The 2020 Chevrolet Impala is available as a 4-door, 5-seat sedan. Starting at $31,620, the 2020 Chevrolet Impala LT is powered by a 3.6L, 6-cylinder engine mated to an automatic transmission that returns an EPA estimated 19-mpg in the city and 28-mpg on the highway. The top of the line 2020 Chevrolet Impala Premier, priced at $36,720, is powered by a 3.6L, 6-cylinder engine mated to an automatic transmission that returns an EPA estimated 19-mpg in the city and 28-mpg on the highway.