Hugh & Gavin,
I agree that diesels are the way to go in the future, but the car makers have a big up-hill battle to convince most Americans that the old noisy, stinky diesels of the 70's and 80's are gone and the new breed of diesels are way better. Diesels have been very popular in Europe for many years, but when the diesels were introduced to the US market by the likes of the old GM/Oldsmobile 350 diesels and the VW Rabbit, it left a very bad tastes in their mouths and may be very hard to overcome those memories
My original comment was that 180 HP is not enough power for a 4300+ lbs truck regardless if it was a diesel or gasoline engine, but I think the cost of fuel will reduce power in a lot of vehicles and we will see a lot more small engined vehicles. I also think a 4 cylinder diesel engine in a VW will bring back too many bad memories of the 1980's VW Rabbit diesels. More power to VW if they can pull it off, but it will take a marketing miracle to change most Americans perceptions of small diesel engines.
...Rich