Mh, I'm European, I have two "SUV", I see USA vehicles in USA, yes they tend to be bigger but not that much these days, we are not in the '60s anymore, that's n

Mh, I'm European, I have two "SUV", I see USA vehicles in USA, yes they tend to be bigger but not that much these days, we are not in the '60s anymore, that's not size the real difference but engines: USA engines are terrible, big in physical size/weight, far less powerful than EU one for their size and consumption. That's the substantial difference. A 4 liter Jeep can easy be towed by a 2 liter EU engine, one against the other, that's the point. Perhaps cheaper oil prices and lack of environmental regulations have made the industry far less interested in expensive engine research preferring just aesthetics and optional on board.