Audi A4 RS4 Ed 25th 2.9 Bi-Turbo (GPF)

Name: Audi A4 RS4 Ed 25th 2.9 Bi-Turbo (GPF) chip tuning
Brand: Audi
Price: 110.00 EUR
Availability: InStock

B9 Facelift II (09/2019–2025) · 470 hp

Stage 1

Stage 2

E85

E85 + Stage 1

	Original	After tuning	Diff
Power hp	470	510	+40
Torque Nm	600	780	+180

Power gain

+9%

Torque gain

+30%

Ready to feel these +40 hp on the road?

Get your ready-to-flash Stage 1 file for the Audi A4

Order tuning file →

Stage 1 file from €110

Exact price depends on the ECU — confirmed when you upload the file

✓ Original file back-up ✓ Delivered in ~30 min ✓ Support included

Power graph / Stage 1

PowerTorqueStock

	Original	After tuning	Diff
Power hp	470	530	+60
Torque Nm	600	800	+200

Power gain

+13%

Torque gain

+33%

Ready to feel these +60 hp on the road?

Get your ready-to-flash Stage 2 file for the Audi A4

Order tuning file →

Stage 2 file from €240

Exact price depends on the ECU — confirmed when you upload the file

✓ Original file back-up ✓ Delivered in ~30 min ✓ Support included

Power graph / Stage 2

PowerTorqueStock

	Original	After E85	Diff
Power hp	470	490	+20
Torque Nm	600	620	+20

E85 adaptation (no Stage 1)

Just the fuel switch: the ECU is adapted to run Superéthanol E85 (up to 85% bio-ethanol) with no Stage 1 chip on top. You get a small power bump from ethanol's higher octane (~104 RON) and a much cheaper fill-up. Flex Fuel file: the car still runs on regular petrol whenever you want.

Save €3 223 a year at the pump

Get your E85 adaptation file for the Audi A4

Order tuning file →

File from €100

✓ Original file back-up ✓ Delivered in ~30 min ✓ Support included

Fuel cost — E85 vs petrol −47%

Petrol · 100 km

~~21.9 L~~ · €46.02

E85 · 100 km

27.1 L · €24.53

You save ≈ €21.49 every 100 km — about €3 223 a year (over 15 000 km)

E85 uses ≈ +23% more litres, but the pump price (€0.906/L vs €2.098/L, France average on November 3, 2026) more than makes up for it.

🇫🇷 Version française : conversion éthanol E85 de la Audi A4, calculateur d'économies par département →

	Original	After E85 + Stage 1	Diff
Power hp	470	510	+40
Torque Nm	600	780	+180

E85 + Stage 1 remap

Chip tuning re-optimised for Superéthanol E85: the ignition and boost maps are calibrated to make full use of ethanol's higher octane (~104 RON). Bigger power and torque gains than either Stage 1 on petrol or E85 adaptation alone, plus the same cheap fill-up.

+40 hp and €3 223/year saved — both

Get your E85 + Stage 1 file for the Audi A4

Order tuning file →

File from €100

✓ Original file back-up ✓ Delivered in ~30 min ✓ Support included

Fuel cost — E85 vs petrol −47%

Petrol · 100 km

~~21.9 L~~ · €46.02

E85 · 100 km

27.1 L · €24.53

You save ≈ €21.49 every 100 km — about €3 223 a year (over 15 000 km)

E85 uses ≈ +23% more litres, but the pump price (€0.906/L vs €2.098/L, France average on November 3, 2026) more than makes up for it.

🇫🇷 Version française : conversion éthanol E85 de la Audi A4, calculateur d'économies par département →

Original ECU files for Audi A4 Stock (ORI) files of this model · €20 per file →