# Audi People - Problem 1 with my A4 1.8T **URL:** \ **Category:** PittSpeed Automotive\ **Created:** [April 11, 2008, 9:12am UTC](https://forums.speedlife.net/t/audi-people-problem-1-with-my-a4-1-8t/196751 "2008-04-11T09:12:00Z")\ **Posts on this page:** 1\ **Showing post:** 37
**Author:** ![kilmer420](https://avatars.discourse-cdn.com/v4/letter/k/d6d6ee/32.png) [@kilmer420](https://forums.speedlife.net/u/kilmer420)\ **Post date:** [April 18, 2008, 7:24am UTC](https://forums.speedlife.net/t/audi-people-problem-1-with-my-a4-1-8t/196751/37 "2008-04-18T07:24:59Z")
> [@Compression vs boost tradeoff](https://forums.speedlife.net/t/compression-vs-boost-tradeoff/35023/30): > > The 225 has the K04 turbo rather then the k03. Ko4 is a very popular upgrade for all audi/vw 1.8ts and 2.7ts. > > The 225 tt has stronger diverter valves, 6-speed manual rather than 5-speed, and the dual exhaust out the rear. I don’t think any internals are upgraded, but may be wrong. > > Either way you can easily put the k04 on the 180 and get over 225hp, but you can also just chip the 225 and get a decent boost in power. But you aren’t planning on doing any of that. Either way if you did get tired of the 180 after you got it, you could just chip it and get over 200hp out of it safely. That’s a different k04 then what they upgrade on the 1.8T’s. k04-015xxxx…the 2.7t’s have different k04 turbo’s also, they are very similar to the k04-020xxxx…lower compression as stated…bigger 20mm wrist pins…forged crank but not the strongest rods…the biggest difference is awd vs fwd and the TT225 makes it much nicer stock then a 180 even if both are AWD --- _[View the full topic](https://forums.speedlife.net/t/audi-people-problem-1-with-my-a4-1-8t/196751)._