X 2012 Porsche 911 GTS

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

MSRP: $103,100

EPA Fuel Economy

Combined: 21 MPG

City: 18 MPG

Highway: 25 MPG

X 2011 Rolls-Royce Phantom

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

MSRP: $380,000

EPA Fuel Economy

Combined: 14 MPG

City: 11 MPG

Highway: 18 MPG