Watch a fierce Mercedes-AMG battle between two performance sedans: the C63S fitted with a SuperSprint exhaust system and the powerful AMG GT 63 S 4Matic+ 4-Door Coupé. This video captures rev battles, ...

Carmakers are now stuffing big batteries into their loudest and proudest performance flagships—the cars in their lineup that typically have the highest emissions—and it has created a crop of cars that ...