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      06-05-2014, 08:40 AM   #1
m3ct
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M4 vs B3 alpina biturbo acceleration

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      06-05-2014, 11:46 AM   #2
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wow that alpina is pretty quick.
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      06-11-2014, 07:53 PM   #3
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sometimes i feel as though alpina's stuff are told by bmw to not be faster than the m's
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      06-11-2014, 07:54 PM   #4
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So m4 with a tune would really pull away from B3...but stock for stock close.
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      06-11-2014, 07:54 PM   #5
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M4 is a not that much faster but very cool alpine numbers
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      06-11-2014, 07:55 PM   #6
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Quote:
Originally Posted by Maddict3
wow that alpina is pretty quick.
Yea how much is it? We all know how expensive the M4 is
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      06-11-2014, 08:09 PM   #7
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Wow, if you look at the first gear change that m4 sweeps through the rev band super quick.
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      06-11-2014, 08:14 PM   #8
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why did the alpina almost halt acceleration at around 2000 rpm? (look at the rpm gauge and u will see what I mean). That killed the race for it.
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      06-11-2014, 08:17 PM   #9
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Quote:
Originally Posted by rallybull
why did the alpina almost halt acceleration at around 2000 rpm? (look at the rpm gauge and u will see what I mean). That killed the race for it.
Either boost or traction
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      06-11-2014, 08:26 PM   #10
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Quote:
Originally Posted by shivaswrath
So m4 with a tune would really pull away from B3...but stock for stock close.
What's stock about an Alpina B3 ?

http://en.m.wikipedia.org/wiki/Alpina
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      06-11-2014, 08:28 PM   #11
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Interesting. That m somehow seems to just get up and go quicker. But defiantly would love to see what a nice tune would do on an m4.
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      06-11-2014, 08:37 PM   #12
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B3 is pretty fast thats forsure
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      06-11-2014, 09:24 PM   #13
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maybe if the B3 had a better Trans( M-dct ) _OR_ had the equivalent weight as M4
( i believe the M4 is 100kg lighter) they would end up as tie.
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      06-11-2014, 09:42 PM   #14
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Without LC on the M4, would actually be very close
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      06-11-2014, 09:59 PM   #15
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Quote:
Originally Posted by Zundefolge View Post
What's stock about an Alpina B3 ?
It's a tuner car
Alpina is a small volume manufacturer, not an aftermarket supplier/tuner.
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      06-11-2014, 10:03 PM   #16
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Seems to be about a second behind above 100kph, which is pretty big at those speeds. Several carlengths.
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      06-11-2014, 10:24 PM   #17
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Quote:
Originally Posted by mkoesel
Quote:
Originally Posted by Zundefolge View Post
What's stock about an Alpina B3 ?
It's a tuner car
Alpina is a small volume manufacturer, not an aftermarket supplier/tuner.
By that definition bmw M is a small volume mfg.....
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      06-11-2014, 10:31 PM   #18
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Quote:
Originally Posted by antzcrashing View Post
By that definition bmw M is a small volume mfg.....
Phrase it how you want but the Alpina runs an engine from the BMW factory but with a tune different (here, more aggressive) than that of the factory. If the M4 were to be in the same category, and thus be equipped with a tune more aggressive than that from the BMW factory, this race would not be as close. Nevertheless, this video goes to show that the Alpina is damn fast.
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      06-11-2014, 10:48 PM   #19
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B3 alpina biturbo damn faster!
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      06-11-2014, 11:26 PM   #20
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Quote:
Originally Posted by Supracg135 View Post
Phrase it how you want but the Alpina runs an engine from the BMW factory but with a tune different (here, more aggressive) than that of the factory. If the M4 were to be in the same category, and thus be equipped with a tune more aggressive than that from the BMW factory, this race would not be as close. Nevertheless, this video goes to show that the Alpina is damn fast.
The B3 is not an engine from BMW factory with an aggressive tune. It has a different turbo setup and cooling system, much the same way the M4 engine also has a different turbo setup and cooling system compared to an N55, but in a different way.

The M4 engine produces less torque at lower rpms and more torque at higher rpms compared to the B3 bi-turbo engine. It would be fair to assume that the B3 engine runs higher boost than the M4 engine, but is less de-throttled. I wouldn't know if the turbos are actually the same though. They could also have been taken from the N54 engine I guess...
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      06-11-2014, 11:28 PM   #21
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Quote:
Originally Posted by antzcrashing View Post
By that definition bmw M is a small volume mfg.....
What definition? Alpina is indeed a manufacturer.

http://en.wikipedia.org/wiki/Alpina

Quote:
Originally Posted by Asbjorn View Post
The B3 is not an engine from BMW factory with an aggressive tune. It has a different turbo setup and cooling system, much the same way the M4 engine also has a different turbo setup and cooling system compared to an N55, but in a different way.
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      06-11-2014, 11:45 PM   #22
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In 2nd gear, the M4 seemed to get stuck a bit at 5500 rpms then farted and kept going. It was strange. Lose traction?
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