BMW M teases the new M5 CS with 635hp, unveil in January 2021 Home » Models » BMW M5 » BMW M teases the new M5 CS with 635hp, unveil in January 2021 BMW M CEO Markus Flasch goes in front of the camera to tease the upcoming BMW M5 CS. We were supposed to join Markus last week to see the new super sedan, but unfortunately, the COVID-19 pandemic had some another plans for us. The 2021 BMW M5 CS will be unveiled in January of next year and will bring to the table some amazing performance. We all know the standard M5 is fast enough to deform your eyeballs under full-throttle acceleration. But you’d never expect such a car to lap any track faster than a purpose-built, track-ready sports car. Except that’s what happened earlier this month, as the BMW M5 CS prototype lapped the Lausitzring faster than a 991-generation Porsche 911 GT3. The lap time was done by AutoBild’s Guido Naumann, who record a very impressive 1:31.88 in the BMW M5 CS. Compare that to the previous-generation Porsche 911 GT3’s 1:32.00 and the M5 CS is only faster by a fraction of a second.