Citroën C4 2.0 16v (2004 - 2005)

Name: Citroën C4 2.0 16v (2004 - 2005) chip tuning
Brand: Citroën
Price: 75.00 EUR
Availability: InStock

I (2004–2008) · 136 hp

Stage 1

E85

E85 + Stage 1

	Original	After tuning	Diff
Power hp	136	150	+14
Torque Nm	190	205	+15

Power gain

+10%

Torque gain

+8%

Ready to feel these +14 hp on the road?

Get your ready-to-flash Stage 1 file for the Citroën C4

Order tuning file →

Stage 1 file from €75

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 E85	Diff
Power hp	136	140	+4
Torque Nm	190	200	+10

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 €961 a year at the pump

Get your E85 adaptation file for the Citroën C4

Order tuning file →

File from €100

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

Fuel cost — E85 vs petrol −48%

Petrol · 100 km

~~6.3 L~~ · €13.47

E85 · 100 km

7.8 L · €7.07

You save ≈ €6.41 every 100 km — about €961 a year (over 15 000 km)

E85 uses ≈ +22% more litres, but the pump price (€0.909/L vs €2.123/L, France average on October 29, 2026) more than makes up for it.

🇫🇷 Version française : conversion éthanol E85 de la Citroën C4, calculateur d'économies par département →

	Original	After E85 + Stage 1	Diff
Power hp	136	160	+24
Torque Nm	190	220	+30

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.

+24 hp and €961/year saved — both

Get your E85 + Stage 1 file for the Citroën C4

Order tuning file →

File from €100

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

Fuel cost — E85 vs petrol −48%

Petrol · 100 km

~~6.3 L~~ · €13.47

E85 · 100 km

7.8 L · €7.07

You save ≈ €6.41 every 100 km — about €961 a year (over 15 000 km)

E85 uses ≈ +22% more litres, but the pump price (€0.909/L vs €2.123/L, France average on October 29, 2026) more than makes up for it.

🇫🇷 Version française : conversion éthanol E85 de la Citroën C4, calculateur d'économies par département →

Original ECU files for Citroen C4 Stock (ORI) files of this model · €20 per file →