BMW has responded to powerful new rivals with updates for the M5 and M6 - including a racy new 575hp Competition Package option
10. Mercedes-Benz SL65 AMG: 18.7mpg
Despite a combined fuel consumption nearly 30% better than our worst performer, the sportiest incarnation of Merc's utterly stylish SL remains a rather thirsty beast.
A brilliantly smooth engine, clever metal folding tin top and precise handling goes at least some way to compensating for the sting it inflicts at the forecourt.
related stories on msn
Latest Cars videos
A significant horsepower boost and some restyling brings the Aston Rapide on leaps and bounds
Date 21/05/13, Duration 2:30, Views 694