How did you figure 10 cubic feet.? The Audi Q7 is 10. US news has the XC90 as 15.4, quoted below with link. 15.4 is on par if not better than most other 3 row SUV's in this same size grouping (toyota highlander, honda pilot, CX9, acura MDX, audi Q7, etc...)
"The 2016 Volvo XC90 has 85.7 cubic...