Sizewell, mine sounds very much like a V6. I have never seen less than 19mpg even on a 2,000ft high 45 minute twisty mountain drive at high revs using just 3rd & 4th gear constant.
Sounds as good as a Busso after 3500rpms, there's not 1 person on here that has bought a V6 Brera & started a thread without talking about how addictive the sound is. I would suggest a remap, an exhaust change, also swap the paper airfilter element for something better than OEM
Chains, tensioners, sprockets, front pulley, K&N filter, Trailing arms bushes all done. All Differential bushes & discs all round changed. Tracking not touched as new P zero's still look new at 8000 miles. On a long run consumption now settling out at 28 mpg and not especially trying to achieve it. However, when I want a bit of "Fun", that's when it comes unstuck. Can't believe these camshafts can advance/retard 50 degrees? I can understand it on a light, low geared, high revving engine like a Ferrari but not on a beast such as the Q4. Seems to me, the only thing stopping this engine blowing itself to bits is the anti-knock devices. So what is the point of having such huge advance/retard ranges when it gets so far out of kilter that the anti-knock ensures the ECU just claws back the timing. Thats why when I lift, the "Pinking" is reduced and the ECU then applies timing more suited to the engines inertia - drag if you like. Timing; such that this engine has, is fine when there is no load on it, but completely unsuited to 1700 kilos~ Just got to touch the throttle lightly at 2300 to 2700 RPM and it morphs into a TVR V8. I hate it. Everything else about the car I love to bits. But this is just torture.
Finally got all my bits; Transducers, new modified Oil Cooler/Filter Unit, stainless pipework, non return/check valves and ready to go next week - been waiting for ages. Even had time to pick up a spare Brera engine; 46,000 I was told, because this wonderful piece of Alfa engineering suffered chain failure??? Got it cheap so wasn't to painful and broke the monotony of waiting to get all my bits done by people who are incredibly good at what they do. Trouble is there aren't enough in Britain so they are always in demand. Got all my test equipment together so should be able to take some figures and a friendly chap - local engineer - lent me a very nice programmable oil pressure switch - see if this is of any use to you? You bet.
I do believe this 3.2 is capable of being a great engine but not in it's standard guise. So we will see if indeed it can be improved upon. And I believe it can. And if it can't, there will be another Q4 for sale; and a lot of bits and bob's from an abandoned project. Convinced it can work better though.
Would be nice to know where I can get some re-mapping done?