According to Which?, plug-in hybrids are not as fuel-efficient as official figures claim

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Manufacturer mpg (minimum claimed)

Which? tested fuel mpg

0mpg

50

100

150

200

250

BMW X5 Plug-in Hybrid (2020-) 72% difference

Mercedes-Benz B-Class Plug-in hybrid (2020-) 67%

Hyundai Ioniq plug-in hybrid (2017-) 65%

Mitsubishi Outlander PHEV (2014-) 62%

Volkswagen Passat GTE Estate (2015-) 62%

Average of 22 cars tested 61%