Lighter than a Z3??

[Nickp997]

I presumed that a Z4 would be a far bit heavier than an equivalent Z3, so I started to look into how much by as I've got both sat in the garage currently.
But I was surprised to find this data for both the cars from the same source. I've read that BMW tried to save weight in the Z4 but is this right??

Taken from Parkers-

BMW Z3 Roadster 2.8 2d – Facts and Figures
01 Apr 1997 - 01 Jun 2000
Length
4025 mm
Width
1858 mm
Height
1293 mm
Weight
1360 kg

BMW Z4 Roadster 3.0i 2d – Facts and Figures
General
Production
19 Jun 2003 - 01 Oct 2003
Length
4091 mm
Width
1781 mm
Height
1299 mm
Weight
1290 kg

 

[Smartbear]

That weight looks suspiciously like the 2.0 figure, I'm sure I've seen the 3.0 z4 as around the same as the z3 in the mid 1300's?
Regards

 

[skelters]

From Wikipedia so it must be true!.....

https://en.wikipedia.org/wiki/BMW_Z4_(E85)

E85 & E86 Variants[edit]
Model Years Curb Weight[19] 0-100 km/h (62 mph)
time, sec[19]
2.0i 2005–2008 2,855 lb (1,295 kg) 8.2
2.2i 2003–2005 2,932 lb (1,330 kg) 7.7
2.5i 2003–2005 2,943 lb (1,335 kg) 7.0
2.5i 2006–2008 2,965 lb (1,345 kg) 7.0
2.5si 2006–2008 2,998 lb (1,360 kg) 6.5
3.0i 2003–2005 3,009 lb (1,365 kg) 5.9
3.0i 2006–2008 3,020 lb (1,370 kg) 6.2
3.0si 2006–2008 3,086 lb (1,400 kg) 5.6
E86 3.0si Cpe 2006–2008 3,075 lb (1,395 kg) 5.6
M Rdst 2006–2008 3,197 lb (1,450 kg) 5.0
E86 M Cpe 2006–2008 3,230 lb (1,470 kg) 4.8

 

[Smartbear]

Yep, heavier than the z3 according to wilkapedia
https://en.m.wikipedia.org/wiki/BMW_Z4_(E85)

 

[WLH]

See this link....
http://www.eastpazscca.org/z3-z4.html

 

[ben g]

Yeah i thought it was around 1360kg's. Definitely not under 1300 as it performs about the same as a new focus st which has more power but weighs more.

 

[stevo///m3]

Figures look dodgy to me...
Stevo

 

[Nickp997]

That weight looks suspiciously like the 2.0 figure, I'm sure I've seen the 3.0 z4 as around the same as the z3 in the mid 1300's?
Regards

They show the 2.0 as even less-

Model
2.0i 2d (05)
4091 mm
1781 mm
1299 mm
1220 kg

2.0i 2d (06)
4091 mm
1781 mm
1299 mm
1295 kg

TBH I'm still quite impressed if it's in the same ball park as the Z3 given the extra equipment / luxuries it seems to have. I thought it would've been about 200kgs heavier just by looking at them.

 

[sars]

Those maybe dry weights, the ones on wiki include petrol, driver and 1 piece of luggage

 

[Smartbear]

You could be right Sars, I know that bike manufacturers even remove engine oil & brake fluid to get the figures as low as possible! :roll:
Regards

 

[Nickp997]

Those maybe dry weights, the ones on wiki include petrol, driver and 1 piece of luggage

So not with a boot full of beers then? :icb:

 

[sars]

Those maybe dry weights, the ones on wiki include petrol, driver and 1 piece of luggage

So not with a boot full of beers then? :icb:

...and not with two prop's in the seats either :roll:

 

[cj10jeeper]

Factory brochure shows the 3.0i of 2003 to be 1.365kg so for once Wiki looks correct

 

[speed12]

I wonder what makes the 3.0si 30kg heavier than the 3.0i? Thought it was a lighter engine.

 

[cj10jeeper]

Yes - hadn't noticed before but the 2006 factory brochure echoes that difference

I think they added more sound deadening, but that wouldn't make 30kg, nor would the engine in reality be much lighter

 

[Smartbear]

I wonder what makes the 3.0si 30kg heavier than the 3.0i? Thought it was a lighter engine.

The engine is lighter (at the time it was the lightest production 6 cylinder engine available) but as mentioned above it has a considerable amount of sound deadening in the doors to give a nice "clunk" the 3.0si also has bigger brakes which would add to the weight.
I've read that bmw saved a lot of weight (around 20kg) just from the exhaust manifolds but this is obviously outweighed by the weight gained elsewhere.
Regards.

 

[Nickp997]

I wonder what makes the 3.0si 30kg heavier than the 3.0i? Thought it was a lighter engine.

The engine is lighter (at the time it was the lightest production 6 cylinder engine available) but as mentioned above it has a considerable amount of sound deadening in the doors to give a nice "clunk" the 3.0si also has bigger brakes which would add to the weight.
I've read that bmw saved a lot of weight (around 20kg) just from the exhaust manifolds but this is obviously outweighed by the weight gained elsewhere.
Regards.

20kg from exhaust manifolds!! That can't be right surely?? :rofl:

Maybe the whole engine?