In reply to Tyler:
Doesn't so much matter if it's a car type - all the van derived cars (including the really big ones) take the higher car speed limits. No, there's no sense in that, but that's the way it is.
Given the way modern vans are (and given how they tend to be driven anyway) I would think it would make sense to make vans up to 3500kg the same speed limit as cars.
So if the OP is bothered about this, they should perhaps choose the car version of a Berlingo, Doblo etc and just leave the seats down!
Neil
Post edited at 13:56