In-depth reviews

BMW 1 Series hatchback - MPG, running costs & CO2

The BMW 1 Series doesn't sacrifice performance for economy

Carbuyer Rating

4.2 out of 5

Owners Rating

5.0 out of 5

Read owner reviews
MPG, running costs & CO2 Rating

4.1 out of 5

Short of buying a hybrid, the BMW 1 Series engines are some of the most advanced and economical offered in the family hatchback class, featuring the latest turbocharging technology.

BMW 1 Series MPG & CO2

Despite the downturn in diesel sales, BMW still reckons most customers will opt for a diesel in the 1 Series, at least for a few years. Three are offered, badged 116d, 118d and 120d as we've become familiar with. Pick a 116d and you'll be getting a 1.5-litre three-cylinder that's shared with the MINI range. It's thrifty, managing up to 61.4mpg and CO2 emissions of just 120g/km with a manual gearbox and smaller alloy wheels fitted.

The 118d and 120d are bigger, using a 2.0-litre diesel fitted with 'multi-stage' turbocharging for greater efficiency. With front-wheel drive the 118d can hit 58.9mpg with CO2 emissions of 127g/km. The front-wheel drive 120d becomes available from the Sport trim, and is capable of up to 57.6mpg and emissions of 129g/km. Adding BMW’s xDrive four-wheel-drive to the 120d reduces economy to 55.4mpg and increases CO2 emissions to 135g/km.

With 138bhp, the BMW 118i is the only petrol in the regular 1 Series range so far. It can return up to 49.6mpg and emits 130g/km, making it an affordable option for company-car drivers with a mid-range BiK benefit banding. During our time with the car, however, we were only able to achieve around 34mpg on average, with a figure in the high thirties possible on longer drives.

The standalone 128ti is a front-wheel drive performance version of the 1 Series that’s capable of 0-62mph in just over six seconds. Despite the rapid pace on offer, it’s actually reasonably efficient on paper, with claimed fuel economy of 40.1mpg and CO2 emissions starting at 157g/km.

The flagship M135i xDrive is a rival to the Volkswagen Golf R and Mercedes-AMG A35, returning up to 38.7mpg while emitting 167g/km of CO2, making it by far the most expensive 1 Series to run.

Insurance groups

Insurance groups for the BMW 1 Series range from 23 in the 118d to 28 in the 120d xDrive range-topper in diesel form. Go for a petrol and the range is wider - from 21 in the 118i model to 29 in the 128ti and 36 for the stand-alone high-performance M135i model.

Warranty

Every BMW comes with a three-year, unlimited mileage warranty that also includes roadside assistance. It equals the deal offered by Mercedes and can be increased in length for an additional cost.

Servicing

Sensors in the car keep watch over the oil quality and alert you when it deems a service is required, usually between one or two years and less than 20,000 miles apart. Customers can also opt for a BMW service plan, paying a monthly sum to cover routine maintenance instead of being stung by unexpected bills.

Recommended

BMW 1 Series hatchback review
BMW 1 Series M Sport
BMW 1 Series
23 Sep 2021

BMW 1 Series hatchback review

Top 10 best luxury small cars 2021
BMW 118 M Sport
Best cars
30 Jun 2021

Top 10 best luxury small cars 2021

Most Popular

Best new car deals 2021
Fiat 500 electric
Deals
24 Sep 2021

Best new car deals 2021

Electric Citroen Ami to launch in the UK next year
2022 Citroen Ami
Citroen Ami
21 Sep 2021

Electric Citroen Ami to launch in the UK next year

Top 10 best small estates 2021
Skoda Octavia Estate
Skoda Octavia Estate
22 Sep 2021

Top 10 best small estates 2021

Tips & advice

View All
Car dashboard warning lights: the complete guide
Car dashboard symbols and meanings
Tips and advice
10 Aug 2021

Car dashboard warning lights: the complete guide

Electric car charging stations: a complete guide
Electric car charging station
Tips and advice
3 Jun 2021

Electric car charging stations: a complete guide

PCP vs HP – which type of car finance is right for you?
PCP vs HP
Tips and advice
15 Jun 2021

PCP vs HP – which type of car finance is right for you?

Average speed cameras: how do they work?
Average speed cameras: how do they work?
Tips and advice
23 Jul 2021

Average speed cameras: how do they work?

Best cars

View All
Top 10 best car interiors 2021
Peugeot 208 hatchback
Best cars
25 Jun 2021

Top 10 best car interiors 2021

Top 10 best electric cars 2021
Volkswagen ID.3
Best cars
12 Aug 2021

Top 10 best electric cars 2021

Top 10 best cheap-to-run cars 2021
Toyota Prius front 3/4 cornering
Best cars
10 Jun 2021

Top 10 best cheap-to-run cars 2021

The UK's top 10 fastest hot hatchbacks
Mercedes AMG A45 - rear
Hot hatches
25 Jun 2021

The UK's top 10 fastest hot hatchbacks