Subaru AWD vs Quattro IV
RA
IV system.
The difference tha I know of would be the Torsen center differential (on
Quattro) vs VC on Subaru.
The management system (is there one?) might also be different ?
Would daily drivers ever get to notice the difference ?
On anohter note, is the AWD system the same as the ones on the WRC cars?
Thanks
R Baker
he had and Audi and and Outback, both had the same
make/model tires on them and he claimed that when
driving/compairing the two during a winter storm that his
area had he noticed that the Outback held the road better,
neither got stuck but he was happier with Outback's AWD than
the Audi's Quattro system. I doubt it's still accessable
here (remarq) it's probably too old, you might be able to
find it on another system that goes further back.
I was actually surpised to hear this, I know the Subaru AWD
system is great but the Quattro system will direct power to
any individual wheel not just front and back like the
current Subaru system does (in North America, I believe all
other places get a LSD on the rear wheels [to direct power
from side to side between the two rear wheels], an item not
available until the 2000 model Subaru). Anyway, both are
good systems, and both will help in any winter weather you
might be worried about.
...Well that's how I understand it.
RB
**** Posted from RemarQ - http://www.remarq.com - Discussions Start Here (tm) ****
Byron Walter
RA wrote in message <9294689...@news.remarQ.com>...
manual transmission and defaults to a 90/10 front/rear power split which can
be varied in response to rotational variation between the front and rear
axles (don't know how much). A more complex system is used with the auto
trans. I believe it uses a computer controlled clutch pack which defaults to
a 50/50 split. It's interesting that these two systems are not at all alike
but both seem to perform just fine.
Audi has a Quattro system using the the Torsen (torque-sensing) center
differential combined with the front and rear diffs. This system responds to
torque rather than rotational differences as found with the VC system. The
Torsen system, like the Subie VC system, is mature and known for
reliability. The other Quattro system is based on a Haldex (spelling?)
clutch.
The current generation of Audi's AWD Torsen system is coupled to the
anti-lock braking system. At speeds of around 25 mph or less, the system
will note wheel spinning and apply braking to that wheel and traction to the
wheel in opposition. Well something like that... (what do I know?... not
much).
For more detailed (and accurate info) go to http://www.a4.org and go to the
forums. Do a search on Torsen AND AWD and you will find a heap of messages.
One of those messages has a link to a very good article on 4WD. In fact I
just attempted a search but got bumped out for some reason.
And the bottom line is that good winter tires are going to be more important
that the type of AWD you have.
I have an A4 and my sister has a Forester. Both great cars...
Byron
B. Harder
> Subaru, like Audi, has two AWD systems available. The VC is used with the
> manual transmission and defaults to a 90/10 front/rear power split which can
> be varied in response to rotational variation between the front and rear
> axles (don't know how much). A more complex system is used with the auto
> trans. I believe it uses a computer controlled clutch pack which defaults to
> a 50/50 split. It's interesting that these two systems are not at all alike
> but both seem to perform just fine.
NO NO NO! This is totally bass ackward. The manual starts with a 50/50
split and the auto starts with a 90/10.
Byron Walter
>Subaru, like Audi, has two AWD systems available. The VC is used with the
>manual transmission and defaults to a 90/10 front/rear power split which
can
>be varied in response to rotational variation between the front and rear
>axles (don't know how much). A more complex system is used with the auto
>trans. I believe it uses a computer controlled clutch pack which defaults
to
>a 50/50 split. It's interesting that these two systems are not at all alike
>but both seem to perform just fine.
>
Well, someone already noted that I got it backwards... the 90/10 is actually
the auto trans and the 50/50 for the manual tranny.. Thanks for the
correction!
Byron
NOSPAMm...@accel.net
My understanding is that the auto starts from a stop at 50/50 and as speed
increases and gears shift, it moves into the 90/10... so says my mechanic at
the dealership anyway...
Jim Untch
split...from the many discussions on this newsgroup I believe it's
50/50...I'm considering getting an automatic in my next subaru(I'm getting
old&my wife sits in rush-hour traffic!) Has anyone noticed any awd drawbacks
going from a stick(50/50), to an automatic(90/10)?
Byron Walter wrote in message <7k6fkh$nj1$1...@bgtnsc01.worldnet.att.net>...
NOS...@iserv.net
I like the auto better due to the type of driving I do. RUSH HOUR, BUMPER TO
BUMPER
karlhun...@my-deja.com
It had a shift knob that allowed it to move from FWD to 4WD and
therefore had a 50/50 set up. It handled amazingly in the snow, slow
or fast. I say this because I actually had a slide that almost was an
accident last winter. The trick was that I was going a little fast and
the Outback fish tailed, this wouldn't have happened in the Toyo, but I
believe that the at 0 mph 50/50 and then the 90/10 caused it. When you
are moving the inertia of the vehicle around turns will be one of the
major factors for an uncontrolled slide. I believe that the 90/10 is a
fuel saving mode that the People at Fuji Heavy industries utilize,
however, it reduces the effectiveness of the AWD when the vehicle is in
motion.
I would say that if the standard had a 50/50 arrangement, then it would
be much more functional, than the Automatic, in all situations.
In article <92949756...@news.remarQ.com>,
Sent via Deja.com http://www.deja.com/
Share what you know. Learn what you don't.
R Baker
As I understand it the A/T Subaru will start with a 50/50
split in 1st gear but as it moves up 1-2 gears it switches
to the 90/10 split to save gas. But the AWD system is
always on so at any time, in any gear if a wheel slips power
will be shifted accordingly. I've been told differnt things
about whether or not it starts with the 50/50 split or if
it starts with the 90/10 split...one way or another IT WORKS
so it doesn't really matter too much.
here are two web pages that discuss AWD/4WD, The first one
is entirely Subaru AWD the second one is just about the
differnt types on the market:
http://www.ai-online.com/vehicle/subdrive.htm
http://4wd.sofcom.com/A/Diff.locks.html
and lastly,
I think the Subaru AWD system is great but just a question
about the A/T AWD system...I drive a M/T so it's not a real
concern of mine...Since the AWD system is electronic,
couldn't subaru incorporate a 4WD button/lever for those who
really want it, then when the button is pushed (although the
AWD will be on prior to it being pushed) it locks the
differntial in a 50/50 split?...maybe even to the point of
25% of the power to each wheel to reduce the possiblity of
getting stuck, like the current AWD system has. I'm not
sure if I did a good job at describing what I ment...I'm
still half asleep.
It just seems that some people on this board still love
there old Subaru's with the 4WD lever, and they seem to feel
that it handled better off road. So couldn't subaru some
how combine the two (AWD and 4WD) in there auto trans.? The
only draw back is it might look like "selling out" to the
4WD fad (and yes it is a fad) in america. And subaru has
always seemed to go it's own way, and not follow others or
"stay with the flock" so to speak.
I don't know this was just a thought that I had yesterday so
if you don't understand it, ignore it. And if you understand
it...ignore it.
Frisco Frank
great in the snow. I saw a post where the person posting had both a
standard and an automatic and said the automatic actually slipped a little
less in the snow. The automatic has a more complex all wheel drive system,
as it uses a computer in conjunction with the automatic in determining where
the power goes.
Frank
<jimu...@apci.net> wrote in message news:3766e...@queeg.apci.net...
> My subaru salesman(who gave me a good deal)told me my 90 awd was a 90/10
> split...from the many discussions on this newsgroup I believe it's
> 50/50...I'm considering getting an automatic in my next subaru(I'm getting
> old&my wife sits in rush-hour traffic!) Has anyone noticed any awd
drawbacks
> going from a stick(50/50), to an automatic(90/10)?
karlhun...@my-deja.com
I mean it would only take a toggle switch and a memory switch!
Problem would arise in reliabilty and maintanece. By making it with a
static differential someone (idiot probably) could get on dry asphalt
and rip the differential to shreds, and that doesn't equate to reliable.
In article <9295482...@www.remarq.com>,
Howard Hanson
>
> Just wondering about performance between the Subaru AWD and the Audi Quattro
> IV system.
> Would daily drivers ever get to notice the difference ?
>
I have an '98 Audi A4 Quattro a '99 Forester, both manual transmissions
(and let me add my vote to the 50/50 split for Subaru manuals and the
90/10 split for the automatics--forgot where I've read this, though).
The Audi, of course, has far more power and is much lower and therefore
handles better. In terms of the AWD, though, there's a difference only
on snow or gravel. The Audi AWD seems more "on" all the time and
therefore is somewhat more prone to a fishtail response on accelerating
in low-traction curves. The Subaru AWD, because it has a slight lag
associated with the hydraulic center diff, doesn't do this quite as
much. (Part of this is the power difference; it feels like part is the
AWD.)
Another difference, as you undoubtedly know already, is the cost
associated with the different cars. HPH
Stuart
Chhabra) wrote:
If I recall correctly, anyway. It's important to note that
>Subaru will have a limited-slip rear differential for the 2000MY. I'm not
>sure if this is on all models, or just on the higher-end ones.
>
>first hand that it works incredibly well.
Where did you get this info on my2000 from??
Stuart
R Baker
(not the best) that I can remember off the top of my head
is:
it should still be up.
As I understand it the LSD in the rear will be standard on
the limited outback...and maybe the entire OB line (but not
the OBS...yet) It will be on the Forester S, but not the
Forester L...it'll either be standard on the S and an option
on the L or it'll be an option on the S and not available on
the L...one way or another (as I understand it) it's not
available on the base model Forester. Eventually it will be
standard on all Subaru's but that'll take a few years.
Well this is my understanding of it...it wouldn't be the
first time I was wrong though.
CGreer5424
Incredible torque launches me a half-block before manual trannies are back in
gear and moving.
Charlie