Originally Posted by ChrisC
First of all, as I said previously, a Prado/Colorado is more than capable of this trip 4 up and loaded. Just make sure you prep the vehcile well and replace the suspension if necessary.
100 series would be a great choice, but will be pricey.
You should be looking for economy also.
Sure you can buy an 80 series, and have a second tank fitted to give you 1000km.
You can also have the same tank fitted as Twobob mentioned, to a Prado, and have a 1600 to 1800km range.
Carrying loads of diesel isn't the real answer, I feel economy should also play a hand in "range"
The Prado has a 90 liter tank, and you can fit an additional 160 liter sub-tank, totaling 180 liters.
On tarmac, which will be most of your trip, you could expect 10km/liter, but loaded, I guess 8,5km per liter.