I've been looking into the various tuning - mapping options for the JTD engine and put together the table below.
I've loved my 147 JTDm-140 for the last year. As we grow up (
) things change and the 147 wasn't suitable for the trip to scouts with a handful of kids, so I've had to bite the bullet and have gotten an 06 Multipla 120 JTDm. Apologies for bringing this up on the Alfa forum but I'v found the technical knowledge here fantastic.
I haven't gotten or driven the Multipla yet but assume that the drop from 140BHP-305Nm to 120BHP-205Nm is going to hurt.
Assuming that the data below I've picked off the internet is correct, why would the Alfa 115JTD and fiat 115JTD have such different torque outputs. 205 Fiat Vs 275 Alfa. If it purely is mapping, then why would the mappers not be able to bring the Fiat engine to the same as the Alfa without actually "tuning". And when mapped the Alfa and Fiat engines, one would logically think, should have the same torque outputs, but appear to be different - 263 Fiat Vs 325 Alfa.
The same goes for the Opel "JTD" versions. They seem to have similar outputs to the Alfas.
I suppose what I'm coming to is that I can't see any reason why my soon to be "90 mile a day overtaking artics on country roads" Multipla 120-JTDm (8V) daily ride can't achieve the same as a 147 120-JTDm (8V), including after mapping.
Hopefully there will be someone on here with knowledge to explain this.
Std-BHP Std-Torque BHP Torque Turbo
Fiat Bravo/Brava JTD-105 105 200 132 260 GT1544
Bravo/Brava JTD-110 110 200 GT1749V
Marea JTD-110 110 200 138 260 GT1749V
Multipla JTD-115 115 203 139 263 GT1749V
Multipla MJ-120 120 210 GT1749MV
Stilo JTD-100 100 200 GT1749V
Stilo JTD-115 115 255 145 300 GT1749V
Stilo MJ-120 120 255 GT1749MV
Stilo MJ-140 140 305 170 365 GT1749MV
Stilo MJ-150 150 305 GT1749MV
Alfa 156 JTD-105 105 255 140 315 GT1749V
JTD-110 110 275 140 330 GT1749V
JTD-115 115 275 145 325 GT1749V
MJ-140 140 305 170 365 GT1749MV
MJ-150 150 305 175 360 GT1749MV
147 MJ-120 120 280
Opel Astra 1.9CDTi 120 280 150 330 GT1749MV
150 320 180 380 GT1749MV