X 2003 Ford Crown Victoria CNG

4.6 L, 8 cyl, Auto 4-spd, Natural Gas

EPA Fuel Economy

Combined: 14 MPG

City: 12 MPG

Highway: 17 MPG

X 2009 Jaguar XKR

4.2 L, 8 cyl, Auto 6-spd, Premium Gasoline

EPA Fuel Economy

Combined: 18 MPG

City: 15 MPG

Highway: 23 MPG