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I wonder why ?

Specific discussion about the E89 2009 Z4 (sDrive35is, sDrive35i, sDrive30i, sDrive23i)
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ric19
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I wonder why ?

Post by ric19 » Wed Sep 21, 2016 11:42 am

Just had my 28i in for its 2nd MOT and was perusing the (single) Z4 brochure that was left, and was looking at the car specs and noticed all the range including the 35is had 70A batteries but the 28i was the only one to have an 80A battery, cant for the life of me think why that would be, any thoughts ?
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Chris_D
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I wonder why ?

Post by Chris_D » Wed Sep 21, 2016 11:53 am

it's obvious. 28is is pipe-smokers choice.
extra juice required when pipe-smoker lighter/package specced.
yw :thumbsup:
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ric19
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I wonder why ?

Post by ric19 » Wed Sep 21, 2016 12:04 pm

Oh yeah.. Obvious really :)
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Mobeer
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I wonder why ?

Post by Mobeer » Wed Sep 21, 2016 4:04 pm

Mis-print maybe?

The US brochure available from here says 70aH for all:
http://www.bmw.com/com/en/newvehicles/z ... nload=true
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buzyg
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I wonder why ?

Post by buzyg » Wed Sep 21, 2016 4:08 pm

Just think of all the extra gizmos you can plug in. :D :hairdryer:
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ric19
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I wonder why ?

Post by ric19 » Wed Sep 21, 2016 5:13 pm

JusT checked my brochure which is the old one before LCI and it's the same in there..
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Nictrix
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I wonder why ?

Post by Nictrix » Wed Sep 21, 2016 5:26 pm

Stop start technology used in the 4 cylinder models maybe requires a stronger battery??
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ric19
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I wonder why ?

Post by ric19 » Wed Sep 21, 2016 6:05 pm

Same engine in essence as the 2.0 and 1.8 and they use stop/start too and they are 70A batteries
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flybobbie
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I wonder why ?

Post by flybobbie » Wed Sep 21, 2016 7:10 pm

There are different battery capacities out there because when I enquired about adding Servotronic to my 23i car, BMW came back and said not only a software upgrade, but also need to upgrade battery and alternator.
So is Servotronic an option on the 4 potters.
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DanHZ4
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I wonder why ?

Post by DanHZ4 » Sat Sep 24, 2016 11:36 pm

Most likely because the 28i has stop start requiring a more powerful battery. My 08 mini had a more powerful battery for this reason.
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ric19
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I wonder why ?

Post by ric19 » Sun Sep 25, 2016 10:47 am

As I said earlier. .intrinsically the same engine as a 18 and a 20 and they are 70A so why is a 28 out of the whole range 80A ? All the 2L are Stop/Start so that doesn't really add up does it ?
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