Wild 467kW BMW M5 CS previewed

A hard-core BMW M5 CS is all primed to make its debut next month that will feature more power, bespoke styling and lightweight parts.

In a new teaser video BMW M CEO, Markus Flasch, showcased a lightly disguised flagship performance sedan ahead of its January 2021 debut.

Following in the tyre tracks of the recent BMW M2 CS, the changes to the M5 CS focus on detailed changes that include raising power, reducing weight and retuning the suspension for fast road and track use.

Under the bonnet, the regular BMW M5's 4.4-litre twin-turbocharged V8 has power boosted from the M5 Competition's 459kW to 467kW.

Like before, the M5's eight-speed automatic transmission and an all-wheel drive system carries over, with the latter capable of being decoupled for sideways antics.

Large carbon-ceramic brake discs are set to be standard, along with huge red callipers.

Maximising performance, BMW engineers have put the BMW M5 on a diet, adding more lightweight parts made of exotic composites that sees the kerb weight drop by around 70kg.

While that might sound impressive, the M5 CS will still tip the scales at 1870kg.

Some of the new parts include borrowing the same carbon-fibre bucket seats from the BMW M3 and M4.

The second row, meanwhile, ditches its middle seat, ensuring the M5 CS will be a strictly four-seater.

Other weight-saving measures include the addition of a set of matte gold 20-inch forged wheels, a colour that's also used elsewhere around the car, including the front grille.

Reflecting its motorsport theme, there's yellow-tinted daytime running lamps that are designed to mimic an endurance race car.

Helping distinguish it from the regular BMW M5 and M5 Competition, there's new exterior paint colours while inside there's an Alcantara and carbon-fibre cabin.

There's no word on performance, but since the all-wheel drive 460kW/750Nm BMW M5 Competition is claimed to hit 100km/h in 3.3 seconds, the M5 CS should be on track to hit 100km/h in less than three seconds and top out at more than 320km/h.

To cope with the power, the M5 CS will ride on a retuned chassis with springs and dampers more suited to fast road and track driving.

Tipped to be priced around $US10,000 ($A14,500) higher than the current BMW M5 Competition ($234,900), the M5 CS could top $250K in Australia, where only a handful of examples are likely to be offered.