why call it 6.3 if its a 6.2litter?
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Joined: Mar 2014
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E63 sold, 1972 911S, '58 Speedster, 2021 GLE 63S, Turbo 997, Aston Martin V8 Vantage 69 911 Hotrod
I find this thread to be hilarious. The fact that we have owners, that buy these cars without knowing much about them. This is too funny, I knew more about my car than the salesman, because I reserched the product before buying it. I could tell you everything about the car. 
Last edited by rhart6; Jan 28, 2020 at 08:06 AM.
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Joined: Jan 2010
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C63 AMG
Think about it like this...
The M156 will be the last AMG V8 close to its moniker.
All the new 63's are just pretending
Wow and this thread is now 7 years old! time flies.....
The M156 will be the last AMG V8 close to its moniker.
All the new 63's are just pretending
Wow and this thread is now 7 years old! time flies.....
Last edited by Kriston; Jan 28, 2020 at 02:25 PM.
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Joined: Sep 2016
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From: NY
2010 C63 2019 GLA45
The famous 1968 300 SEL 6.3 was followed by the even more famous 1975 450 SEL 6.9.
This second one had a displacement of 6834 cc.
And nobody worries about calling it a 6.8. People won't even know which car is a 6.8 Mercedes.
Is the M156's displacement over 6.2? yes, by 8 cc.
Ok, so let's allow it to enter history as a 6.3, who cares..
As far as other cc related stories (circa 1985, so maybe/ not applicable):
Back in the old days, was talking to an engineer that was running the factory rally team for a Citroen derivative.
In the world of 1.3 liter engines, a few cc's +/- can make a difference and win a race.
Of course they were limited by the rules of the class with what they were allowed to do.
However, this is the factory we're discussing.. they can do things with engines..
Such as increasing engine displacement by parts selection. In the factory, things were sorted and in bins: pistons, con rods, etc. You can definitely build a "factory freak" by biasing the selection.
He said that the advertised compression ratio and displacement cc's are the average ones. The +/- (and this is my vague recollection) can be 5cc or so, in that small engine.
In a large displacement engine, what if the real displacement is
6200-6255 cc?
Who's to say that your M156 doesn't have 6250 cc?
This second one had a displacement of 6834 cc.
And nobody worries about calling it a 6.8. People won't even know which car is a 6.8 Mercedes.
Is the M156's displacement over 6.2? yes, by 8 cc.
Ok, so let's allow it to enter history as a 6.3, who cares..
As far as other cc related stories (circa 1985, so maybe/ not applicable):
Back in the old days, was talking to an engineer that was running the factory rally team for a Citroen derivative.
In the world of 1.3 liter engines, a few cc's +/- can make a difference and win a race.
Of course they were limited by the rules of the class with what they were allowed to do.
However, this is the factory we're discussing.. they can do things with engines..
Such as increasing engine displacement by parts selection. In the factory, things were sorted and in bins: pistons, con rods, etc. You can definitely build a "factory freak" by biasing the selection.
He said that the advertised compression ratio and displacement cc's are the average ones. The +/- (and this is my vague recollection) can be 5cc or so, in that small engine.
In a large displacement engine, what if the real displacement is
6200-6255 cc?
Who's to say that your M156 doesn't have 6250 cc?
