2.3 or 2.5 petrol engine

My 84 110 probably has had an engine swap. How can I tell if it is a 2.3L or 2.5L? Thanks

Engine #.

:D

Find out here (among many other places on the internet):

http://www.glencoyne.co.uk/engno.htm

I found the serial number and it has been defaced with a tap welder. Obviously stolen at one time