audi allroad or a4 quattro

hello, I presently drive a bmw 540i I am interested in an audi allroad, or an a4 quattro, but NOT the 1.8t... maybe the 3.0 - what is best?
what I want to know, what to be aware of... the allroad has 2 turbos, air
suspension... is this a bad used car to buy?
insight is welcomed, thanks!
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That is an odd pair of alternatives to choose between as they are different sized cars. Maybe you meant to choose between the allroad and the A6 Avant Quatro as those are built on the same size of chassis and are similar in size to the BMW 5xx and Mercedes E Series.
All I can say on the topic is that I like my allroad (which I chose because I do need to regularly use it off-road), but I don't know anything about possible risks of getting a used one.
Tony
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Generally speaking, the more gadgetry there is, the greater the probability that something will go wrong.
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What's best depends as much on the user as on the car. they're different cars designed to suit different users. Do you have any particular reason for wanting the Allroad? If not, why go for it rather than a 'normal' car? Personally, I don't see the point of the Allroad. But I'm sure that others think it's the bee's knees.
I recently (April) went from a BMW 323i (E36) to a three year old A4 3.0 quattro Sport... and don't regret the move at all. The Audi has plenty of power for me and is far more comfortable to drive (the seats are much better designed, as are the ergonomics). I'm not saying that I find the Audi better or worse than the BMW overall, but it is a very different car. For goodness' sake test drive the Audi before you buy it. You might be surprised at how different it feels, and possibly not like the difference.
Another poster has pointed out, quite reasonably, that the A6 is a closer equivalent to your present 5-series than the A4. However, although this looks correct on paper, I found that the change from a 3-series to a nominally equivalent A4 gave me what seemed a significantly larger car. It's definitely more spacious in both the cabin and the boot than the 3-series. (I assume that this is a consequence of having a V6 instead of the longer straight 6 in front.)
Peter.
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