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In-depth reviews

BMW 1 Series review - MPG, CO2 and running costs

The BMW 1 Series is a remarkably frugal choice, with low CO2 emissions and good fuel economy

One of the benefits of the 1 Series’ all-new platform is its ability to accept a range of frugal engines. The light weight and a range of turbocharged three and four-cylinder engines mean emissions are low and economy is strong.

The most efficient model in the range is the 116d, whose three-cylinder diesel returns up to 62.8mpg depending on gearbox and trim, and therefore wheel size and weight. CO2 emissions are 119g/km.

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The 118d doesn’t lag too far behind, with CO2 emissions of 123g/km and economy of up to 60.1mpg. Given the minimal difference in economy over the 116d but significant increase in performance, it’s likely to be the best choice for diesel buyers. Opt for the more powerful 120d and economy drops to 57.6mpg; CO2 emissions are 129g/km.

Petrol models also fare well; the 118i returns a respectable 47.1mpg depending on spec, with CO2 emissions of 135g/km, while the hot M135i is remarkably frugal, with a maximum 36.2mpg and CO2 emissions sitting at 177g/km.

Insurance groups

The BMW 1 Series occupies insurance groups 21 to 36, with the 116d and M135i bookending this range. 

Depreciation

Our experts expect that the BMW 1 Series will hold on to around 46 to 52% of its value after three years and 36,000 miles come trade-in time. This compares well against the Mercedes A Class, whose value after the same period will range between 43 to 51%.

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Which Is Best

Cheapest

  • Name
    118i SE 5dr
  • Gearbox type
    Manual
  • Price
    £23,885

Most Economical

  • Name
    116d SE 5dr
  • Gearbox type
    Manual
  • Price
    £24,995

Fastest

  • Name
    M135i xDrive 5dr Step Auto
  • Gearbox type
    Semi-auto
  • Price
    £35,695
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