Alfa Romeo 166 1999-2005 2.4 JTD 136bhp remap figures
The Alfa Romeo 166 2.4 JTD 136bhp (1999-2005) is a diesel 2.4L model making 136bhp and 304Nm as standard. After a Stage 1 ECU remap we expect 190bhp and 404Nm - up to 54bhp and 100Nm 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 | 136 bhp | 190 bhp | +54 bhp |
| Torque | 304 Nm | 404 Nm | +100 Nm |
All maps at a glance
| Map | Power | Torque | Expected gain, up to |
|---|---|---|---|
| Stock | 136 bhp | 304 Nm | |
| Stage 1Maximum software-only performance | 190 bhp | 404 Nm | +54 bhp +100 Nm |
| Stage 1 EcoPerformance with economy in mind | 177 bhp | 396 Nm | +41 bhp +92 Nm |
| Eco mapEconomy first | 172 bhp | 391 Nm | +36 bhp +87 Nm |
Who is the Stage 1 map for?
- Drivers who want stronger pulling power for overtaking, hills and towing, with no parts to fit.
- Daily and motorway drivers who want the engine to feel less strained at cruising speed.
- Anyone who wants the biggest software-only change we list for this engine.
What this means for your 166
Diesel remaps work mainly on boost pressure, fuel delivery and torque limiters, which is why the Nm gain is usually the figure you feel in everyday driving, particularly when overtaking or towing.
This car is listed with a Bosch EDC15C5 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 166 2.4 JTD 136bhp?
We expect 190bhp and 404Nm against 136bhp and 304Nm as standard: up to +54bhp and +100Nm. 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 166 2.4 JTD 136bhp?
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: 177bhp and 396Nm expected. The Eco map is economy first: 172bhp and 391Nm. Both still sit above the standard 136bhp and 304Nm.
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 166 figures
Other diesel variants
All diesel 166 variants · 166 1999-2005 overview · All Alfa Romeo figures