Vauxhall Astra (J) 2009-2016 1.6 16v Turbo 177bhp remap figures

Who is the Stage 1 map for?

• Drivers who want a noticeably quicker car from a software-only change, with no new parts.
• Daily drivers who want stronger mid-range pull and a sharper throttle.
• Anyone who wants the biggest gain we list without fitting hardware.

What this means for your Astra

Turbocharged petrol engines respond well to calibration changes: boost and timing are the main levers, and the result is a flatter, stronger torque curve as well as a higher peak.

This car is listed with a Delco E83 engine control 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.