GM has filed a patent application a variable displacement valvetrain system with rocker shaft porting and insert sleeves for ...

General Motors has filed a new patent that offers a look at how the company may be rethinking cylinder deactivation for its ...

Once the Audi TT RS leaves production after this model year, just two cars will come equipped with five-cylinder engines, the Audi RS3 and (not-sold-in-America) RS Q3. Figure those two will be around ...

Explore the iconic five-cylinder engine, from Audi Quattro to RS3, known for its unique sound, power, and racing heritage.