What does the Audi A4's 'ultra' designation mean?

I've been researching the Audi A4 and noticed that some models have a 'ultra' designation. What does this mean and how does it affect the car's performance and fuel efficiency?

The 'ultra' designation in Audi A4 models refers to a specific type of engine that prioritizes fuel efficiency over power. This means you can expect better gas mileage while sacrificing some performance capabilities.

When you see 'ultra' on an Audi A4, it means that the car has a smaller engine size and lower horsepower, which ultimately results in improved fuel economy. However, keep in mind that this may affect the car's acceleration and overall driving experience.