Well, the US and European Escort shared almost NOTHING in common. We started making Escorts from 1963, you started in the 80's ('81 iirc). The first two we made were RWD with either 1.6 litre X-flow OHV or 1.6 Pinto OHC engines, followed by the RS1600, RS1800 and RS2000's, which used 1.6 and 1.8litre OHC engines from Cosworth, and the 2.0litre Twin Carb Pinto engine. Mk3 escort made in 1980 to 1985 was FWD and used 1.3 to 1.6 litre CVH engines, with the optional K-Jetronic Fuel Injection (XR3i) or the RS Turbo option. Mk4 (86 to '91) was just a facelift, and didnt change a lot other than looks. Mk5 ('91 to '00) was a facelift again, but carried over the CVH engines in the early part of the range before switching to the 1.6 or 1.8 litre ZETEC engines and the one off 2.0 for the RS2000 and RS2000 4x4. It was facelifted again in '96 for a final time.
Escort Cosworth is based off the pre-facelift Mk5 in terms of looks and interior, although its a custom shell built by Karmann - uses the Sierra 4x4 floorpan rather than the Escort Floorpan.
Escorts were removed from the range in 2000, two years after the introduction of the Focus which was designed to replace it, with the 6,700,000th Escort rolling off the Halewood assembly line shortly before the plant closed.
Go have a look here for more:
http://en.wikipedia.org/wiki/Ford_Escort_(European)