Question: what is the best fuel economy luxury car?
Answer: Mercedes-Benz E-Class E220d. ...  Volkswagen Passat 2.0 TDI 150. ...  Alfa Romeo Giulia 2.2D 180. ...  BMW 3 Series 320d. ...  Mazda 6 2.2 Skyactiv-D. ...  Skoda Superb 1.6 TDI 120. ...  Audi A4 2.0 TDI 190. ...  Vauxhall Insignia Grand Sport 1.6 CDTi 110.