Why do some Audi A8 models have better fuel efficiency than others?

I've noticed that some Audi A8 models have better fuel efficiency ratings than others. What factors contribute to this and how can I determine which model will be more fuel efficient?

The fuel efficiency of an Audi A8 can vary depending on the engine type and size. Smaller engines tend to be more fuel efficient compared to larger ones. Additionally, factors such as driving habits and terrain can also impact fuel efficiency.

You can determine the fuel efficiency of different Audi A8 models by checking their EPA fuel economy ratings. These ratings provide an estimate of how many miles per gallon each model can achieve in city and highway driving conditions.

In general, diesel engines are known for their higher fuel efficiency compared to gasoline engines. If fuel efficiency is a priority for you, you may want to consider an Audi A8 TDI model, which uses a diesel engine.