Advice on buying a Volvo

It sounds like your repair costs have been pretty reasonable so far, a 940
will likely be cheaper just because it'll be much newer and have less wear
and deterioration, but in the long run if your 240 is in relatively good
shape it might not save you much. Personally I'd say it's a tossup and/or
depends on too many different things. If you can do some of the work
yourself either car can be kept running almost indefinitly rather easily, if
you have to pay someone else to do it, both are comparable to work on with
some things being easier on one and some easier on the other.