s63e Top speed
Out Of Control!!
Joined: Nov 2018
Posts: 11,452
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From: San Francisco Bay Area
2019 C63CS
I haven't done the theoretical top speed calculations, but you may find that it doesn't go as fast as you think, because the peak ~800 hp are only available for 10 seconds at a time. The sustained power is quite a bit lower. One of the complaints of these new E Performance powertrains has been that the performance on the German Autobahn is inconsistent, because you can't count on the peak power. FWIW, the Mansory S63 E does 320 km/h, with an increased peak power of 880 hp. I'm guessing they up'ed the engine power so it has a higher sustained power.
Last edited by superswiss; Mar 30, 2024 at 02:31 PM.
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How come nobody, not even the sellers, talks about the "10-second peak at 800hp"? From what I know, it's supposed to have 800hp, not 10 seconds at 800hp, right? What is the HP without the boost then and how can we see it? Dang, I'm pretty confused now. But I don't think the top speed has anything to do with that anyway, the car goes to 299km/h without difficulty and it feels like the top speed is electronically capped at 299.
Out Of Control!!
Joined: Nov 2018
Posts: 11,452
Likes: 5,352
From: San Francisco Bay Area
2019 C63CS
How come nobody, not even the sellers, talks about the "10-second peak at 800hp"? From what I know, it's supposed to have 800hp, not 10 seconds at 800hp, right? What is the HP without the boost then and how can we see it? Dang, I'm pretty confused now. But I don't think the top speed has anything to do with that anyway, the car goes to 299km/h without difficulty and it feels like the top speed is electronically capped at 299.
Horsepower does matter when it comes to top speed. It's exponential. To go twice as fast you need four times the power to push through the air, so top speed is very much a function of horsepower. I don't know what the sustained power is for the S63 E. It's over 100hp down from peak, but I haven't looked for the exact numbers. FWIW, for the C63 S E, the peak is 671 hp, but sustained is only about 540 hp, so quite a drop and combined with the much higher weight, the power to weight ratio isn't actually much better than the previous generation if at all.
Last edited by superswiss; Apr 1, 2024 at 02:36 PM.
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