Why does the 2021 Audi A6 have better fuel efficiency than its predecessor?

I'm interested in purchasing the 2021 Audi A6 and I've noticed that it has a higher MPG rating than the previous model. What improvements have been made to achieve this and how does it compare to other vehicles in its class?

The 2021 Audi A6 has undergone significant changes and improvements in its engine performance and aerodynamics. As a result, the fuel efficiency has been increased by 10%, making it one of the most fuel-efficient luxury sedans on the market.

One of the main improvements made to achieve better fuel efficiency in the 2021 Audi A6 is the addition of a mild hybrid system. This system uses a small battery and an electric motor to assist the engine and reduce fuel consumption.