Here we go utter nonsense etc I’ve had a smaller van which I had for 6 years,it was a good van when I was carrying less water but when I had it full up with 500 litres it was to much for it. It felt unstable and tbh in wet or winter conditions it felt unsafe when full. I have a transporter now and when my tank is brimmed I hardly know it,my advise to anyone starting out and considering WFP long term would be get a medium sized van if your thinking of carrying 500 upwards,smaller vans are fine with less weight don’t forget a lot of the smaller vans have the same shock and suspension and brake setup as there car brothers and sisters.
Correct
its pretty obvious to me, a van with a higher payload will carry the load much easier than a smaller van right on its payload limit. Like you said a lot (not all) smaller vans are car derived, same suspension, brakes and engine.
If you dont want a larger van, thats fine as long as its legal theres no problem but if you can i would always get the biggest van available. Less wear and tear, will hold the road better etc.
Imagine a skinny little chap with twig arms and legs walking up the street with a sack of spuds on his back vs a big bodybuilder type with a sack of spuds on his back, who is going to carry the load easier?
Its just common sense really.