What is the difference between Audi A8's 55 and 60 TFSI engines?

I am considering purchasing an Audi A8 and I noticed that there are two engine options - 55 TFSI and 60 TFSI. What is the technical difference between the two?

The main difference between Audi A8's 55 and 60 TFSI engines is their horsepower. The 55 TFSI engine has 335 horsepower while the 60 TFSI engine has 453 horsepower. This results in a noticeable difference in acceleration and overall performance.

Apart from the horsepower difference, the 60 TFSI engine also features a hybrid system that assists in fuel efficiency. This can be beneficial for long distance driving or city commuting.