X 2008 Bentley Continental GTC

6.0 L, 12 cyl, Auto (S6), Premium Gasoline

EPA Fuel Economy

Combined: 12 MPG

City: 10 MPG

Highway: 17 MPG

X 2004 Porsche Boxster S

3.2 L, 6 cyl, Man 6-spd, Premium Gasoline

EPA Fuel Economy

Combined: 19 MPG

City: 16 MPG

Highway: 24 MPG