Consumption and SVA.
the short answer is yes! It went up from 13L/100km to 17L/100km. However for interest sake I also looked at our naturally aspirated company cruisers today:
105 Series Cruisers (averaged over 5 vehicles, at an average of 30,814km per vehicle) = 13.85L/100km. Twenty Miles Per Gallon. Running on a mixture of gravel and asphalt. The use of these cars is mixed gravel and asphalt - good, bad and down right ugly, and pretty comparable to overland type use.
Our two 79 series pickups averaged a rather shocking 21L/100km. Thirteen and a half miles per gallon! These are in pure off highway use, potholes and only saw asphalt when we bought them - also loaded up like hell!
When you say camper van, would a bed type arrangement in the back be enough do you think? Any idea where you would source speedo conversion kit?