MG 550 1.8L

2008–present · 130 hp · petrol

Stage 1

E85

E85 + Stage 1

	Original	After tuning	Diff
Power hp	130	140	+10
Torque Nm	168	185	+17

Power gain

+8%

Torque gain

+10%

Ready to feel these +10 hp on the road?

Get your ready-to-flash Stage 1 file for the MG 550

Order tuning file →

Stage 1 file: €95

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

Power graph / Stage 1

PowerTorqueStock

	Original	After E85	Diff
Power hp	130	135	+5
Torque Nm	168	175	+7

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 €898 a year at the pump

Get your E85 adaptation file for the MG 550

Order tuning file →

File from €100

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

Fuel cost — E85 vs petrol −46%

Petrol · 100 km

~~6.1 L~~ · €12.87

E85 · 100 km

7.6 L · €6.89

You save ≈ €5.98 every 100 km — about €898 a year (over 15 000 km)

E85 uses ≈ +25% more litres, but the pump price (€0.909/L vs €2.122/L, France average on October 29, 2026) more than makes up for it.

🇫🇷 Version française : conversion éthanol E85 de la MG 550, calculateur d'économies par département →

	Original	After E85 + Stage 1	Diff
Power hp	130	155	+25
Torque Nm	168	205	+37

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.

+25 hp and €898/year saved — both

Get your E85 + Stage 1 file for the MG 550

Order tuning file →

File from €100

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

Fuel cost — E85 vs petrol −46%

Petrol · 100 km

~~6.1 L~~ · €12.87

E85 · 100 km

7.6 L · €6.89

You save ≈ €5.98 every 100 km — about €898 a year (over 15 000 km)

E85 uses ≈ +25% more litres, but the pump price (€0.909/L vs €2.122/L, France average on October 29, 2026) more than makes up for it.

🇫🇷 Version française : conversion éthanol E85 de la MG 550, calculateur d'économies par département →

Original ECU files for MG 302 stock (ORI) files · €20 per file →