The mpg figures published in sales brochures can be one of the main reasons for choosing a particular car, but those results are often misleading. Fortunately, What Car?'s True MPG tests reveal what sort of fuel economy you can expect in the real world.
To ensure accuracy and repeatability, our tests are conducted under strictly controlled laboratory conditions but based on a real route that takes in urban, A-road and motorway driving.
Below we look at the most (and least) efficient SUVs we've tested so far.
Best real MPG SUVs
10. Audi Q2 1.4 TFSI 150
Official fuel economy: 51.4mpg; True MPG: 45.3mpg; Shortfall: 11.8%
The Q2 is Audi's smallest and cheapest SUV yet, but it still has the sort of classy interior you would expect from the brand. It's great to drive, too, with composed handling and impressive refinement. And while it's safe to assume that one of the diesel versions will be more efficient than the 1.4-litre petrol we've tested, this still managed more than 45mpg.
9. Vauxhall Mokka X 1.6 CDTi 136
Official fuel economy: 65.7mpg; True MPG: 47.0mpg; Shortfall: 28.4%
Vauxhall's Mokka X is a popular choice in the UK, thanks to its chunky looks and long list of standard equipment. If you go for the 1.6-litre diesel model, you can add good fuel economy to its list of attributes. Unfortunately, the Mokka X is noisy and uncomfortable, with numb steering.
8. Mazda CX-5 2.2 Skyativ-D 150
Official fuel economy: 56.5mpg; True MPG: 47.4mpg; Shortfall: 16.1%
The new CX-5 is based on its predecessor, so is no more practical, but it looks a lot more stylish and has a much classier interior. It's also one of the most comfortable large SUVs around, soaking up poorly surfaced roads better than rivals such as the Peugeot 5008 and Skoda Kodiaq. Plus, it handles well and is very efficient for such a big car.
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