The Audi A8 is a full-size luxury sedan with an aluminum chassis, now in its fourth generation of production. The 2013 Audi A8 features the maker's proprietary Quattro AWD system, and is offered in ...

Audi has chosen the 64th Frankfurt Motor Show to present two new versions of its A8 large luxury sedan as well as the brand-new 4.0 TFSI engine which will power the “S”-badged versions of its line-up.

When Audi announced the 2013 A8 with the 3.0T V6, it didn’t mention fuel economy numbers but did tout the 333-horsepower engine’s “great efficiency.” According to the United States Environmental ...