Mercedes L Series or Kurzhauber" (short-bonnet) truck
Probably less than 5mpg ....
Looks cool BUT I wouldn't want the running costs or mechanical complication (as in everything is massively over engineered and thus heavy )
And a lot of these types of trucks will never see the terrain they are capable of operating on ....
Certainly not in the UK ....
And the thought of the cost of schlepping over to Morocco or something ...at the speeds they can usually manage .
Nahh thing I'll stay with what I've got Taa