You always need to shed that extra amount to make your car off road compatible. Well said, anything without 4x4 is a waste to venture, besides your suspension needs the lift, bigger off road tyres, strong body and chasis. Well Fortuner closes on to that, but not sure how it shove itself out of the dunes and push you out of the sand. Off road are typically different and are made that way, and to fiddle with some passenger car will be like asking too much. Anyone who hv tried can post his experience.