[DW42]

I agree with what's been said by others: newer is better when it comes to 240s. From about 1989 they had better rust protection, and the Bosch LH fuel injection systems are robust. The KE-jet injection on some models is also very good as long as you take care of air leaks in the intake and injector seals. It's my understanding that if the injection electronics fail on these they default back to operating as mechanical K-jet and run normally, if less efficiently.

The problem with 240s is that they have become too expensive to buy. They are no longer a cheap answer to comfortable and reliable motoring. For that it's best to look elsewhere -- Toyota and Mazda estates from the early to mid 2000s perhaps.

For a vintage yet still somewhat practical Volvo driving experience I like 140 series Volvos up to 1972. An ideal setup for these is a B20B motor, M41 manual, and an upgrade to modern electronic ignition. But good examples don't come cheap and are uncommon.