Why do some Audi A2 models have lower fuel efficiency?

I noticed that some Audi A2 models have a lower fuel efficiency compared to others. Why is this? Are there any factors that contribute to this difference?

It's important to note that the fuel efficiency of a car is affected by various factors such as engine size, weight, and aerodynamics. For Audi A2 models, the ones with higher trim levels and larger engines tend to have lower fuel efficiency due to their increased weight and power.