What is the reason for the Audi 80's poor fuel economy?

I recently bought an old Audi 80 and noticed that it has a high fuel consumption rate compared to newer cars. Can you explain why this may be the case?

The Audi 80 was first introduced in 1972 and may not have been designed with fuel efficiency as a top priority. It may also have older, less efficient engine technology compared to newer cars. To improve fuel economy, make sure your tires are properly inflated and consider getting regular tune-ups.

Fuel economy can be affected by various factors such as driving habits, road conditions, and vehicle maintenance. Make sure to avoid excessive acceleration and maintain a consistent speed while driving.