Considering an ECU remap for your Audi A8 4.0 TFSI 420hp? A Stage 1 remap can take this D4 - 2010 - 2016 petrol engine from 420 BHP to 540 BHP and from 600 Nm to 800 Nm of torque (turbocharged). This engine scores 8/10 for remap suitability. Get a free personalised quote from a trusted remap professional and find out exactly what your Audi A8 can achieve.
Comparisons are calculated from our own recorded Stage 1 figures.
The Audi A8 4.0 TFSI 420hp is a 4.0L turbocharged petrol engine producing 420 BHP and 600 Nm from the factory. With a typical Stage 1 remap, output increases to approximately 540 BHP and 800 Nm — a gain of around 120 BHP (29%) and 200 Nm (33%).
This engine scores highly for remap suitability, with a balanced spread of gains across both power and torque — providing a noticeable improvement across the rev range. The tuning headroom is classified as high, based on the percentage gain available from the factory output.
From a technical perspective, the ECU is typically a Bosch MED17 (likely), and the transmission is manual and dsg/s tronic automatics are common depending on model/engine. some dsg/dual-clutch gearboxes have torque management; calibration may be torque-limited. at this torque level, transmission and driveline servicing history becomes especially important..
Considerations: Turbo petrol: fuel quality and cooling can influence repeatable performance.. High tuned torque: check transmission torque capacity and service history.. Large torque increase: drivetrain condition (clutch/gearbox) becomes more important at this level.
All figures shown are typical estimates based on aggregated Stage 1 data for this engine variant. Actual results depend on vehicle condition, mileage, and the chosen tuning method. We recommend discussing your specific vehicle with a qualified remap professional.
| Engine | BHP | Gain | Torque | Gain | Score |
|---|---|---|---|---|---|
| 3.0 TDI Quattro 204hp | 204 → 280 | +76 | 400 → 625 | +225 | Excellent (8/10) |
| 3.0 TDI FWD 204hp | 204 → 280 | +76 | 400 → 520 | +120 | Excellent (8/10) |
| 3.0 TDI 211hp | 211 → 300 | +89 | 550 → 650 | +100 | Excellent (8.5/10) |
| 2.0 TFSI Hybrid 245hp | 245 → 300 | +55 | 480 → 550 | +70 | Good (6.5/10) |
| 3.0 TDI 250hp | 250 → 300 | +50 | 550 → 650 | +100 | Good (7/10) |
| 3.0 TDI 258hp | 258 → 300 | +42 | 580 → 650 | +70 | Good (6.5/10) |
| 3.0 TDI 263hp | 263 → 300 | +37 | 580 → 650 | +70 | Good (6.5/10) |
| 3.0 TFSI 290hp | 290 → 435 | +145 | 420 → 535 | +115 | Excellent (8/10) |
| 3.0 TFSI 310hp | 310 → 435 | +125 | 440 → 535 | +95 | Excellent (8/10) |
| 3.0 TDI Bi-Turbo 313hp | 313 → 370 | +57 | 650 → 800 | +150 | Good (7.5/10) |
| 4.2 TDI 350hp | 350 → 400 | +50 | 800 → 950 | +150 | Good (7/10) |
| 4.2 FSI 372hp | 372 → 392 | +20 | 445 → 470 | +25 | Limited (3.5/10) |
| 4.2 TDI 385hp | 385 → 450 | +65 | 850 → 950 | +100 | Good (6.5/10) |
| 4.0 TFSI 435hp | 435 → 540 | +105 | 600 → 800 | +200 | Good (7/10) |
| 6.3 W12 500hp | 500 → 560 | +60 | 625 → 675 | +50 | Moderate (4.5/10) |
| 4.0 TFSI 520hp | 520 → 680 | +160 | 650 → 900 | +250 | Excellent (8/10) |
Get a personalised remap quote for your Audi A8. We'll connect you with a trusted professional in your area.
All figures shown are typical estimates based on aggregated Stage 1 data for this engine variant. Actual results depend on vehicle condition, mileage, and the chosen tuning method.
We recommend discussing your specific vehicle with a qualified remap professional before proceeding.
