The longest/widest thing I've transported is a few 8x4 sheets of plasterboard in a 7/9. Stuck out the back a foot or so but the weight of the tailgate and a bit of string between the latch and wiper held them. Don't think a 240 is wide enough to do that.
Heaviest things were a cast iron bath and about 300kg of concrete slabs, although not at the same time! It made the rear nearly sit on the floor like this:
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MY97 940 CD LPT Super Sports Edition 2 Turbo, Midnight Purple, 175,000 miles.