Stage 1 · Petrol

Vauxhall Vectra (C) 2006-2008 1.8 VVT 138bhp remap figures

Stock, this 2006-2008 Vauxhall Vectra petrol (1.8L) produces 138bhp and 175Nm. Our expected figures for a Stage 1 remap are 152bhp and 191Nm, an expected gain of up to 14bhp and 16Nm.

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Stage 1 remap figures

A Stage 1 remap is a software-only change to the ECU on an otherwise standard car. It needs no extra parts, which makes it the usual starting point.

	Stock	Vanguard expected	Expected gain, up to
Power	138 bhp	152 bhp	+14 bhp
Torque	175 Nm	191 Nm	+16 Nm

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All maps at a glance

Map	Power	Torque	Expected gain, up to
Stock	138 bhp	175 Nm
Stage 1Maximum software-only performance	152 bhp	191 Nm	+14 bhp +16 Nm
Stage 1 EcoPerformance with economy in mind	149 bhp	190 Nm	+11 bhp +15 Nm
Eco mapEconomy first	147 bhp	189 Nm	+9 bhp +14 Nm

Who is the Stage 1 map for?

Drivers who want a sharper throttle and a small, honest gain from software alone.
Owners who would rather keep the car standard in every other way.
Anyone who wants the fullest software-only map for this engine, accepting that the gain is modest without a turbocharger.

What this means for your Vectra

Without a turbocharger the improvement comes from ignition, fuelling and throttle mapping rather than boost, so expect a smaller but still noticeable change in response.

Engine management is by a Siemens Simtec 75 unit. We read the ECU on your car and compare it with the software listed here before any work starts, so you know what to expect before you commit.

We remap at our Belgrave Gate workshop in Leicester, or at your home or work within 30 miles, and every job starts with a diagnostic check.

Please note: these are expected figures, not guarantees. Real results vary with the condition of the vehicle, the ECU software version, fuel quality and the hardware fitted. Some options - including Stage 2 and anything that needs extra hardware - are for off-road or competition use only. We check every vehicle first and confirm what is achievable before any work starts.

Figures reviewed 22 October 2026.

Stage 1 questions

How much power does the Stage 1 map give the Vauxhall Vectra 1.8 VVT 138bhp?

We expect 152bhp and 191Nm against 138bhp and 175Nm as standard: up to +14bhp and +16Nm. These are expected figures, and we confirm what is achievable on your own car after a diagnostic check.

Does a Stage 1 remap need any extra parts on the Vauxhall Vectra 1.8 VVT 138bhp?

No. Stage 1 is a software-only change to the ECU on an otherwise standard car.

Is there a gentler map than Stage 1 for this engine?

Yes, two. Stage 1 Eco is performance with economy in mind: 149bhp and 190Nm expected. The Eco map is economy first: 147bhp and 189Nm. Both still sit above the standard 138bhp and 175Nm.

Do I need to tell my insurer about a remap?

Yes. A remap is a modification, so you should declare it to your insurer.

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