The 2017 BMW 320 is available as a 4-door, 5-seat sedan. Starting at $33,450, the 2017 BMW 320 RWD is powered by a 2.0L , 4 -cylinder engine mated to an automatic transmission that returns an EPA estimated 23-mpg in the city and 35-mpg on the highway. The top of the line 2017BMW320w/South Africa AWD , priced at $ 35,450 , is powered by a 2.0L , 4 - cylinder engine mated to an automatic transmission that returns an EPA estimated 23-mpg in the city and 34-mpg on the highway.