BMW 1 Series Convertible 123d M Sport 2dr

For The 123d’s twin-turbo engine gives stunning performance, yet running costs are low. Standard kit is generous and includes rear parking sensors and climate control.

Against This is an expensive 1 Series and it doesn't quite have the image or class to live up to its price tag. The ride is firm (unless you specify the regular suspension) and space for rear seat passengers is tight.

What Car? says

3 out of 5 stars

This version of the 1 Series Coupe is quick yet frugal, well equipped and has handling to match its sporty looks. The price is too high, however; cheaper versions make much more sense.

Reader review rating

4.4

Key facts

0–60mph: 7.5 secs
Top speed: 143 mph
Average mpg: 53.3
Tank range: 618 miles

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The BMW 1 Series Convertible full review Read in full

Performance
3 out of 5 stars
Most engines are strong and smooth
Ride & Handling
4 out of 5 stars
Better than many of its rivals
Refinement
4 out of 5 stars
Quiet, but some engines let it down
Buying & Owning
4 out of 5 stars
Not cheap, but will hold its value
Quality & Reliability
3 out of 5 stars
It all feels solid and well engineered
Safety & Security
4 out of 5 stars
Even base models are safe
Behind The Wheel
3 out of 5 stars
Comfy, appealing environment
Space & Practicality
2 out of 5 stars
Fine in front, cramped in the back
Equipment
3 out of 5 stars
All models come with decent kit

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Buyer's notes

Target Price team says:

The 1 Series has a range of engines to suit every budget and taste. For us, the 120d supplies the best balance between pace and running costs and it's refined too. The smaller petrol engines are rather short on grunt, while the higher powered petrol and diesel models push the price too high.

Entry-level ES trim supplies all the basics, but stepping up to SE adds the kind of luxuries that many premium badge buyers will expect. M Sport adds a fetching bodykit, but it also has firmer suspension settings that make the ride less forgiving.

Running costs for the diesel models are low, thanks partly to BMW’s clever Efficient Dynamics measures, which helps towards stunning fuel economy and CO2 emissions.

Petrol versions are cleaner and more frugal than many rivals, but by any standards the 135i seems unnecessarily pricey. BMW offers three- or five-year fixed price servicing packages that can be sold on to future owners.