How does the Audi A1 engine differ from other Audi models?

I've been considering purchasing an Audi A1 and doing some research on the engine. I'm curious to know how it performs compared to other Audi models in terms of horsepower, fuel efficiency, and overall performance.

The Audi A1 offers a smaller engine compared to other Audi models, but it still packs a punch with its turbocharged 1.4-liter 4-cylinder engine. While it may not have the same horsepower as larger engines, it excels in fuel efficiency without sacrificing performance.