didnt know they made a 1.9 zetec(or do you mean 1856cc,1.8) personally id go for the 2.0 ditch the injection and stick it on throttle bodys,add some uprated cams,a nice 4-2-1 manifold and system and a decent management and chip and bobs ya uncle you should be knocking on the door of 180bhp plus! and the 2.0 has more grunt!!!