What is a good car that satisfies this description?

Big car and AWD means you're not going to get 25mpg average without a struggle, but your choice of a Ralliart (as long as you keep a light right foot) is reasonable. Find a car you like the look of, at the right price, then look up it's official economy and minus 10% for real world accuracy. So, if the car you like the look of claims to run 30mpg, chances are you'll not get more than 27mpg in the real world!