ahmadbila:
You'll be surprised to know that the Corolla(present shape) has better aerodynamics than the previous Civic, dont know about the new one though.
'06 Civic Coefficient of drag=0.32
'06 Corolla Coefficient of drag=0.30
Thats why I always say that looks can be deceiving there's alot of engineering involved and you cannot judge aerodynamics by just looking at the car.