D3 A8 4.2 TDI vs BMW 635d?

[ian_uk1975]

Anyone driven both and care to comment on how they compare? If I get an A8, I want adaptive cruise. On the LCI-on (2007+) 6-series, the active cruise works all the way down to 0mph, so can be used in stop/start traffic, whereas the D3 A8 only works down to ~20mph.

Any comments on adaptive cruise would also be interesting.

Thanks.

[MrTickle]

I use adaptive cruise in the S8 quite a lot. Great system.

Never even considered using it in stop/start traffic, so the 20 mph thing doesn't bother me.

[MrTickle]

Not sure it works as an equivalent comparison for you but I have owned a few S8s and an M6 (all V10).

They were very very different cars. Quite a clear distinction between a rapid luxo barge and a grand cruiser.

[ian_uk1975]

Thanks for that. On the AAC, I believe it can apply up to 40% brake effort... I'm not sure how that translates to the real world, but have you ever been following on the motorway with AAC on and had the driver in front slam his brakes on? How does the AAC react?

[MrTickle]

The braking seems to be reasonably firm when, for example, a car pulls out in front of you. If there was an emergency stop situation, I would naturally slam the anchors on myself anyway - you would have to have a lot of confidence to leave it up to the car!

[MrTickle]

Here you go....

file:///C:/Users/jon_000/Downloads/SSP%20289_Adapt...

[Dr G]

Adaptive Cruise (Audi) comes with what is called 'braking guard' - the car will yell at you if the gap in front is closing to quickly and emergency brake if neccesary.

[ian_uk1975]

MrTickle said:

Here you go....

file:///C:/Users/jon_000/Downloads/SSP%20289_Adapt...

That didn't seem to work

[ManOpener]

ian_uk1975 said:

MrTickle said:

Here you go....

file:///C:/Users/jon_000/Downloads/SSP%20289_Adapt...

That didn't seem to work

That's because it refers to the file location on his computer.

Try this

[ian_uk1975]

Thanks, that was in German but I found an English translation elsewhere.

Interesting the max brake effort is less than I thought (25%). Not sure what the BMW system is like, but I believe Distronic Plus in the Mercs can use up to 100%.

[MrTickle]

ian_uk1975 said:

That didn't seem to work

Oops, sorry - that is indeed the link to the file post download - but glad you found it OK