BMW has revealed a stronger and track-focused model of the M4 as the newest entrant into its motorsport-inspired CS lineage.
Following on from the prevailing ‘Competition Sport’ variations of the M2, M3 and M5, the brand new M4 CS has extra energy, much less weight and a reworked chassis set-up in contrast with the Competition automobile, in a bid to enhance its straight-line efficiency and on-limit dealing with.
It packs the upgraded model of the M4’s twin-turbo 3.0-litre straight six that featured within the limited-run CSL, upping its peak energy from 523bhp to 543bhp with a rise in turbo enhance strain from 1.7 bar to 2.1 bar.
Although the CS doesn’t produce any extra torque than the Competition, it sustains its 479lb ft peak for an extra 220rpm on the prime finish of the rev vary, holding it from 2750rpm to 5950rpm.
The powertrain has additionally been reworked to be able to endure lengthy classes on the monitor: the engine’s cooling system is improved, for instance, and the provision of oil to the clutch has been elevated to make sure the four-wheel drive system maintains its efficiency.
Stiffer engine mounts, that are bespoke to the CS, are additionally mentioned to enhance the powertrain’s responsiveness.
In addition to additional energy and adaptability, the CS can be 20kg lighter, courtesy of a titanium exhaust silencer and numerous carbonfibre-reinforced plastic (CFRP) parts, together with the centre console, gearbox paddles and numerous inside trim items.
With much less weight and further efficiency from the engine, the CS cuts the 0-62mph dash time from 3.5sec within the Competition coupé to three.4sec, whereas its 50-75mph time is quoted at 2.6sec in fourth gear and three.3sec in fifth.
The CS’s chassis has been tuned to enhance steering precision and wheel management, with stiffer springs and anti-roll bars which might be additionally mentioned to cut back roll by tight bends.
The stability management system has additionally been reprogrammed to lift the restrict at which it intervenes to right a slide.