And this is the most extreme of all BMWs. The M5 CS develops 635 horsepower, uses semi-slick tires and has every intention of establishing itself as the most efficient sedan in the world.

In the BMW M5 family, this is the most extreme of all. With 635 horsepower, the M5 CS also becomes the most powerful BMW in history with its 10 horsepower more than the M5 Competition. Under the hood, its twin-turbo V8 evolves very little and retains the same maximum torque (750 Nm) as the latter. Externally, the differences are not immediately obvious if we put aside the very radical matte green color of the model unveiled in pictures, associated with equally conspicuous copper rims.

But BMW Motorsport engineers have worked on several strategic points to make the most powerful M5 a real performance beast. The most important difference is undoubtedly at the level of the tires, with Pirelli P-Zero Corsa with a more radical profile than those of the other versions. With a softer rubber, these tires clearly contribute to the very impressive figures announced in a straight line: the 0 to 100 km / h in 3.0 seconds and the 0 to 200 km / h in 10.4 seconds are the beak for Mercedes- AMG GT63 S 4-Door Coupé and other Porsche Panamera Turbo S, the two sedans which accelerate the most in a straight line today (if we put aside the electric queens of 0 to 100 km / h). Note that its top speed is electronically limited to 305 km / h.

The new queen of sedans?

BMW engineers have also replaced certain body parts, now in carbon fiber reinforced plastic, resulting in a 70 kilogram gain on the scale compared to the M5 Competition. Add to that standard carbon-ceramic brakes, plus tweaked suspensions for better track efficiency, and you’ve got the best performing of any BMW in the lineup. Unfortunately, it’s also the most elite: with a base price of € 199,900, the M5 CS costs even more than the two most radical limousines of the moment, the Mercedes-AMG GT63 S and the Porsche Panamera Turbo S / S E-Hybrid. Will she be able to beat the latter on a lap on the track? This is what BMW recently suggested in a video shot on the Hockenheimring …