Remapping the Alfa Romeo 159 (2005), 2.0 JTDm 170HP.
The Alfa Romeo 159 (2005)'s 2.0 JTDm 170HP responds evenly to remapping, with BHP rising 17.6% to 200bhp alongside a closely matched 18.1% torque increase to 425Nm.
Turbocharged diesels are the classic remap candidate, and this impressive improvement is felt mainly as a stronger mid-range, with less need to work the engine hard to access the extra performance. These figures apply to 2005 models.
Typical remap gains for the 159 2.0 JTDm 170HP
Standard vs Remapped
Standard vs Remapped
- Power: 170bhp standard, 200bhp after a Stage 1 remap.
- Torque: 360Nm standard, 425Nm after a Stage 1 remap.
- This is a balanced gain: power and torque increase by a similar margin, rather than one outpacing the other.
- This is a turbocharged engine, which typically means further headroom exists beyond Stage 1 if hardware is upgraded.
- As a diesel, the practical benefit is mainly felt as stronger pulling power for towing and motorway overtaking.
- These figures apply specifically to 2005 models.
- These are Stage 1 figures only, achieved without any hardware changes.
Questions about remapping your 159 2.0 JTDm 170HP
How much power and torque does a Stage 1 remap add to the Alfa Romeo 159 (2005) 2.0 JTDm 170HP?
A Stage 1 remap typically takes the Alfa Romeo 159 (2005) 2.0 JTDm 170HP from 170bhp to around 200bhp, and torque from 360Nm to around 425Nm. This is a impressive gain achieved entirely through software, with no hardware changes required.
Is the Alfa Romeo 159 (2005) 2.0 JTDm 170HP a good candidate for remapping?
Generally, yes: as a turbocharged engine it has the headroom to respond well to a quality remap, and the impressive gain shown here reflects that. The main caveats are condition, not the engine itself, a healthy service history, no outstanding fault codes, and (for diesels) a clear DPF and EGR are what actually determine whether this particular car is ready for a remap.
Will remapping affect the warranty on my Alfa Romeo 159 (2005)?
A manufacturer can only void the parts of a warranty that the remap directly affects, not the entire vehicle, under the Consumer Rights Act and EU Block Exemption principles. In practice, on a Alfa Romeo 159 (2005) 2.0 JTDm 170HP this usually means engine and transmission-related claims are the ones worth discussing with a reputable tuner before booking.
What should I check before booking a remap for my Alfa Romeo 159 (2005) 2.0 JTDm 170HP?
Before booking, confirm the tuner uses a custom or bespoke file rather than a generic off-the-shelf map, ask whether they do a pre-remap health check, and check service history and mileage on your specific Alfa Romeo 159 (2005). For a diesel like this one, also check the DPF and EGR are in good working order, since a generic remap on a struggling emissions system is where problems tend to start.
What's the difference between a Stage 1 and Stage 2 remap for the 2.0 JTDm 170HP?
Stage 1 is software-only and is what the figures on this page reflect. Stage 2 builds on that, but on a turbocharged engine like this, Stage 2 usually adds further gains but requires supporting hardware such as an upgraded intake or exhaust, so it is a separate conversation with a tuner rather than an automatic next step.
Will remapping my Alfa Romeo 159 (2005) affect my insurance?
Yes, always, a remap is a modification and must be declared to your insurer regardless of size. Given this impressive gain on the 2.0 JTDm 170HP, expect a likely premium increase, and it is worth getting a quote from a specialist modified-vehicle insurer before booking the remap itself.