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      05-18-2014, 01:10 AM   #1
Asbjorn
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M4 vs tuned Z4

So because apparently I am only 16 years old, I spend a good deal of time comparing times on fastestlaps and was surprised by what I found.

Model / Power / weight / 100-200km/h
New M3/4 430hk 1615kg 9s-9.5s https://www.youtube.com/watch?v=vGJZ8b3PLec
Corvette C7 466hp 1652kg 10.4 http://www.zeperfs.com/en/fiche4701-...7-stingray.htm
Porsche 991s 400hk 1486kg 10.4 http://www.zeperfs.com/en/duel2719-4087.htm
Z4 ESS 390hk 1605kg 11.8s (according to my own video)
M550dx 380hk 1955kg 12.1s
1M coupe 340hk 1570kg 12.4s (factory claim)
Z4 35is 340hk 1605kg 12.5s https://www.youtube.com/watch?v=fRVs1iCitzo
M235i 320hk 1560kg 13s https://www.youtube.com/watch?v=Gsbq35yU1ks
Z4 35i 300hk 1605kg 13.5s

All weights are EU weights and including DCT for the BMWs (not sure about the P and C cars).

I am not sure about the data-point for the M550dx, but what a mighty diesel...

Anyway, what surprised me was that the M4 making 550NM and 430hp was so much faster than the Z4 ESS stage 2 also making 550NM and 390hp. I knew it would be faster, but not that much faster.

Since we do not have any dyno results for the M4 I tried to overlay the various ESS stage 2 dyno results with the graph provided by BMW M Marketing. Here is the result, and it somewhat explains why the M4 is so much faster.

I guess dethrottling (upgraded IC and exhaust) is really king!

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      05-18-2014, 09:22 AM   #2
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thank you for the research and sharing . . . the M4 is very fast
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      05-18-2014, 05:09 PM   #3
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Very interesting. I would like to see a comparison of an FBO Z4 with a Stage 2 Cobb tune.
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      05-19-2014, 12:38 AM   #4
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BTW, the bi-turbo N55 used in B3 is rated at 410hk and 600NM

http://www.alpina-automobiles.com/en...ta/saloon.html
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      05-19-2014, 11:33 AM   #5
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The comparison with F8x vs C7 vs 991s is very interesting.

Did both 991s and f8x have Pdk/dct?

FBO n54 seems like it traps around 115-116mph so my guess is similar times to stock C7 and 991s
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      05-19-2014, 03:42 PM   #6
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I will take a vid soon of this but I believe that I will be around 10 on my Cobb PTF E50 map.
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