Alfa Romeo 166 JTD 2.4 Multijet (JTDm) 175 (+2003)
Engine Tuning in Bristol
Alfa Romeo 166 JTD 2.4 Multijet (JTDm) 175 (+2003) in Bristol. Standard and remapped figures for this exact engine.

- Fully dyno tested remaps
- 30 day money back guarantee
- Lifetime software warranty
- UK-wide local network
Remap stats
Alfa Romeo 166 JTD 2.4 Multijet (JTDm) 175 (+2003): standard vs remapped
Diesel engine. Indicative stage 1 figures, fully dyno tested.
Power
+38 bhp · +22%- Standard175 bhp
- Remapped213 bhp
Torque
+75 Nm · +19%- Standard385 Nm
- Remapped460 Nm
Tuning figures are indicative estimates, not guaranteed results. Actual results depend on the condition of the vehicle.
Prices from £130
Fully dyno tested | 30 day money back guarantee | Lifetime software warranty
Out of the box the Alfa Romeo 166 JTD 2.4 Multijet (JTDm) 175 (+2003) gives 175 bhp and 385 Nm. Remapped in Bristol, we record 213 bhp and 460 Nm, so 38 bhp and 75 Nm more, or 22% and 19% respectively.
These are indicative figures for a diesel Alfa Romeo 166 in good health. Your own results depend on the condition of the car.
Alfa Romeo 166 JTD 2.4 Multijet (JTDm) 175 (+2003): remap at a glance
- Fuel: Diesel
- Standard power: 175 bhp, remapped: 213 bhp (+38 bhp, +22%)
- Standard torque: 385 Nm, remapped: 460 Nm (+75 Nm, +19%)
- Service: stage 1 ECU remap, fully dyno tested
Diesel Alfa Romeo 166: what changes with a remap
Diesel engines respond strongly to remapping because the ECU controls injection quantity, injection timing and turbo boost pressure. Re-calibrating those maps typically brings the biggest improvement in mid-range torque, which is what you feel when overtaking or towing.
For reference, JTD and Multijet are the Fiat Group names for its common-rail diesel engines.
How the Alfa Romeo 166 JTD 2.4 Multijet (JTDm) 175 (+2003) compares
Of the 7 diesel 166 engines in our data, this one comes 1st for power gain, which is 2 bhp above the 166 diesel average of 36 bhp.
Across our whole catalogue the average diesel remap adds 34 bhp and 73 Nm, so this engine's 38 bhp and 75 Nm sits at or above that benchmark.
Book performance tuning for your Alfa Romeo 166 in Bristol
Based around Bristol, our team serves local drivers as part of the nationwide Remap Experts network. We regularly work with drivers in Keynsham, Portishead, Nailsea, Kingswood and Clifton and nearby areas of the South West.
All our remaps are fully dyno tested, backed by a 30 day money back guarantee and covered by a lifetime software warranty. Request a quote online or call 0800 779 7864.
If you are closer to Bath, Somerset and Gwent, those neighbouring Remap Experts sites can help too.

Want these figures on your Alfa Romeo 166 JTD 2.4 Multijet (JTDm) 175 (+2003)?
Tell us about your car and we will come back with a quote by SMS or phone.
Included
What we can do for your Alfa Romeo 166
Stage 1 ECU remap
Add power and torque and improve driveability. Software only, tailored to your engine.
ECU repair and testing
Is your engine control unit playing up? We can arrange testing and repair, and source replacement ECUs.
DPF and EGR fault repair
Persistent DPF or EGR errors diagnosed and resolved in accordance with all current road-legal standards.
Engine carbon cleaning
Fault finding and carbon cleaning for the inside of your engine, typically completed in a couple of hours.
From quote to remapped in four steps
No jargon and no pressure. Here is exactly what happens.
- 01
Find your vehicle
Choose your make, model and engine to see the standard and remapped power and torque for your car.
- 02
Request a quote
Send your details and we contact you by SMS or call back with a quote. No obligation.
- 03
Book with your local site
Your local Remap Experts site arranges the remap and answers any questions about your car.
- 04
Remapped and dyno tested
Your remap is fully dyno tested, with a 30 day money back guarantee and a lifetime software warranty.
Everything you need to know
Plain-English guides to how remapping works, what it does and what to check first.
- 6 min read
What is ECU remapping?
The engine control unit, what a remap changes, and who it suits.
Read guide - 5 min read
The benefits of ECU remapping
More torque, better driveability and the potential for better economy.
Read guide - 6 min read
How ECU remapping works, step by step
From reading the original software to the dyno test.
Read guide