Real MPG: BMW 6 Series Convertible (2011 - 2018) 640i

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35.8–36.2
Official MPG
(NEDC)
26.5–32.0
Real MPG
28.9
Real MPG
Average
80%
of Official MPG
(NEDC)

More engines available for this model:

Engine Official MPG (NEDC) Official MPG (WLTP) Real MPG Avg. Real MPG %  
640d 49.6–50.4 mpg - 36.9 mpg 74% Submit
640d Automatic 50.4 mpg - 37.1 mpg 74% Submit
640i Automatic 35.8 mpg - 28.7 mpg 80% Submit
650i 30.7 mpg - - - Submit
650i Automatic 26.4 mpg - 20.8 mpg 79% Submit
*Based on WLTP MPG values

Read the Honest John review...

BMW 6 Series Convertible (2011 - 2018)

Incredibly smooth and refined. One of the best convertibles at minimising wind turbulance with the top down. Very well equipped as standard. Good ride quality.

Rivals

BMW 6 Series Convertible (2011 - 2018) 35.3 avg mpg
Mercedes-Benz SL (2012 - 2020) 29.6 avg mpg
Volvo C70 (2010 - 2013) 39.0 avg mpg
MINI Roadster (2012 - 2015) 40.8 avg mpg

View more rival models