The 150 bhp Golf has the KO3 Turbo, the 180bhp Golf has the KO3s Turbo and cars such as Audi S3's, Leon Cupra 225bhp has the KO4 turbo, pretty sure exactly the same engines, just different turbo's.Jon
shocking how many of you don't know the differences and dishing out wrong advice its all here http://www.golfgtiforum.co.uk/index.php?topic=40194.0
I must warn you I'm about as decisive as a 5 yr old in a sweet shop!!