Engine Start-Stop/Cylinder On Demand?
01-21-2013, 06:09 PM
#11
I don't agree. I can definitely tell the transition. It is a slight shudder. While they have addressed the noise with the microphones the slight shudder is there. Not a big deal but it is not seamless from my experience.
01-21-2013, 07:36 PM
#12
AudiWorld Senior Member
I wonder if there are slight differences between some cars (faulty active motor mount, dead microphone)? I really can't tell the transition occurs, unless I check the mileage graph.
01-22-2013, 05:53 AM
#13
I think there are a couple of considerations. First, the transition from 8 to 4 to 8 is a big deal and causes many problems as other companies found out. The use of microphones and active motor mounts are bandaids to mask the transition and the reality of the mechanical challenges these transiitons bring. Audi has it figured out pretty well. However,the slight shudder I feel is the seat of the pants, performance transition that the speakers and motor mounts cannot isolate. This is what I feel. Second, I have only had the car for a short period of time, so I am feeling everything for the first time. If you have had your S7 for a longer time, these initial observations are probably long gone. The bottom line is that if I did not know that it was going from 8 to 4 to 8, I would probably attribute the slight performance shudder as an anomoly. Again, it is really not a problem, just that the transition does have consequences. As an aside, the marketing brochures also say there is no turbo lag. Regardless of what they say, there is....it is a bi turbo after all. Again, just the realities of technology. Bottom line: I love this car.
01-22-2013, 06:56 AM
#14
AudiWorld Senior Member
I've had my S6 for a few weeks and have only driven about 430 miles. However, I'm driving on studded winter tires, which impart some NVH of their own, so my seat-of-the-pants may be suffering from sensory overload. I will be able to tell definitively in the springtime.
As for "turbo lag": This engine doesn't experience delayed boost onset in the sense that the 930 Turbo did (i.e. nothing, nothing, nothing, Holy $#!^), but any rotating assembly has inertia and requires a finite amount of time to get up to speed. Take it on faith that, compared to a naturally-aspirated variant, this engine has more torque everywhere - even off idle. Boost, and thus relative torque, increases over time, which makes the low-end feel comparatively weak, but it's an illusion. I actually like the "elastic" feel of a well-sorted turbo.
As for "turbo lag": This engine doesn't experience delayed boost onset in the sense that the 930 Turbo did (i.e. nothing, nothing, nothing, Holy $#!^), but any rotating assembly has inertia and requires a finite amount of time to get up to speed. Take it on faith that, compared to a naturally-aspirated variant, this engine has more torque everywhere - even off idle. Boost, and thus relative torque, increases over time, which makes the low-end feel comparatively weak, but it's an illusion. I actually like the "elastic" feel of a well-sorted turbo.
01-22-2013, 07:14 AM
#15
I've had my S6 for a few weeks and have only driven about 430 miles. However, I'm driving on studded winter tires, which impart some NVH of their own, so my seat-of-the-pants may be suffering from sensory overload. I will be able to tell definitively in the springtime.
As for "turbo lag": This engine doesn't experience delayed boost onset in the sense that the 930 Turbo did (i.e. nothing, nothing, nothing, Holy $#!^), but any rotating assembly has inertia and requires a finite amount of time to get up to speed. Take it on faith that, compared to a naturally-aspirated variant, this engine has more torque everywhere - even off idle. Boost, and thus relative torque, increases over time, which makes the low-end feel comparatively weak, but it's an illusion. I actually like the "elastic" feel of a well-sorted turbo.
As for "turbo lag": This engine doesn't experience delayed boost onset in the sense that the 930 Turbo did (i.e. nothing, nothing, nothing, Holy $#!^), but any rotating assembly has inertia and requires a finite amount of time to get up to speed. Take it on faith that, compared to a naturally-aspirated variant, this engine has more torque everywhere - even off idle. Boost, and thus relative torque, increases over time, which makes the low-end feel comparatively weak, but it's an illusion. I actually like the "elastic" feel of a well-sorted turbo.
03-06-2013, 01:23 PM
#16
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03-20-2013, 10:49 AM
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03-21-2013, 12:10 PM
#19
AudiWorld Super User
As previously noted, the U.S. 2013 C7 A6/A7 (and all regions for that matter) have Stop/Start. Euro Audis have had it for some time. Since it can be defeated by the simple push of a button, it's no big deal and, unlike in Europe apparently, U.S. cars remember the last setting so it's not intrusive if you don't like it - push the dash S/S button one time to turn it off and it's like it was never there.
03-21-2013, 12:15 PM
#20
AudiWorld Member
As previously noted, the U.S. 2013 C7 A6/A7 (and all regions for that matter) have Stop/Start. Euro Audis have had it for some time. Since it can be defeated by the simple push of a button, it's no big deal and, unlike in Europe apparently, U.S. cars remember the last setting so it's not intrusive if you don't like it - push the dash S/S button one time to turn it off and it's like it was never there.
No start/stop on our cars