[christofoo]

Phil, is there a mistake in your 32MPG figure? I know you're using a formula I'm not familiar with, so I'm just asking you to double-check, but I think you should get more MPG with a 2.0L under that road load and speed. In principle, with a lean-burn and proper gearing or somesuch, the upper limit for Cd=.125 A=~20sqft should be a whopping 60+ MPG at 100 MPH.

More to the point, if you get 32MPG at 31BHP at 75MPH, you should get 43MPG at 31BHP at 100MPH, all other things being equal.

But maybe I just didn't follow along.

EDIT: I would totally pay a couple $k premium to get access to a 100MPH-rural-in-good-weather-and-daytime freeway system (and I would even drive that fast once in a while), knowing it would double as an ultra-MPG commuter. I think it's a slick policy angle for aerodynamics.