I wouldn't bother with a Q7 unless you *need* the 3rd row. Back to back between a Q7 and the '13 Touareg we decided on made the Q7 seem like a lumbering lump. Next to each other there wasn't even much difference in size and I expected major differences.
Actually, I didn't drive the Q7 but I explained to my wife that she had to because I didn't want to ever hear her say she wonders what it would have been like and it's the major reason I drug her along for our trip from SD to LV and back same day with the kids in the car
That was because we got our 2013 Exec down to $15,900. Based on that, I'd say the 2011 wasn't a hot deal but my deal has caught notice--even my lender said whoa wait the market value on that is $22K (and the check they were cutting for me) what happened?
Anyway, one of the techs made a face when I suggested my wife hop in the Q7. And when she drove off he described some negatives aspects between the two. I just listened since he's got an agenda to sell me a car, but at the same time the Q7 was older and had been on the lot longer so it was a strange play, imo, so I took it at face value. It was confirmed when my wife got back because the first thing she said when she got out was, "nope." So I don't know the exact differences but they were obvious to my wife and I wouldn't think she considers herself a discerning driver.
I just did a quick search when we decided to grab an Egg (pretty much happened over the weekend) but there is a significant difference between the engines' current power capabilities and also how much they can be opened up after tuning (the T3 is what I consider a massive increase in both). That probably had a lot to do with what they were both feeling in their pant seats since the Q7 was an older model (I think it was a 2011).
I'm not a fan of the interior of the older models. That Q7 could have been an 09, though, it was definitely dated inside.