What is the difference between an Audi A6 and A7 engine?

I'm trying to decide between the Audi A6 and A7, but I'm not sure what the main difference is in terms of their engines. Can you provide some information on this?

The main difference between the Audi A6 and A7 engines is their power output. The A7 has a more powerful engine, specifically the 55 TFSI model with a 3.0-liter V6 engine compared to the A6's 45 TFSI model with a 2.0-liter four-cylinder engine. This translates to a higher horsepower and torque in the A7.

Another important difference is the A7's engine is paired with a 7-speed automatic transmission while the A6 has an 8-speed automatic transmission. This affects the overall performance and fuel efficiency of the vehicles.