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A4 vs. MN6

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Old May 21, 2008 | 10:21 PM
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Default A4 vs. MN6

Okay so everyone knows there is less drivetrain loss with a manual gearbox compared to an automatic. I haven't driven an MN6 as spiritedly as I have my own car, but has anyone driven both an auto and manual car of similar condition and noticed too much of a difference in performance?

-Alex
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Old May 21, 2008 | 10:27 PM
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Manual cars typically out perform their automatic brothers because you can more easily throttle steer and engine brake...

As far as stop and go, a stock A4 comes with 2.73 or 3.15 gears, vs a MN6 3,42, so yes there is a noticeable difference there as well.


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Old May 21, 2008 | 10:30 PM
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I havent noticed a big difference in performance. I just find it more fun to manually shift through the gears when im doing some "spirited" driving. Now when im sitting passenger, i still get put back in my seat whether its a an A4 or M6.
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Old May 21, 2008 | 10:36 PM
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Originally Posted by Willfulone
As far as stop and go, a stock A4 comes with 2.73 or 3.15 gears, vs a MN6 3,42, so yes there is a noticeable difference there as well.


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Okay I am unfamiliar to gear ratios, so those numbers are a foreign language to me. Can you explain further please?

-Alex
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Old May 21, 2008 | 10:44 PM
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Originally Posted by AlexSmith
Okay I am unfamiliar to gear ratios, so those numbers are a foreign language to me. Can you explain further please?

-Alex
The higher the numbers the lower the gear ratio. That means better accelleration and less gas mileage. A very good mod for a guy with an A4 tranny would be the 3.42 rear gears. Check the forum. There are many folks who have done it and have been very pleased.

Other options are 3.73 are 4.10s but I think those are too steep for an A4. That however is just my humble opinion. Some other person who is more knowledgeable on this may post some better info.
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Old May 21, 2008 | 10:47 PM
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Doesn't smaller gears mean lower top speed also?

-Alex
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Old May 21, 2008 | 10:52 PM
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That is true, but how often do you cruise above 150?
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Old May 21, 2008 | 10:54 PM
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Old May 21, 2008 | 10:59 PM
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Originally Posted by Jacks02
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Old May 21, 2008 | 11:01 PM
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Originally Posted by CamachoSF
That is true, but how often do you cruise above 150?
If I answer that this thread will get locked .

-Alex
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Old May 21, 2008 | 11:11 PM
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Originally Posted by Jacks02
Originally Posted by jornahow
You read the title. No one forced you to enter the thread.

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Old May 21, 2008 | 11:16 PM
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Originally Posted by Jacks02
Originally Posted by jornahow
Actually when I searched everything that came up were for sale threads, but thanks for the valuable input .

-Alex
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Old May 21, 2008 | 11:32 PM
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Both my C5s are automatics with 3.15 gears...My C6 Z06 is a 6 speed of course, with 3.42 gears....If I could have gotten an automatic in my Z06 I would have.....I get VERY tired of shifting......Also, the A4 has a final drive ratio of .7 to 1 if I remember right...whereas the 6 speed has a 5th gear ratio of .7 to 1 and a 6th gear (final drive) ratio of .5 to 1......This causes the engine to "lug" in 6th gear, unless youre doing triple digits (JMO)...Even with 505hp on tap it still "lugs" then engine at normal hwy speeds..At 60 mph in 6th gear Im only revving about 1200 rpm....because of such, I seldom shift out of 5th gear in my Z...I dont like to see rpms below 2000 unless Im idling!!!

Last edited by The NNIAL8R; May 21, 2008 at 11:34 PM.
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Old May 22, 2008 | 07:48 AM
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Originally Posted by Cozmo
You read the title. No one forced you to enter the thread.

I agree Cozmo. I have been a member here for a while and I still see new threads that have interesting and valuable info in them and yet they get hit with the 'beating a dead horse' icon.

One frequent thread is "what tires should I buy?" Even though it has been asked a million tires it is still interesting to see the replies and different points of view. I am always interested in opinions regarding stall converters. I read every post I see like that.

Alex there is nothing wrong with the question - post away.
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Old May 22, 2008 | 08:46 AM
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simple answer is what the car is being used for?

Drag Racing- Automatic
Road Racing- manual
heavy traffic-automatic

It comes down to preferance and what the car is being used for. There is no right answer on this one.
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Old May 22, 2008 | 08:57 AM
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Originally Posted by Chris@East Coast Supercharging
simple answer is what the car is being used for?

Drag Racing- Automatic
Road Racing- manual
heavy traffic-automatic
Street Racing-automatic

It comes down to preference and what the car is being used for. There is no right answer on this one.
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Old May 22, 2008 | 08:57 AM
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I was asking purely on a performance aspect, but you are right. Actually I should have been more specific. When reading the articles about test drives and acceleration times, mags such as R&T and Motortrend always opt for the manual(understandibly) so when they get those 0-60 numbers, I was wondering how much a difference in performance the auto is marginalyzed by the manual.

-Alex
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Old May 22, 2008 | 08:58 AM
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Originally Posted by AlexSmith
Okay so everyone knows there is less drivetrain loss with a manual gearbox compared to an automatic. I haven't driven an MN6 as spiritedly as I have my own car, but has anyone driven both an auto and manual car of similar condition and noticed too much of a difference in performance?

-Alex
^^I have owned C5s with both manual and auto. The vette with the auto had the 3.15 performance axle (rear gears). The manual is the MN6.

In terms of acceleration I would say they are about the same, although the auto seemed to give you a more kick in the seat of the pants feel. If what you care about is straight line acceleration the auto is the better route to go. If you care about overall performance then the manual should be your choice.

Overall, I like the manual better because you drive the car rather than it driving you.
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Old May 22, 2008 | 09:19 AM
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If you want magazine 0-60 times then this is what you'll get.

MN6 - 4.7 sec
A4(3.15) - 4.9
A4(2.73) - 5.1

As you can see the MN6 is generally tested as the fastest. Partly because of the gearing advantage and partly because in the right hands and manual can snick off a quicker more power efficient shift.
However, in the wrong hands a manual can be considerably slower.
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Old May 22, 2008 | 09:24 AM
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Mn6 LS1 also has a bit more torque.
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