Facelift 2.5i v 2.5si, how to tell the difference?

[mr wilks]

2.5i with a map will be close in terms of performance so don't be too put off if you can find a well specified 2.5i, which is what I did

:? i wouldn't imagine a map on a na 2.5i would add enough torque/ bhp to even notice :? bit like the difference between 95ron & 99ron , a little sharper on throttle , no significant power increase .

 

[JamesClements]

2.5i with a map will be close in terms of performance so don't be too put off if you can find a well specified 2.5i, which is what I did

:? i wouldn't imagine a map on a na 2.5i would add enough torque/ bhp to even notice :? bit like the difference between 95ron & 99ron , a little sharper on throttle , no significant power increase .

I had a quantum map on mine there a small difference in torque but your right its not a whole lot

 

[Zedebee]

I like the idea of the 2.2 as a "toe in the water" option, however if the running costs are similar and the capital's there for a larger-displacement model (which, given the apparent fact that these are right at the bottom of their depreciation curve could be recovered on resale) it seems there's not a lot to going for the smaller one.

There are relatively few 2.2 cars about and there isn’t a lot between them and 2.5 cars price wise. The 3.0 carries a significant premium. For me the 2.5 is the best market to fish in for a Z4 newbie. For sure if you enjoy the Z4 experience, you will probably want to trade up at some point, but that will give you an excuse to buy your second Z4. :evil:

 

[Mike6]

At my last service, I fitted a sports air filter (not K&N) with foam filtration and did notice initially that car pulled away stronger than before . Will not have added to top end performance but being able to breathe easier seems to have made it more responsive.

 

[spammy]

hi all i think you'll fined that all 6 pot engines were made in Germany and shipped to the USA to be put in to the z4

 

[Enigmatik]

I have a 2.5 facelift, think easiest way to check might be rear brakes. The 177bhp model seems to be the only one with solid rear discs I think. I@m refurbing some brakes from a 3.0si at present to do an update. If I can get a manifold and DISA valves down the link I might investigate whether I can find the other 40bhp with a remap. I think when it comes to z4's it's getting to the point where buying on condition is the best idea. I looked at ropey 2.5si and 3.0 before I bought mine. It wasn't the colour or engine I ideally wanted, but I've enjoyed every drive in it and slowly updating bits as I go.