A car that gets 41/55 MPG sounds pretty great, right? You could have been doing this back in 1983. That's right, Honda's 1983 Civic got 41 MPG im the city and 55 on the highway, and other variants and years of the Civic also had good gas mileage. See this chart of all of the years.
How is it that the 2007 Civic hybrid doesn't really beat these figures with its 49/51 mileage? I suppose that it could be changes in the areas of emissions and safety that add weight, complexity, mileage-sucking mechanics.