I was browsing autotrader, and I noticed something interesting between 2 E90 M3 coupes; one a 2009 and one a 2012. can someone help answer this for me?

The question is about where the tachometers say the engine redlines.

for example; look at where redline is in the 2009 Performance Pack E90 M3 coupe:

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as you can clearly see, the car relines at 8,250RPM.

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Now, take a look at a tach from a 2012 Performance Pack E90 M3 coupe:

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it’s redline is marked at 7,750 RPM.

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That is the only difference between these two cars, and as you can tell they both have very similar mileage, so it’s not something that age causes. i’d greatly appreciate your help guys.