2017 Audi A4 Ultra: 31-mpg version of luxury sedan

Audi offers efficiency-focused “Ultra” versions of several of its models in Europe that are designed to achieve maximum fuel economy with conventional internal-combustion powertrains. So far, none of these models have been offered for sale in the U.S., though. That’s about to change with the introduction of the 2017 Audi A4 Ultra sedan, which… …read more