Does Audi Recognize the 5000?

[George Harris]

I was just scanning the official history of Audi put out by Audi, and I
found 80's, 90's, 100's, and 200's, but no 4000's nor 5000's. What
gives? Are the 4000's and 5000's just rebadged 100's or something?

In the same book there was a write up about the TDI. It started out in
an '88 with 80 hp, and was listed last in an A8 ('94 I think) with 140
hp. I would love to have the economy of the diesel but can't live
without the get up and go of the gas Turbo in the 5000. Anyone who
commutes on high speed highways knows what a life saver the ability to
get up to highway speed is when merging.

Has anyone seen the higher horsepower TDI's available on the used
market? Can they be fit into the 5000 Quattro retaining the running
gear? Can the older TDI's be upgraded to the higher power?

Cheers
George