Originally Posted by HottRodW
I'm not sure where you found your data, but I encourage you to double check your numbers. BMW lists the X1's cargo capacity at 14.8 cu ft, which is well shy of the Impreza's capacity, and a fraction of the 34+ cu ft the Outback's offers. There is simply no denying the packaging advantages of FWD platforms.
With the back seats at the 2nd detent (i.e. upright), with the 1st being the reclined position, cargo capacity increases to ~25 cu ft. When the seats are in their reclined position, you are correct that it is ~ 14.8cu ft. When the seats are folded down, cargo capacity if furthered to the ~56cu ft. Not a complete apples/apples comparison, but 25cu ft is real without having to fold the rear seats down.
Also, the Outback is a larger vehicle. Perhaps my wording was off by not specifically calling that out, but that is what I meant when I said the X1 'is smaller but on par'. It is caveated by being smaller than the Outback.