The top speed of a 2013 Chevrolet Impala LTZ isn't officially published by Chevrolet. Manufacturers typically don't specify top speed, as it's dependent on various factors (road conditions, tire condition, etc.) and isn't a primary performance metric they emphasize.
While you might find some anecdotal information online claiming a specific top speed, it's unreliable and likely varies between individual vehicles. Expect it to be governed well below what the engine *could* theoretically reach.
