YOU MAY think that if you splashed out $100,000 for a vehicle you would usually take delivery of something pretty flash—a Porsche, say. In fact, many buyers of wheels at that price care less about the badge on the bonnet and more about how much the thing costs to drive and how much weight it can carry. For this is also the price of a large lorry. These commercial vehicles, together with smaller trucks and vans, keep supply chains humming…