Why does the Audi A5 have a higher drag coefficient than the A4?

I noticed that the Audi A5 has a drag coefficient of 0.29, while the A4 has a lower drag coefficient of 0.27. Can you explain why this is and how it affects the car's performance?

The shape and design of a car's body can greatly impact its drag coefficient. The Audi A5 has a sleeker and more aerodynamic design compared to the A4, resulting in a higher drag coefficient. This can potentially affect the car's top speed and fuel efficiency.