BMW has responded to powerful new rivals with updates for the M5 and M6 - including a racy new 575hp Competition Package option
MINI Convertible 1.6D 112 Cooper D: 105g/km
Combined economy: 70.6mpg
A genuine open-top cabrio, the MINI comes third, but it's the top choice for sunseekers after performance, too. The 1.6 diesel is sprightly and helps drivers really enjoy the sporty Cooper chassis.
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