Why does the Audi A4 have a direct-injection engine?

I'm considering buying an Audi A4 and noticed that it has a direct-injection engine. Can you explain why Audi chose to use this type of engine and what benefits it offers?

The direct-injection engine in the Audi A4 allows for more precise fuel delivery, resulting in increased fuel efficiency and performance. It also reduces emissions, making it more environmentally friendly.

Audi chose to use direct-injection technology in the A4 because it allows for a leaner fuel air mixture, resulting in more power and better fuel economy. It also allows for better control of combustion, reducing combustion knock and improving engine responsiveness.