I have just bought a 2.4 Brera early 07, really enjoy the drive, I got the tracking done and put 43 PSI in the front and 40 in the back (I have Bridstones and they recommend putting a bit more air in for motorways). I have been driving a bit quick mainly on motor ways.
On the trip the first 150 miles I estimate the cost was about £25 (quarter of a tank) and the trip tells me I am getting 37 mpg so the trip looks pretty accurate when you do the calcs.
Now I expected better mpg for a diesel so I was thinking about getting the Diesel Particulate Filter by-pass, the Exhaust Gas Recirculation valve delete and the remap. My car had a new manifold fitted this year part number 55210197 apparently this makes a 210bhp car?
Any way because I do mainly motorway driving I am wondering if I should just go for the re map. My understanding is that if I later I go for the hardware mods then I will have to go for a further re map effectively paying twice.
So I am looking for evidence that I would benefit from the hardware mod bearing in mind I do mostly motorway driving?
Can any one help?
Also is there a view on what fuel I should use?
You are in the same boat as me, came for a 1.9 JDTM GT (no DPF) , that was giving nearly 50 mpg with a careful right foot, and went to a 2.4 Brera, and horrified with mpg (albeit on short journeys)
Done my research and spoke to a couple of indies
DPF removal - if you do mostly motorways it should regen fine
EGR - a software remap will disable this, the EGR is an issue, disabling the EGR will remove a load of potential issues
I think its the remap that will mostly improve mpg ( a regen hits consumption), BUT if your DPF fails - you will face a hefty bill!!!
An indy has suggested having a conservative remap done, that would suit me
If you have the remap done, but no DPF removal, and your circumstances change, and want the DPF removed, then it will need to be remapped
I would suggest talk to all of the indy alfa specialists, get their advice, I also found out some other things in my research, but PM for more info
Avoid supermarket fuel, it may not have the additives needed for the 2.4