Timing belt on '92 S4

[Dave Brady <brady@husc.harvard.edu>]

I saw, while reading the Bentley book, that the recommended interval for
the timing belt is 90K miles (yes, ninety-thousand)!

That seems like an awfully LONG time.

I figured when I bought the car, with 74K, that I would change it, but I
certainly don't relish the job.  Are Audi's timing belts really strong
enough to last?

Thanks!

Dave