Top speed unrestricted
Junior Member
Joined: Mar 2020
Posts: 44
Likes: 8
From: Baton Rouge, LA
2020 GLC 63 AMG
The GLC63s is governed to 174 mph top speed; the GLC63 is governed to 155 mph top speed. If the electronic limiters were removed, they would both likely go a good bit faster.
Out Of Control!!
Joined: Nov 2018
Posts: 11,432
Likes: 5,342
From: San Francisco Bay Area
2019 C63CS
That's something you can calculate using the Cw value and the frontal area of the car. Don't have the formula off the top of my head, and you need the specs, but it all comes down to how much aerodynamic drag the 503 bhp can overcome, keeping in mind that the power requirements increase exponentially. To go twice as fast you need four times as much power. It likely won't do much more as the aerodynamics are rather poor and being an SUV it has a very big frontal area. Consider that the C63S is limited to 180 mph whereas as stated above the GLC63S is limited to 174 mph. That tells you something. The C63S would probably top around somewhere between 190-200 mph, maybe it could break 200 mph, but the GLC won't pull that off.
