To find the horsepower of a 2011 Audi A6 engine, I recommend checking these resources:
* Audi's Official Website: Look for the 2011 A6 model year and its different trim levels. The horsepower information should be listed in the specifications section.
* Edmunds, Kelley Blue Book (KBB), or AutoTrader: These automotive websites provide detailed information about car models, including engine horsepower.
* Your Local Audi Dealership: Contact your local Audi dealership for the most accurate and up-to-date information about the 2011 A6.
Please keep in mind that the horsepower of a 2011 Audi A6 can vary depending on the specific engine option available in that model year.