Audi has announced that its new S4 saloon and Avant estate will be powered by a diesel engine for first time. BMW 3 Series vs. Mercedes-Benz C-Class: which is the best executive saloon?

Like its larger S6 TDI and S7 TDI counterparts, the Audi S4 has adopted a diesel engine – at least in the European market. Strange move? Perhaps, but with diesel still a popular choice in this ...

so the global SQ5's diesel engine was replaced by a gasoline-powered V6 borrowed from the Audi S4/S5. To show that little, if anything, was lost in translation from diesel to gas, we headed to ...

A 2.0-liter TDI Clean Diesel is now offered on the United States spec version ... The seven-passenger interior of the Q7 has also been reworked for 2010 for greater comfort. A new Audi S4 arrives for ...

To keep it fresh Audi decided to go further than the ... S-tronic dual-clutch transmission, while the V6 diesel models, including the S4 TDI, use an eight-speed ZF torque-converter automatic ...