The 2.5L 4 cylinder was a Lima like the OBD1 and OBD2 2.3L Lima engines.
If you want specs, try the autos section at MSN.com and look up a Ranger or B-truck.
The Duratec has reported hwy mpg's over 30.
The 2.5L Lima rated at 117hp and the 2.3L Lima rated at about 112 in OBD2 form and about 100, or less, in 94-earlier form.
The 2.5L Duratec you mention is the v6 in the Contour clones that may not be in use anymore, that I remember.