We’ve been hearing for a while that Audi would soon populate its U.S. model range with optional diesel engines, but to date only the Audi A3 TDI and the Audi Q7 TDI come with oil-burning engines.

While the A4 will still be available with a diesel engine, most of the line-up will use an updated version of the VW Group's EA888 2.0-liter turbocharged gasoline engine, electrified by various ...