It's the next best thing to an M4 GTS.

The BMW M4 CS was spotted about two months ago without any camouflage; now it’s finally ready to show off its goods in full. As expected, the new version slots between the M4 with the Competition Package and the hardcore track-focused M4 GTS. Since the latter is no longer available, it effectively makes the CS the new range topper in the 4 Series family. BMW points out the 'CS' suffix is here to stay and it will be used from now on to signal a beefier version positioned above the models equipped with the aforementioned Competition Package.

The CS suffix is here to stay and it will be used for more hardcore M models

One of the most significant upgrades is found in the engine bay where the 3.0-litre engine has been massaged to deliver an extra 10 horsepower and impressive-sounding 37 pound-feet of torque compared to the M4 fitted with the Competition Package. That means the biturbo straight-six motor now generates 460 hp and 442 lb-ft and allows the M4 CS run to 62 mph in only 3.9 seconds (down by a tenth of a second) en route to an electronically capped 174 mph.

2018 BMW M4 CS
2018 BMW M4 CS

The engine works exclusively with a seven-speed, double clutch automatic transmission, so purists will be disappointed to hear the M4 CS won’t be sold with a manual gearbox. That might not be much of an issue considering BMW says the DCT "changes gears in a fraction of a second” and has a long seventh gear to lower fuel consumption when you’re driving the coupe on the highway.

Aside from the power boost, the new M4 CS has gone through a series of weight-saving measures shaving off 32 kilograms compared to the regular DCT-equipped car. This was possible by making extensive use of carbon fibre-reinforced plastic (CFRP), including for the roof weighing 6 kg less than its metal counterpart . The roof is also 25 percent lighter than that of the M4, thus further contributing to the coupe’s diet.

2018 BMW M4 CS
2018 BMW M4 CS

Even the cabin has been subjected to a few changes to eliminate fat by using compacted natural fibres for the door panels and the side trim in the rear compartment. In addition, BMW has installed lightweight loops, and for the same reason, there’s only a single-zone climate control system and a bespoke variant of the audio system.

There’s more to the CS than its upgraded engine and weight loss as BMW’s engineers have also tweaked the suspension by revising the spring and damper settings as well as installing new lightweight 19-inch front / 20-inch rear wheels. The slightly modified body optimises airflow underneath the car thanks to a new front splitter and rear diffuser.

Check out a couple of M4 special editions:

All of these upgrades have enabled the BMW M4 CS do a lap of the Nürburgring in 7 minutes and 38 seconds, which makes it 10 seconds slower than the mighty GTS, but 14 seconds faster than the regular M4 equipped with the DCT. The new M4 CS costs £89,130 in UK and it will be on sale until the middle of 2018.

Source: BMW

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