1992 Audi 100S Engine type?

["Johnson.Walker" <johnso17@niehs.nih.gov>]

My Audi's main external belt broke when my son was returning from
Wilmington, NC to take it to fix the transmission problem I reported on the
list 2 weeks ago. It was running in "limp" mode and shows 64,000 miles on
the odometer. My son said it shut down immediately and he had it towed to
the Audi Dealership/Service department in Raleigh, NC. They have called me
with the report that the internal timing belt is broken, as well, and there
could be major internal problems. This is my first experience with an Audi,
can anyone verify that this model's engine is an interference style engine,
it's hard for me to believe? Also, is it possible that the transmission
being in limp mode could contribute to/cause this problem? Thanks, Walker