What size engine does the Audi A6 come with?

I'm considering purchasing an Audi A6, but I want to know what size engine it comes with to ensure it has enough power for my needs.

The Audi A6 currently comes standard with a 2.0-liter turbocharged four-cylinder engine, providing 248 horsepower and 273 lb-ft of torque.

For drivers looking for a little more power, the Audi A6 is also available with a 3.0-liter turbocharged V6 engine, producing 335 horsepower and 369 lb-ft of torque.