Hey...
Well I have driven the 660cc version of Terios.. but its not fun to drive! a bit slow and less pick-up!
And.. with petrol average.. you can take 350-400km per tank easily... I mean I can push it 450 in my 1300cc Terios manual... only front wheel normally... depends on how you drive...
I would recommend you to go 1300cc one if you can get it...