What is the difference between the Audi A6 45 TFSI and the 55 TFSI?

I am looking to buy an Audi A6, but I am unsure of the difference between the two TFSI options. Can someone explain the technical differences and how it impacts the performance of the car?

The main difference between the Audi A6 45 TFSI and the 55 TFSI is the engine size and power output. The 45 TFSI has a 2.0-liter engine with 248 horsepower, while the 55 TFSI has a 3.0-liter engine with 335 horsepower. This means that the 55 TFSI will have a faster acceleration and higher top speed compared to the 45 TFSI.