Catalog/ Cars/ Audi/ A4 Cabrio

Audi A4 Cabrio S4 4.2 V8

Name: Audi A4 Cabrio S4 4.2 V8 chip tuning
Brand: Audi
Price: 100.00 EUR
Availability: InStock

B7 (2006–present) · 344 hp

Stage 1

Stage 2

E85

E85 + Stage 1

	Original	After tuning	Diff
Power hp	344	365	+21
Torque Nm	410	430	+20

Power gain

+6%

Torque gain

+5%

Ready to feel these +21 hp on the road?

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

Order tuning file →

Stage 1 file from €100

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	344	380	+36
Torque Nm	410	445	+35

Power gain

+10%

Torque gain

+9%

Ready to feel these +36 hp on the road?

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

Order tuning file →

Stage 2 file from €100

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	344	360	+16
Torque Nm	410	430	+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 €2 372 a year at the pump

Get your E85 adaptation file for the Audi A4 Cabrio

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

~~16.1 L~~ · €33.68

E85 · 100 km

19.7 L · €17.86

You save ≈ €15.82 every 100 km — about €2 372 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 Cabrio, calculateur d'économies par département →

	Original	After E85 + Stage 1	Diff
Power hp	344	395	+51
Torque Nm	410	460	+50

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.

+51 hp and €2 372/year saved — both

Get your E85 + Stage 1 file for the Audi A4 Cabrio

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

~~16.1 L~~ · €33.68

E85 · 100 km

19.7 L · €17.86

You save ≈ €15.82 every 100 km — about €2 372 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 Cabrio, calculateur d'économies par département →

Original ECU files for Audi 8 331 stock (ORI) files · €20 per file →