You are pretty much correct George, the basic 1.8 engine is multi-platform and
was given the turbo mod for the TT. VW & Audi have an enviable reputation for reliability but I dont know of any kind of formal survey that has been done. I dont see why a good engine should not go on for a good few hundred thousand km's before needing major overhaul. Not too familiar with turbos though and couldn't say if they are higher maintenance (I have a suspicion about this though).
Sadly I have not had too much of that general reliability with my car and if you read the recent threads (here & here) you will get an idea of what has gone wrong . My car has a FSH with the local dealer from the word go and is only approaching 60 000km. I have also just put in a new flywheel and clutch plate assembly (I suspect the previous owner was a little rude to the gearbox).
B)
Apart from a few other small (not engine related) issues, I love my car and got no intention of letting it go so easily. It is a great car to drive, good fun and a solid build, to say nothing about the distinctive styling. I am still a major fan and a somewhat aggressive driver!