Originally Posted by mkt
I won't necessarily agree about deiesels being the more polluting... the new generations of diesels on sale in Europe and Japan are among the cleanest engines around. You should check out some of the Euro CO2 ratings... the dirtiest car sold in Europe right now is the Gas powered Dodge Ram (yes... someone at DCX thought it was profitable to export them)
I agree. But that's because manifacturers spent more money on cleaning up diesels. From a thermodinamic point of view, a gas engine has better, cleaner combustion, so you can't beat that. Of course, it all depends on how much one is willing to spend and what kind of emission control parametrs are imposed.