Bobolouie

Does the RS7 go into "economy "mode with cylinder deactivation at low speeds/RPM's like the A7/S7 models? I cannot see that this happens looking at the economy gauge in the center console
Just curious

wordsworth03

Mine does all the time, especially if I am going a constant speed on the freeway. When the gauge turns green, that means it has deactivated.

Bobolouie

so - I was looking at the screen that has the equipment that takes away from "economy" - found the other screen that shows the green bar that changes.
Question - when in cylinder deactivation mode, can you feel a little "lugging" vibration or noise from the engine/transmission, or is it seemless ?

the_duke

I don't have an RS7 but the drive train in my A8 is virtually identical. I can't tell at all when it switches from 8 to 4 cylinders or when it switches back.

19hole

I can't feel it in my S7 either. If you didn't know better, you would think it wasn't even there.

Glisse

Only if the system determines a relatively constant speed pattern - low speeds in urban environment with frequent turns, stops, etc would prevent deactivation. The reason is that deactivation/activation uses additional fuel, so if the system is constantly cycling it becomes self-defeating:

wordsworth03

I feel mine all the time though it is subtle. My wife also tells me I am overly sensitive to noises and vibrations though.