Introduced in 2007 ahead of the 2008 model year, the S5 is a sportier version of the Audi A5. As such, it offers a more powerful engine, along with a sport-tuned suspension that gives the chassis a ...

Both Audi and BMW have long, storied histories of making powerful six-cylinder engines. However, one of BMW's best was also one that flies a little bit under the radar, particularly in the U.S. — the ...