If 900S is same model as here in Sweden then it's 147hp light pressure turbo. That is IMHO the best engine. Torque is abundant but engine is not so hi-strung that transaxle suffers. Also, it has THE best sound of all 4-cylinder engines ever, due to uneven length header and only one muffler.
I have bought one for 400$, tuned it to 260hp and drove it both on track and town until rust ate the body. It was one of those cars that just refused to die.
P.S.
OK, I blew one head gasket and one primary transmission chain. But that was at the end, running on E85 and boosting a lot.