What are common engine types used in the Audi A6?

I am looking to buy an Audi A6 and I'm not sure what type of engine would be best for me. Can someone who is knowledgeable about cars tell me the different engine types that are typically used in the Audi A6 and their pros and cons?

The most common engine types used in Audi A6 are gasoline and diesel engines. Gasoline engines usually have better acceleration and are more enjoyable to drive, while diesel engines offer better fuel efficiency and higher torque performance. However, diesel engines are more expensive upfront and may be more expensive to maintain in the long run.