I would disagree with the above, as having driven, and bought a variety of transits, i am the happiest with my current 52 plate 125 tdci t280 fwd transit. I had an 07 115 t330 swb rwd from new with a 70 mph limiter, and it was poor on fuel, i had an 02 125 t330 swb rwd, and got 400 miles to a tank, and the 75/85 ps fwd are ok, but lack the grunt when loaded for motorway work.
A lot of people in the trade who deal with transits say the mk7 are worse on fuel then the old mk6 shape, and cost more to fix aswell.