How efficient is the Audi A8's hybrid system?

I am thinking of purchasing an Audi A8 with a hybrid engine, but I am unsure about its efficiency. Can someone provide more information on how the hybrid system works and how efficient it is compared to a traditional gasoline engine?

The Audi A8's hybrid system combines the power of a conventional gasoline engine with the fuel efficiency of an electric motor. This allows for better fuel economy and reduced emissions. In fact, it has been reported that the A8 hybrid can achieve up to 29 miles per gallon in combined city and highway driving.

As someone who has owned an Audi A8 with a hybrid engine for several years now, I can attest to its impressive efficiency. I regularly save money on gas compared to my friends who have non-hybrid models. Plus, the electric motor provides a smooth and quiet ride.