Alfa Romeo 156 1997-2005 3.2 V6 GTA 246bhp remap figures
The Alfa Romeo 156 3.2 V6 GTA 246bhp (1997-2005) is a petrol 3.2L model making 246bhp and 300Nm as standard. After a Stage 1 ECU remap we expect 271bhp and 329Nm - up to 25bhp and 29Nm more than stock.
Choose your map
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 | 246 bhp | 271 bhp | +25 bhp |
| Torque | 300 Nm | 329 Nm | +29 Nm |
All maps at a glance
| Map | Power | Torque | Expected gain, up to |
|---|---|---|---|
| Stock | 246 bhp | 300 Nm | |
| Stage 1Maximum software-only performance | 271 bhp | 329 Nm | +25 bhp +29 Nm |
| Stage 1 EcoPerformance with economy in mind | 265 bhp | 327 Nm | +19 bhp +27 Nm |
| Eco mapEconomy first | 263 bhp | 325 Nm | +17 bhp +25 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 156
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.
This car is listed with a Bosch ME7.3.1 engine control unit. Older engine management is simpler to work with, but age matters: worn sensors, leaks and tired components can hold back what a remap delivers, which is why we run a diagnostic check first.
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 Alfa Romeo 156 3.2 V6 GTA 246bhp?
We expect 271bhp and 329Nm against 246bhp and 300Nm as standard: up to +25bhp and +29Nm. 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 Alfa Romeo 156 3.2 V6 GTA 246bhp?
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: 265bhp and 327Nm expected. The Eco map is economy first: 263bhp and 325Nm. Both still sit above the standard 246bhp and 300Nm.
Do I need to tell my insurer about a remap?
Yes. A remap is a modification, so you should declare it to your insurer.
More Alfa Romeo 156 figures
Other petrol variants
- 2.5 V6 192bhp 1997-2005
- 2.0 JTS 165bhp 1997-2005
- 2.0 TS 150bhp 1997-2005
- 1.8 TS 140bhp 1997-2005
- 1.6 TS 120bhp 1997-2005
All petrol 156 variants · 156 1997-2005 overview · All Alfa Romeo figures