The sports car has a better drag coefficient and less surface area, that is why at the same speed it needs less power. The “aerodynamics” are factored in only in those coefficients. But the velocity is the dominating part, as it is cubed in that equation.
But still, I am not comparing a sports car to a station wagon. I compare a sports car to itself at higher velocities. And contrary to popular belief, higher speeds result in an unproportional excess in fuel consumption.
It is, see e.g. here
The sports car has a better drag coefficient and less surface area, that is why at the same speed it needs less power. The “aerodynamics” are factored in only in those coefficients. But the velocity is the dominating part, as it is cubed in that equation.
But still, I am not comparing a sports car to a station wagon. I compare a sports car to itself at higher velocities. And contrary to popular belief, higher speeds result in an unproportional excess in fuel consumption.