To judge any cruiser ignore the odometer and age and just look at the condition / how it drives. Age does affect spec of course but quite often the general pros and cons of spec changes balance out.
I understand you don't want to spend more than you have to on fuel but you have said you'll adjust usage to compensate so imo the real world few mpg difference between diesel models shouldn't be a deciding factor. In my experience petrol models are not anywhere close to diesels on fuel economy. If you see an impressive real world figure for a petrol model I'd assume that if exactly the same driving was done in an identical spec but diesel cruiser it would do significantly better than the petrol it's just the way it is.
I have only owned 80's and 100's. If you don't need / want the off road awesomeness of an 80 I'd get a 100. If you need / want off road awesomeness then you have to buy an 80.
I understand you don't want to spend more than you have to on fuel but you have said you'll adjust usage to compensate so imo the real world few mpg difference between diesel models shouldn't be a deciding factor. In my experience petrol models are not anywhere close to diesels on fuel economy. If you see an impressive real world figure for a petrol model I'd assume that if exactly the same driving was done in an identical spec but diesel cruiser it would do significantly better than the petrol it's just the way it is.
I have only owned 80's and 100's. If you don't need / want the off road awesomeness of an 80 I'd get a 100. If you need / want off road awesomeness then you have to buy an 80.