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I like cookies.
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18,102 Posts
Discussion Starter · #1 ·
http://bimmer.roadfly.org/bmw/forums/e85/forum.php?postid=1142556&page=1

Cool

The bodyshell: very strong and extra-light all in one.

The BMW Z4 was conceived and designed from the ground up as a classic
roadster. Offering torsional stiffness of 14,500 Nm/degree, the Z4
ensures a level of body rigidity and strength never seen before in the
convertible and roadster segment. The results are even less body
'twist', absolutely no rattling noise, and an even more intense
feeling on the road. Clearly, this provides the perfect answer to the
usual conflict of interests between saloon-like vibration control and
a dynamic, sporting set-up of the chassis and suspension.

The bodyshell features a Y-shaped load-bearing structure with the
chassis legs extending from the bulkhead down the sides along the
sills and the propeller shaft tunnel. Reinforcements in the
underfloor, between the spring strut domes and on the windscreen
frame serve to enhance torsional stiffness to an even higher standard.
Weight reduction and lightweight technology where really appropriate
make the Z4 2.5i a top-flight athlete weighing a mere 2777 lbs. with
the Z4 3.0i weighing in at an only slightly heavier 2844 lbs. By
comparison, both models are able to carry a load of up to 660 lbs.,
depending on their level of equipment, which is very generous indeed
for a roadster.
14,500 Nm/degree is the same (maybe better?) than the E46 coupe, right? Impressive. Both models are more than 100lbs lighter than the Z3 they replaced, excellent...

Video
http://cars.msn.co.uk/paris/streamingvideo/

Pictures
http://www.sportscartesting.com/news/none/id453/pg1946
 

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Rest in peace, Coach
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9,106 Posts
WTF? 14,500 is BETTER than E46 sedan torsional rigidity. Sedan is 14,400 Nm. sans the fold down seats. Coupes are 12,000 Nm.

So let me get this straight...The Z4 is structurally MORE RIGID and lighter than the E46 and has the same engine offering. Damn, if they bothered to put the S54 in that car it will OUT PERFORM an E46 M3 in stock form...it will even out perform and out corner an E46 M3 CSL.

Phuck it, I'm trading in my 323Ci!
 

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Registered
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319 Posts
Shweet... and I'm gonna win the 1st one.
What's going on Chris? Long time no chat. Hey, I am sorry, I think I am going to be flying to SC on October 21st to get the first Z4!!!!! Give my best to "T."
 

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Head-In-Sand Dumbass
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2,192 Posts
325xi-SteelGray said:


What's going on Chris? Long time no chat. Hey, I am sorry, I think I am going to be flying to SC on October 21st to get the first Z4!!!!! Give my best to "T."
What's up! How are you doin? T is good, Pete's good too... just kickin it lately. Trying to relocate to New York sometime... man that'd kick ass.
 

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OMGWTFBBQ
Joined
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11,262 Posts
The HACK said:
WTF? 14,500 is BETTER than E46 sedan torsional rigidity. Sedan is 14,400 Nm. sans the fold down seats. Coupes are 12,000 Nm.

So let me get this straight...The Z4 is structurally MORE RIGID and lighter than the E46 and has the same engine offering. Damn, if they bothered to put the S54 in that car it will OUT PERFORM an E46 M3 in stock form...it will even out perform and out corner an E46 M3 CSL.

Phuck it, I'm trading in my 323Ci!
Don't know if these numbers are accurate, but they are the ones that have been bandied about in the past.

Sedan 18,000 Nm
Sport Wagon w/fold down seats 14,000 Nm
Sedan w/fold down seats 13,000 Nm
Coupe w/fold down seats 12,500 Nm
Convertible 10,500 Nm

From: http://bimmer.roadfly.org/bmw/forums/e46/archives/forum.php?postid=480428&page=5
 
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