what is the difference between chevy impala lt and ltz?
The standard engine in the 2015 Impala is a 196 horsepower 2.5-liter 4-cylinder engine. The great thing about the LT/LTZ trims is they offer the aforementioned start/stop engine. ... The LT/LTZ trims also come with a 305 horsepower 3.6-liter V6 engine, paired with a 6-speed automatic transmission.