Which is better for fuel efficiency: Audi's diesel engines or hybrid engines?

I am looking to purchase a new Audi, but I am unsure if I should opt for a diesel engine or a hybrid engine. Which one would give me better fuel efficiency?

According to car experts, if you drive mostly in the city, a hybrid engine would be better for fuel efficiency. But if you do a lot of highway driving, a diesel engine would be more efficient.

In my experience, a hybrid engine may have slightly higher fuel efficiency initially, but diesel engines tend to maintain their efficiency better over time. So in the long run, a diesel engine may be the better choice.

It ultimately depends on your driving habits and the type of driving you do. Do you constantly have stop-and-go traffic or do you often have long stretches of highway driving? Consider these factors to make your decision.