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...

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What Car? team
15 March 2019

Volkswagen Polo

Volkswagen Polo 1.0 TSI 95

Engine 3cyl, turbo, petrol Gearbox Manual

Official economy 51.9mpg True MPG 51.8mpg Difference -0.2%

Read our Volkswagen Polo review or see what discounts are available


Audi Q3 35 TFSI DSG

2019 Audi Q3 cornering

Engine 4cyl, turbo, petrol Gearbox Automatic

Official economy 38.2mpg True MPG 38.0mpg Difference -0.5%

Read our Audi Q3 review or see what discounts are available


Citroën Berlingo Puretech 110

Citroën Berlingo front

Engine 3cyl, turbo, petrol Gearbox Manual

Official economy 42.4mpg True MPG 41.1mpg Difference -3.1%

Read our Citroën Berlingo review or see what discounts are available


Mini Convertible Cooper

New Mini Convertible vs Mazda MX-5 RF

Engine 3cyl, turbo, petrol Gearbox Manual

Official economy 45.6mpg True MPG 43.4mpg Difference -4.8%

Read our Mini Convertible review or see what discounts are available


Ford Focus 1.0 Ecoboost 125

Ford Focus front

Engine 3cyl, turbo, petrol Gearbox Manual