An S4 heart sound is a low-pitched sound that occurs toward the end of the diastole. In some cases, an underlying health condition, often one affecting the left ventricle, may cause the S4 heart sound ...

Say goodbye to the gasoline-powered S4. This is likely its final model year, as next year the A4 lineup it springs from is expected to become all-electric. Audi sends off the gas model properly with ...

This iteration of the Audi S4 sedan arrived in 2017, powered by a 349-hp, 369-lb-ft direct-injected turbocharged 3.0-liter V-6 with an eight-speed automatic and standard all-wheel drive. It received a ...