Real MPG: BMW 4 Series Convertible (2014 - 2020)

Number of RealMPGs submitted

19–56

Real MPG

37.1

Average

Folding metal roof boosts security and refinement, high-quality interior is packed with technology, softer suspension means a smoother ride than the 4 Series Coupe.

Folding roof robs space from back seats and boot, impressive automatic gearbox isn’t standard on all cars, Apple CarPlay costs extra, and there’s no Android Auto support.

Read the full BMW 4 Series Convertible review

Select engine for more Real MPG information:

Engine	Official MPG (NEDC)	Official MPG (WLTP)	Real MPG Avg.	Real MPG %
420d	53.3–58.9 mpg	-	47.0 mpg	84%	Submit
420d Automatic	50.4–64.2 mpg	-	46.3 mpg	81%	Submit
420i	41.5–45.6 mpg	-	29.8 mpg	68%	Submit
420i Automatic	38.7–48.7 mpg	-	33.1 mpg	76%	Submit
425d	46.3–54.3 mpg	-	-	-	Submit
425d Automatic	44.1–56.5 mpg	-	-	-	Submit
425i	37.7 mpg	-	-	-	Submit
425i Automatic	35.8 mpg	-	-	-	Submit
428i	40.4–41.5 mpg	-	34.0 mpg	83%	Submit
428i Automatic	42.2–42.8 mpg	-	32.7 mpg	77%	Submit
430d	46.3 mpg	-	43.3 mpg	94%	Submit
430d Automatic	44.1–51.4 mpg	-	40.5 mpg	85%	Submit
430i	36.2–40.4 mpg	-	32.4 mpg	85%	Submit
430i Automatic	34.4–44.8 mpg	-	33.2 mpg	84%	Submit
435d Automatic	47.9 mpg	-	40.0 mpg	83%	Submit
435d xDrive Automatic	44.1–49.6 mpg	-	40.3 mpg	86%	Submit
435i	32.1–34.9 mpg	-	23.0 mpg	69%	Submit
435i Automatic	32.1–37.7 mpg	-	31.4 mpg	90%	Submit
440i Automatic	36.2–39.2 mpg	-	32.6 mpg	87%	Submit

*Based on WLTP MPG values

Read the Honest John review...

BMW 4 Series Convertible (2014 - 2020)

Folding metal roof boosts security and refinement, high-quality interior is packed with technology, softer suspension means a smoother ride than the 4 Series Coupe.

Rivals

BMW 4 Series Convertible (2014 - 2020)	37.1	avg mpg
Ford Mustang (2015 - 2022)	25.1	avg mpg
Audi A3 Cabriolet (2014 - 2020)	43.7	avg mpg
Audi TT Roadster (2015 - 2023)	35.4	avg mpg