out of the escort and fizzy, i would say the fiesta engine, reason being that there is no air flow meter to arse around with, and the fiesta runs electronic fuel injection.

out of the 2.0 and 1.8 zetecs, it has got to be the 2.0, larger capacity more torque


but out of the lot for a straight engine drop for the xr2 i would say go for the zetec a shit load of torque for a small light car, it would be fast!