Not as far as I know, I certainly couldn't get one in my A3 (although it does have a slightly small boot opening compared to the internal volume). A rack is something like 24" x 30" x 40-50", so even if it will go in the back, you can't get it through the boot door.
If you do use a tape measure, make sure you keep it vertical/horizontal at all times - don't be tempted to measure the boot opening directly, as the top/bottom lips are on a diagonal and that measurement is misleading, as I discovered.
You should get one in something like a Zafira or Scenic, I've had a 24x26x48" fish tank in a people carrier, with space to spare