Theoretical Maximum Speed Calculator (v2016)

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It is a fast load-lugger, but not that fast! I've clearly made an error somewhere in gathering my figures. I will check...


No problem, that's a very fast load lugger you have there :)

VMax Calculator (v2016)
S212 E500 467 BHP
Theoretical VMax 194 mph
Owner's name SW18
Model S212 E500
Transmission losses 18%
Power (flywheel) 467 BHP
Vehicle track 1.604 m
Vehicle height 1.471 m
Mass (weight) (kg) 1925 kg
Drag coefficient 0.29
Author: Bobby Dazzler
 
It is a fast load-lugger, but not that fast! I've clearly made an error somewhere in gathering my figures. I will check...

For comparison this is

VMax Calculator (v2016)
W212 E63 AMG 525 BHP
Theoretical VMax 189 mph
Likely speedo 202 mph
Owner's name SW18
Model S212 E500
Transmission losses 18%
Power (flywheel) 525 BHP
Vehicle track 1.625 m
Vehicle height 1.471 m
Mass (weight) (kg) 1840 kg
Drag coefficient 0.36
Author: Bobby Dazzler
 
Ok,I have checked again and for sure my power figures were wrong; I misunderstood. I have 383hp at the flywheel. And I've checked again about drag coefficient figures, as the number in your comparison seems high at 0.36. Most online sources do seem to show the W212 as 0.26 and the S212 as 0.29, so I have stuck with the 0.29 (the new W213 has a Cd of only 0.23).

So my new (hopefully more accurate) figures are:

SW18
S212 E500
18% transmission loss
383hp at the flywheel
1604mm track
1471mm height
1925kg mass (official kerb weight)
0.29 drag coefficient

For comparison this is

VMax Calculator (v2016)
W212 E63 AMG 525 BHP
Theoretical VMax 189 mph
Likely speedo 202 mph
Owner's name SW18
Model S212 E500
Transmission losses 18%
Power (flywheel) 525 BHP
Vehicle track 1.625 m
Vehicle height 1.471 m
Mass (weight) (kg) 1840 kg
Drag coefficient 0.36
Author: Bobby Dazzler
 
Last edited:
Ok,I have checked again and for sure my power figures were wrong; I misunderstood. I have 383hp at the flywheel. And I've checked again about drag coefficient figures, as the number in your comparison seems high at 0.36. Most online sources do seem to show the W212 as 0.26 and the S212 as 0.29, so I have stuck with the 0.29 (the new W213 has a Cd of only 0.23).

So my new (hopefully more accurate) figures are:

SW18
S212 E500
18% transmission loss
383hp at the flywheel
1604mm track
1471mm height
1925kg mass (official kerb weight)
0.29 drag coefficient

VMax Calculator (v2016)
S212 E500 383 BHP
Theoretical VMax 180 mph
Owner's name SW18
Model S212 E500
Transmission losses 18%
Power (flywheel) 383 BHP
Vehicle track 1.604 m
Vehicle height 1.471 m
Mass (weight) (kg) 1925 kg
Drag coefficient 0.29
Author: Bobby Dazzler

Still very fast if unlimited
 
Thank you!

I'm most unlikely to ever reach those kinds of speeds, but it's fun to know.

VMax Calculator (v2016)
S212 E500 383 BHP
Theoretical VMax 180 mph
Owner's name SW18
Model S212 E500
Transmission losses 18%
Power (flywheel) 383 BHP
Vehicle track 1.604 m
Vehicle height 1.471 m
Mass (weight) (kg) 1925 kg
Drag coefficient 0.29
Author: Bobby Dazzler

Still very fast if unlimited
 
Thread revival time:doh::D
I'm sure there are a few members, apart from me, interested in the theoretical top speed of their car.

Rob@Bobby Dazzler. If you have a spare few minutes, I'd appreciate your top speed calculation for my car.

AMGeed
W212 E63 biturbo.
18%
666bhp
1.625
1.471
1840
0.36




:thumb:
 
Thread revival time:doh::D
I'm sure there are a few members, apart from me, interested in the theoretical top speed of their car.

Rob@Bobby Dazzler. If you have a spare few minutes, I'd appreciate your top speed calculation for my car.

AMGeed
W212 E63 biturbo.
18%
666bhp
1.625
1.471
1840
0.36




:thumb:
My pleasure. I’ll do it when I’m next at the laptop 👍🏻
 
Thread revival time:doh::D
I'm sure there are a few members, apart from me, interested in the theoretical top speed of their car.

Rob@Bobby Dazzler. If you have a spare few minutes, I'd appreciate your top speed calculation for my car.

AMGeed
W212 E63 biturbo.
18%
666bhp
1.625
1.471
1840
0.36




:thumb:

My pleasure. I’ll do it when I’m next at the laptop 👍🏻
Before running the model, can I suggest a refinement to the assumptions? The Cd should probably be 0.26 rather than 0.36, as this lower figure is usually the value given for the W212 on car spec websites. It’s a slippery car that was designed for high speeds. The W213 is even slipperier at 0.23.

My bet is with the 666hp, it could well be a 200mph car...
 
I’ve found my laptop, looking for the power supply! 🤦🏼
 
Before running the model, can I suggest a refinement to the assumptions? The Cd should probably be 0.26 rather than 0.36, as this lower figure is usually the value given for the W212 on car spec websites. It’s a slippery car that was designed for high speeds. The W213 is even slipperier at 0.23.

My bet is with the 666hp, it could well be a 200mph car...
Bear in mind that the manufacturer's quoted Cd is very possibly for the lowest powered model and in ideal trim (ie, with some ducting closed ).
There's a world of difference in the cooling requirements for a 200hp and 600+hp car and that will appear as drag.
 
VMax Calculator (v2016)
S212 E500 383 BHP
Theoretical VMax 180 mph
Owner's name SW18
Model S212 E500
Transmission losses 18%
Power (flywheel) 383 BHP
Vehicle track 1.604 m
Vehicle height 1.471 m
Mass (weight) (kg) 1925 kg
Drag coefficient 0.29
Author: Bobby Dazzler

Still very fast if unlimited

Interesting. Back in the day I used to look into what one of my C43's would have done de-restricted and I reckoned it seemed to be 160-165-ish. Given than my first E500 had similar power, I assumed something similar or very slightly better due to superior aero.

Then given that the 212 had another 25% bhp I'd had a working figure of 170-something. Say 175 maybe?

To me this is amazing as I grew up reading Car road tests of 512BB's and the like which were the only cars to approach this sort of vmax.
 
Interesting. Back in the day I used to look into what one of my C43's would have done de-restricted and I reckoned it seemed to be 160-165-ish. Given than my first E500 had similar power, I assumed something similar or very slightly better due to superior aero.

Then given that the 212 had another 25% bhp I'd had a working figure of 170-something. Say 175 maybe?

To me this is amazing as I grew up reading Car road tests of 512BB's and the like which were the only cars to approach this sort of vmax.
Here's a vid of a derestricted E500 bowling past a restricted one that was itself doing 250kph. He says 300kph for the derestricted one, but the the speedo was filmed only in the slower car so we can't be sure. The speed delta looks quite significant though.

The channel is a good one for E500 fans, quite a few videos of them accelerating, plus various sound recordings with modified exhaust.

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