Euhm okay.. this can be a long answer.. but it isn't

3 door and saff 2wd = red top engine
first saff 4wd's = red top engine (I think)
saff4wd = green top engine
escort cos = blue top engine

Always use unleaded ron97 (98 or more) fuel

As far as I know there hasn't been a facelift from the first 2wd in 88 till the last 4wd at the end of 1992 (or beginning 1993). They've changed the front sidelights to white and the rearlights to smoked, and the 4wd has a hood with vents.

Although all this information is not that relevant, since everyone can change the rockercover, boot, lights anyway

Good luck.