The 2001 BMW Z3 is available as a 2-door, 2-seat convertible. Starting at $31,300, the 2001 BMW Z3 2.5i Roadster is powered by a 2.5L , 6 -cylinder engine mated to a manual transmission that returns an EPA estimated 20-mpg in the city and 27-mpg on the highway. The top of the line 2001BMWZ3Coupe , priced at $ 37,700 , is powered by a 3.0L , 6 - cylinder engine mated to a manual transmission that returns an EPA estimated 21-mpg in the city and 28-mpg on the highway.