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True MPG: best and worst cars revealed

What Car?'s laboratory tests use real-world driving routes to show what fuel economy you can really expect from your car. So, what are the best and worst performers?

Words BySteve Huntingford

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1. Suzuki Ignis 1.2 SVHS

Official fuel economy: 65.7mpg; True MPG 59.6; Shortfall: 9.3%

Another Suzuki, the Ignis, is the most efficient car we've yet tested. There's plenty to like about this miniature off-roader, including its low price and generous standard equipment. The 1.2 SVHS model has a small electric motor which helps the engine, allowing you to use less revs and consequently less fuel, particularly around town.

Read our full Suzuki Ignis review

Find a great Suzuki Ignis deal


The least fuel-efficient car tested:

Audi SQ5

Official fuel economy: 33.2mpg; True MPG: 24.6

This sporty version of the Audi Q5 is properly fast and handles well, but its turbocharged 3.0-litre V6 petrol engine is so thirsty that you'll spend almost as much time at the pumps as you will enjoying its heady performance.

Read our full Audi SQ5 review

Find a great Audi SQ5 deal


Read more – how we test our True MPG cars

Read more – find out your car's True MPG


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