficient everyday car in one map.
- Anyone who would otherwise take full Stage 1 but cares what each tank costs.
How Stage 1 Eco compares with Stage 1
Full Stage 1 on this Audi A8 is expected to give 378bhp and 747Nm (+57bhp, +98Nm). The Stage 1 Eco keeps about 75% of that power gain and 92% of the torque gain, so you get 364bhp and 739Nm: 14bhp less and 8Nm less than Stage 1, with the map shaped for efficient, relaxed driving, so it suits you if you want the pull and care about running costs. Both sit above the standard 321bhp and 649Nm.
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 Eco questions
How much power does the Stage 1 Eco map give the Audi A8 4.2 TDI 321bhp?
We expect 364bhp and 739Nm against 321bhp and 649Nm as standard: up to +43bhp and +90Nm. These are expected figures, and we confirm what is achievable on your own car after a diagnostic check.
How does Stage 1 Eco differ from Stage 1 on this engine?
Full Stage 1 is expected to give 378bhp and 747Nm. Stage 1 Eco gives 14bhp less and 8Nm less, in exchange for a map shaped with economy in mind. It still sits above the standard figures.
Is Stage 1 Eco or the Eco map better for me?
Choose Stage 1 Eco if you want the performance (364bhp and 739Nm) and still care about running costs. Choose the Eco map (359bhp and 734Nm) if economy matters more than pace.
Will the Stage 1 Eco map save fuel?
It is tuned with economy in mind while keeping most of the Stage 1 performance. We do not quote mpg figures, because economy depends on the car, its condition and how it is driven.
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