One of the Savannah River Pilots just bought the Mercedes Unimog a couple of weeks ago. I think he said it is 130 or 150 HP. The tires have about a 42 inch diameter. It's quite a truck. Even has night shades, NATO running lights, gun turret on top of the cab, snorkel for deep water and a host of other goodies. I'd like to have one on the farm but highway... ... . he said it only runs 52 mph top end.