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In-depth reviews

Mazda MX-5 review - MPG, CO2 and running costs

Mazda doesn’t use turbos to boost efficiency, but still claims impressive economy figures for the MX-5

Mazda claims it prefers not to focus on achieving spectacular results in the official EU economy cycle; instead, it says it’s more interested in giving customers real-world fuel savings.

That’s why its strategy is based around high-compression naturally aspirated petrol engines rather than following the turbocharged, downsizing trend. Both the engines offered in the MX-5 use direct injection technology, but the smaller 1.5-litre SkyActiv unit delivers better economy – it returns 44.8mpg with CO2 emissions of 142g/km.

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The 2.0-litre comes with Mazda’s i-stop and E-Loop fuel-saving technology, giving the engine figures of 40.9mpg and 155g/km.

Despite its exotic shape, the MX-5 should be no more expensive to run than, say, a Mazda 3 hatchback – both use a variety of common components, so replacement parts should be easy to track down and relatively affordable.

If you’re planning to wait for a more powerful turbocharged MX-5 or a more efficient diesel version, don’t hold your breath – Mazda’s engineers have ruled out both, in the near future at least.

Insurance groups

Insurance groups correspond with the two engine sizes on offer and start at group 27 for the 1.5-litre, climbing to group 33 for top-spec cars. Limited edition cars run slightly higher, with the recent 30th Anniversary model occupying group 34. 

Depreciation

Despite our changeable weather, the UK is one of the largest markets for convertibles in Europe – so it follows that the MX-5 should hold its value well. Experts predict the two-seater roadster should retain around 47% of its original value over 3 years and 36,000 miles.

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Which Is Best

Cheapest

  • Name
    1.5 [132] SE+ 2dr
  • Gearbox type
    Manual
  • Price
    £19,230

Most Economical

  • Name
    1.5 [132] SE+ 2dr
  • Gearbox type
    Manual
  • Price
    £19,230

Fastest

  • Name
    2.0 [184] SE-L Nav+ 2dr
  • Gearbox type
    Manual
  • Price
    £22,210
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