2005 Chevy Impala LS vs 2007 Dodge Charger?

The Charger is faster because it has a lighter engine and was designed to be aerodynamic. Even though the V6 is not the sport package, at least the Charger offers a V8. The Impala on the other hand does not. The V6 and the V8 Charger share the same body and the V6 has a lighter engine.