How does the Audi A4 engine achieve high horsepower while maintaining fuel efficiency?

I am looking to purchase a new car and have heard great things about the Audi A4. However, I am confused about how the engine is able to provide such high horsepower while also being fuel efficient. Can you please explain the technology behind this?

The Audi A4 uses a turbocharged engine that combines direct injection and variable valve timing to optimize performance and fuel efficiency. I would recommend test driving one to experience it for yourself.

The A4 also has a start-stop system, which shuts off the engine when the car is at a stop to save fuel. This, combined with the efficient engine technology, helps achieve high horsepower while still being fuel efficient. I suggest reading reviews and comparing stats to get a better understanding.