I signed up on “Fred’s TDI” page at “tdiclub.com” many years ago, just to get information on the TDI Passat. I think you should at least visit there to learn more. The users even have a big in-person shindig every so often, not too unlike what Saturn or Harley owners do, minus the factory.
Fred’s own goal was to get a TDI Golf when they eventually came out. He also expected to marry his girlfriend, it appeared, at the time.
I think he only successfully got his Golf. :-)
TDIs are a solid choice, but beware the loss of oil between changes that seems to happen for some.
They have a club? I will check it out. Maybe Fred’s still single?!