6-bolt 4g63 engine (1st gen dsm motor) 2nd gen can be adapted to fit (7 bolt 4g64)
420A non turbo 2.0 or can put tsi motor in it but involves alot of time work and money
Stock these cars came with the non turbo 4G63 and a turbo version of the same motor. They also came equipped with a 4G37, which is a 1.8L motor that is smaller, more fuel efficient and less powerful...
If you extend the hood, and do some cutting on the fire wall..