Originally Posted by Noisy Boy
heard more good things about 1.6 then 1.9, you can get the same about of power out of 1.6 as if you was using 1.9
That is because you still use the same head as the 1.6 on the 1.9. The turbo is forcing air into the engine so the capacity doesn't really make much of a difference to a forced induction engine. It only has benefits off boost.