Skip advert
Advertisement

BMW 118d Convertible

We get behind the wheel of BMW's new 60mpg soft-top

Find your BMW 1 Series
Compare deals from trusted partners on this car and previous models.
Or are you looking to sell your car?
Value my car
Fast, no-nonsense car selling
Value my car

It’s difficult not to be charmed by this BMW. It’s rewarding to drive and is the best-looking 1 Series by a mile. Plus, despite supposedly playing second fiddle to the more glamorous 3 Series Convertible, it feels nearly as special – and is far cheaper. However, compared to its rivals, it’s not particularly good value, even if this 118d promises low running costs.

Advertisement - Article continues below

Could the best variant of BMW’s facelifted 1 Series Convertible be this unassuming diesel? Of course, we’d all rather have the high-powered 135i – but in the real world of escalating fuel prices, the stylish 118d M Sport, which is capable of returning around 60mpg, is very appealing indeed.

An open-topped version of the all-new 1 Series – likely to be badged the 2 Series – will come in 2013. But for now, buyers have to be content with the modest visual updates that were rolled out this year. These include a more aerodynamic front bumper and tweaked headlamps, which now feature LED running lights.

With the roof down, the compact cabrio draws both admiring and envious glances, while the cabin feels reassuringly premium. We would recommend forking out for leather trim, and steering clear of the body-coloured plastic inserts.

Skip advert
Advertisement
Skip advert
Advertisement - Article continues below

Used - available now

1 Series

2024 BMW

1 Series

32,802 milesAutomaticPetrol1.5L

Cash £17,539
View 1 Series
1 Series

2015 BMW

1 Series

79,285 milesAutomaticDiesel2.0L

Cash £8,990
View 1 Series
1 Series

2019 BMW

1 Series

77,808 milesAutomaticPetrol2.0L

Cash £12,995
View 1 Series
1 Series

2024 BMW

1 Series

40,558 milesManualPetrol1.5L

Cash £14,070
View 1 Series

So, what makes the 118d so compelling? It’s not one single aspect, but the car as a whole. On top of its excellent efficiency, it emits only 129g/km of CO2. Power output is rated at a modest 143bhp, yet the 300Nm of torque is evident at normal speeds, so the BMW feels effortlessly fast. Ignore the 0-62mph sprint time; it’s the in-gear punch that makes the difference on the move – and the 118d has plenty.

Many convertible buyers may still baulk at the idea of an oil-burner, despite the economic advantages. And yes, without a roof to shield your ears from the engine, there is a tell-tale clatter on start-up. 

However, at a halt in traffic the standard stop-start ensures serene silence. On the move, BMW has managed to quell the 2.0-litre turbodiesel’s noise brilliantly, and when you are driving quickly the newcomer rarely sounds like a diesel.

Fortunately, fast motoring is something this car encourages. While the steering is a little heavy at slow speeds, it’s direct, while turning into and then powering out of bends is very satisfying. All the driving controls are beautifully weighted, and the 1 Series flows from corner to corner. There’s not quite enough grunt on offer to unstick the rear tyres in the dry, but it’s still a rewarding car from behind the wheel.

You pay for that privilege, as the Convertible is not cheap. The similarly powerful Audi A3 2.0 TDI Sport Cabriolet is around £2,000 less, for instance. It’s not half as much fun to drive, though.

Skip advert
Advertisement

New & used car deals

BMW 1 Series

BMW 1 Series

RRP £39,025Used from £4,999
Mercedes A Class
BMW 2 Series

BMW 2 Series

RRP £36,320Used from £20,990
Audi A3

Audi A3

RRP £26,310Avg. savings £2,554 off RRP*Used from £11,010
* Average savings are calculated daily based on the best dealer prices on Auto Express vs manufacturer RRP
Skip advert
Advertisement

Most Popular

Fancy a cheap used EV? The data says you'd better be quick
Opinion - cheap used EVs

Fancy a cheap used EV? The data says you'd better be quick

A used EV has never had more appeal as the cost of petrol and diesel heads for £2 per litre, says our news editor. But prices are rising, so you’ll ne…
Opinion
24 Sep 2026
New BMW iX3 40 M Sport 2026 review: entry-level SUV isn't a compromise
New BMW iX3 40 M Sport - front tracking

New BMW iX3 40 M Sport 2026 review: entry-level SUV isn't a compromise

Practical, efficient and much cheaper than the xDrive50, we think the base-level BMW iX3 40 is the pick-of-the-range.
Road tests
24 Sep 2026
New Bentley Torcal revealed: brand's first EV is its most powerful car ever
Bentley Torcal - front action

New Bentley Torcal revealed: brand's first EV is its most powerful car ever

Meet the Torcal SUV, the first all-electric Bentley, claimed to ride like a limo and corner like a coupe
News
24 Sep 2026