True MPG: how close to reality are official fuel economy figures?
What Car?'s True MPG test reveals official fuel economy figures are closer to reality than ever… but still an average of 4.9% worse than claimed...
Citroën C4 Cactus Puretech 110
Engine 3cyl, turbo, petrol Gearbox Manual
Official economy 49.8mpg True MPG 44.2mpg Difference -11.2%
Read our Citroën C4 Cactus review or see what discounts are available
BMW 3 Series 320d
Engine 4cyl, diesel Gearbox Automatic
Official economy 54.3mpg True MPG 47.2mpg Difference -13.1%
Read our BMW 3 Series review or see what discounts are available
BMX X2 xDrive20d
Engine 4cyl, diesel Gearbox Automatic
Official economy 48.7mpg True MPG 39.6mpg Difference -18.7%
Read our BMW X2 review or see what discounts are available
Ford Fiesta 1.0 Ecoboost 140
Engine 3cyl, turbo, petrol Gearbox Manual
Official economy 48.7mpg True MPG 38.3mpg Difference -21.4%
Read our Ford Fiesta review or see what discounts are available
Volvo V60 D4
Engine 4cyl, diesel Gearbox Automatic
Official economy 48.7mpg True MPG 38.3mpg Difference -21.4%
Read our Volvo V60 review or see what discounts are available
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