@antoine: the engine and the most other technical parts at the saab 9000 were coming from the opel omega.

by the way: the well known and reliable diesel-engines of the volvo's from the 80ies are original volkswagen. they were coming from the lt-transporter. a swedish friend has shown me the vw/audi-badge on the engine of his father's 500 000 km-volvo 740 diesel.
and he told me, that it was -still is?- forbidden, that a vw-garage makes some repairs. you had to go to volvo.