I have a 2005 A4 with the 1.8 turbo and have been thinking about doing some upgrades to take the engine to around 250hp but don't want to loose any dirveability or fuel economy. Any suggestions? I am currently stock.

 

There are lots of threads on this subject. You will want to chip the car first to get most bang for your buck. The two major companies are APR and GIAC. Start with a search on the forums for them.

 

Is it 250chp or 250whp you are looking for?

You can get one with a K04 and the other you will want a GT28rs or an Elim kit if your looking to keep it "stock looking" under the engine bay.