[quote=Ren]FWIW, a modern 500hp 911 Turbo has lower emissions than a 60hp, 46mpg 1986 Honda Civic. That’s what I call progress.[/quote]

Ren, I think you are missing the point. First, the only way “emissions” can be lower for the Porsche than the Honda is if you define “emissions” as not including CO2. The Porsche emits more CO2 by a factor of 5 or maybe even more.

Second, it is not just the “emissions” that is the problem (even if you ignore CO2), but the CONSUMPTION of the car.