BMW M4 CS – Finally Downunder!

MyDrive | BMW Australia – Following a great tradition of high-powered straight six-cylinder engines, the BMW M4 CS uses the latest specification of the twin-turbocharged 3.0-litre straight-six first seen in the current-generation M4 range.

Featuring a rigid closed-deck cylinder block, forged crankshaft and arc-sprayed cylinder walls, the six-cylinder is light and strong with minimal friction loss and outstanding high-rev capability, all the way to a 7,600rpm red-line.

This powerhouse uses two mono-scroll turbochargers for superb response. Thanks to a combination of high-precision, direct fuel injection, fully variable VALVETRONIC valve timing and DOUBLE VANOS fully variable camshaft timing, the M4 CS’s engine offers strong throttle response as well as efficiency and outstanding specific power. A lightweight magnesium oil sump ensures lubrication at up to 1.4g cornering load.

A dual-branch sports exhaust system with quad 80mm tailpipes adds an aggressive acoustic while keeping back pressure as low as possible. Electronically-controlled exhaust flaps further contribute to exhaust volume and gas flow depending on the vehicle’s load state and selected drive mode.

Changes in the engine’s electronic management system leads to a 7kW power increase over the M4 Competition, with 338kW available at 6,250rpm. Vitally, peak torque is improved by 50Nm to a round 600Nm, a match for the legendary M4 GTS. According to the BMW M dynamometer charts, the M4 CS peak torque figure is generated from 4,000rpm to 5,380rpm.

Equipped with the M Driver’s Package as standard, the BMW M4 CS is electronically-limited to 280km/h. Zero to 100km/h acceleration is achieved in only 3.9 seconds while NEDC fuel consumption is listed at only 8.4L/100km.

Power is transmitted to the rear wheels via a seven-speed dual-clutch transmission, which boasts its own oil cooler for sustained operation at even the highest loads. From there, drive is split across the rear axle via the electronically-controlled, multi-plate Active M Differential. This limited-slip unit can actively lock in a range from zero-100 per cent to maximise drive in the prevailing conditions, thanks to a combination of inputs taken from the DSC system, as well as accelerator position, vehicle yaw and the difference in wheel speeds.

Those seeking a fast getaway can also activate the M Launch Control function, which allows the driver to dial up a pre-selected rev range before lifting the brake for a traction-maximised burst off the line.

Should you wish for more manual control, the DSC system offers M Dynamic Mode, which loosens the stability control systems and engages Dynamic Traction Control. Full DSC deactivation is also possible.

A chassis designed for the sharpest response

The BMW M4 CS features specific tuning parameters for the Adaptive M Suspension, Active M Differential, DSC, ABS, M DCT and M Servotronic steering systems. The result is a Nurburgring Nordschleife lap time of 7 minutes, 38 seconds.

Taking the lead from the dynamic M4 Competition, the M4 CS’s aluminium-intensive suspension design can be adjusted across three settings: Comfort, Sport and Sport+.

The front suspension features a lightweight double-joint spring strut layout, while a five-link axle is used at the rear. All suspension links and wheel carriers are made from forged aluminium.

The suspension’s zero play ball-joints take a direct lead from motorsport, as does the rear axle sub-frame’s rigid bolted connection to the body structure.

As with the suspension damping, the driver can choose between Comfort, Sport and Sport+ settings for the electrically-assisted power steering.

Forged 10-spoke light-alloy wheels in Orbit Grey take their inspiration from the 2016 DTM championship-winning BMW M4 racer of Marco Wittmann. Weighing around 9kg per corner, the front wheels measure 9J x 19 inches, with larger 10J x 20-inch rims fitted to the rear and weighing less than 10kg each.

These advanced road wheels are fitted with aggressive Michelin Pilot Sport Cup 2 tyres that measure 265/35R19 up-front and 285/30R20 at the rear. These tyres – seen on the M4 GTS – offer maximum dry weather grip and traction. Those seeking a broader range of performance can instead specify Michelin Pilot Super Sport rubber.

Braking is provided via the M4 Competition’s M Compound Brake setup. Four-piston front brake calipers are backed up by two-piston rears.

Those seeking the ultimate in braking can specify the M Ceramic braking system, which features six-pot front calipers and four-pot rears along with extremely lightweight brake discs.

Bespoke exterior sets M4 CS apart

Immediately recognisable, the BMW M4 CS cuts a truly distinctive figure.

Extensive use of carbon fibre and carbon fibre reinforced plastic (CFRP) is evident and contributes to a weight of only 1,580kg (according to EU regulations, without driver).

Starting from the front, an exposed carbon fibre diffuser that is specific to the CS substantially reduces front axle ‘lift’. Twin LED headlights and black-painted kidney grille slats sit above the aggressive, three-part front apron and pronounced intakes that feed air to the engine and braking system.

CFRP forms the bonnet and its distinctive powerdome, which also aids under-bonnet heat dissipation and reduces weight by 25 per cent over the standard item. The roof is also CFRP and is 6kg lighter than a conventional steel roof, while simultaneously adding rigidity and lowering the car’s centre of gravity.

Moving to the rear, the prominent CFRP rear diffuser is taken from the M4 GTS and aids aerodynamic stability, while the exposed carbon ‘Gurney’ lip further encourages a reduction in lift. Also taken from the M4 GTS is the exclusive Organic LED rear lighting system.

Exterior trims benefit from the BMW Individual High-gloss Shadow Line finish. Black high-gloss finishers abound, the treatment applied to the side window trims and recess covers, the kidney grille and the side-mounted M ‘gills’ behind the front wheels. Rear M4 CS badging is completed with a silver chrome finish.

Lightweight Luxury: The M4 CS interior

Although more focused than the regular M4, the M4 CS’s interior still provides a high level of comfort and standard specification.

Stepping over the specific M4 CS door sill panels, you are welcomed by tactile Alcantara trim features that highlighting the cabin. This fine fabric is applied to the door armrests, passenger side dash trim (with etched ‘CS’ designation), centre console and the combination leather/Alcantara seat upholstery. As per the M4 GTS the fabric is applied with blue and red BMW M stitching to the steering wheel rim with 12 o’clock marker; a leather M steering wheel is available as a no-cost option.

The minimalist door cards are trimmed in a combination of Walknappa leather (upper section) and compacted ‘Nawaro’ natural fibres; a renewable resource. The doors also feature M-striped door pull straps for additional racing ambience.

Familiar to M4 Competition owners, the sports seats offer scalloped cut-out sections and provide effective lateral support, even in extreme cornering.

BMW’s latest iDrive6 infotainment system is fitted as standard to the BMW M4 CS.

Accessed via the standard Navigation system Professional 8.8-inch high-definition screen, this system features an easy-to-access, customisable tiled layout and simple operation via touch screen, iDrive controller or natural voice control.

Further evidence of the M4 CS’s performance driving bias is the specific single-zone air conditioning system and specially-adapted 12-speaker HiFi system.

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