X 1994 Porsche 928 GTS

5.4 L, 8 cyl, Man 5-spd, Regular Gasoline

EPA Fuel Economy

Combined: 13 MPG

City: 11 MPG

Highway: 17 MPG

X 2009 Audi A6 Avant quattro

3.0 L, 6 cyl, Auto (S6), Premium Gasoline

EPA Fuel Economy

Combined: 21 MPG

City: 18 MPG

Highway: 26 MPG