The all-new BMW 4 Series has been spied testing for the very first time. While it looks to inherit many of its styling cues from the forthcoming 3 Series, these pictures show it will switch the current car’s metal hard-top for a folding fabric roof in an attempt to lower weight. 

This follows in the footsteps of the recently revealed BMW Z4 roadster, which will also switch to a textile roof this time around. It’ll help lower emissions and improve fuel economy, while also limiting the amount of space it requires when folded into the boot.

Best convertible cars on sale

BMW’s all-new 3 Series saloon (codenamed G20) will be revealed at the Paris Motor Show next week. The 4 Series Coupe and Convertible aren’t due until 2019, but these images show the two-door models will share their sleek looks with the saloon. That means the same sharp, swept-back headlights, long bonnet and sculpted bumpers, alongside similarly sculpted flanks, a flat rear-end, and slim LED tail-lamps.

The interior will be carried over with few changes, too. As such, the 4 Series will most likely use BMW’s latest 10.2-inch digital dials, alongside a widescreen infotainment iDrive system pre-loaded with sat-nav, real-time traffic info and Apple CarPlay connectivity. 

Under the bonnet, the 4 Series Convertible is expected to carry over only the more powerful 3 Series engines. The entry-level units will likely be badged 420i and 420d, using tweaked versions of the current car’s four-cylinder petrol and diesel units. Above this will sit the 430i, as well as the six-cylinder 430d and 440i.

It’s unlikely the lesser three-cylinder 3 Series engines will feature in the sportier Convertible, however. At this time, it’s unclear whether the 4 Series will adopt the 3’s forthcoming plug-in hybrid and full-EV powertrains, though a flagship M4 is a given.

We’ll learn more about the forthcoming BMW 4 Series Coupe and Convertible in the coming months, shortly after the 3 Series debuts at Paris. Expect the drop-top version to go on sale next summer, priced from around £40,000.

Click here for all the latest on the new BMW 3 Series


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