Also, the e30 318's have a 4 cyl engine whereas the 320's have a 6-cyl. If this is the same with e36's, then the 318 will rev faser being a four, and so be just as peppy off the mark and around town, but the 320 will have longer legs, and more torque for that ever-important 80-120km/h time.
e30 318's are very closely matched to 320's esp. for town driving even though there is some hp discrepancy.