Ahh great, the "my engine has more HP per liter than yours" argument. It was stupid then, it is still stupid now. You want to compare your focus engine to a Mustang engine? Look at the whole power curve, not just the peak.
Look at the almighty S2000 engine. Makes just under 110 hp per liter (240 from 2.2L). That's awesome, right? Then why is it so sloooooooow? Oh yeah, because it only makes 162 lb-ft of torque (at 6500 RPM!) and peak horsepower occurs at 7800 RPM.
Really? Compare it to a 350Z. The Z gets 20/26 and the Mustang 18/25. Considering that the Mustang has 31% more displacement and 8% more weight, that does not seem half-bad -- so please explain how it is a "gas hog."
Oh and the little 2.2L in the Honda S2000 -- 20/25. Less than half the size of the engine in the Mustang, a curb weight of 2835 lbs, and it can only get 20/25???
Your argument is weak.
Dave