As we all know, fuel savings are approx. 1/3rd
If you don't need the space of day trips out, why wouldn't you take the 3.2 (or 2.2)?
Reason this has all kicked off, is the pram won't fit in the boot of the 2.2 as some idiot put a larger 90L tank in there.

So, either put a smaller tank in. Or call it time on the 2.2 and gas the 3.2, with 80L setup where pram (after testing yours) should fit.
At CostCo the pram and cot bit thing went in the 3.2, but sod all room for anything else. Squeezed shopping in, but fek all room for anything else really. Given
crap stuff we haul around.
When I gassed the 2.2, I was doing almost 30k a year, now, it's more like 10k tops. So payback time is an issue now.
So the Estate is needed, I'll take that on and do a little TLC on it.
But problem is, keep 2.2 or gas 3.2

That said I don't really want to spend £800 on gass'ing it. At the end of the day, it's going to be worse on fuel than my 2.2 and it's going to take an age to pay back.