hi,
displacement.. the more you have, the better!
if you cant get more displacement, boost comes in

after change from a 1Y (1,9l n/a) to RA (1,6 turbo w/ic) engine in my new Audi 80 i was very disappointed about the torque at low rpms.
now i am going for the best of 2 worlds: 1,9 with garrett T3 turbo, with remanufactured motor & new turbo. pump's gonna be a 10 or 11mm plunger with higher camdisk.
greets, michael