Catalog/ Cars/ Audi/ S3

Audi S3 S3 1.8T

Name: Audi S3 S3 1.8T chip tuning
Brand: Audi
Price: 85.00 EUR
Availability: InStock

8L (1996–2003) · 225 hp

Stage 1

E85

E85 + Stage 1

	Original	After tuning	Diff
Power hp	225	250	+25
Torque Nm	280	400	+120

Power gain

+11%

Torque gain

+43%

Ready to feel these +25 hp on the road?

Get your ready-to-flash Stage 1 file for the Audi S3

Order tuning file →

Stage 1 file: €85

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

Power graph / Stage 1

PowerTorqueStock

	Original	After E85	Diff
Power hp	225	235	+10
Torque Nm	280	295	+15

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 €1 558 a year at the pump

Get your E85 adaptation file for the Audi S3

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

~~10.5 L~~ · €22.02

E85 · 100 km

12.8 L · €11.63

You save ≈ €10.38 every 100 km — about €1 558 a year (over 15 000 km)

E85 uses ≈ +22% more litres, but the pump price (€0.906/L vs €2.097/L, France average on November 3, 2026) more than makes up for it.

🇫🇷 Version française : conversion éthanol E85 de la Audi S3, calculateur d'économies par département →

	Original	After E85 + Stage 1	Diff
Power hp	225	265	+40
Torque Nm	280	430	+150

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 €1 558/year saved — both

Get your E85 + Stage 1 file for the Audi S3

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

~~10.5 L~~ · €22.02

E85 · 100 km

12.8 L · €11.63

You save ≈ €10.38 every 100 km — about €1 558 a year (over 15 000 km)

E85 uses ≈ +22% more litres, but the pump price (€0.906/L vs €2.097/L, France average on November 3, 2026) more than makes up for it.

🇫🇷 Version française : conversion éthanol E85 de la Audi S3, calculateur d'économies par département →

Original ECU files for Audi S3 Stock (ORI) files of this model · €20 per file →