You won't know until you try it. Ask the shop assistant to come with you to your car and try it in your boot - Baby Kingdom were happy to do it with us so you shouldn't have an issue.

We have a tiny car, a Mini Cooper, and we manage to fit a Quinny Buzz in there. We did have to put the bassinet on the back seat when we were using that but it was only for 12 weeks so we just lived with it. We have the capsule that fits on the Buzz frame and its so convenient, especially for times when we don't have room for the pram seat in the boot. We just take the chassis and snap the capsule on and go.

ETA: I've just remembered you have to allow for your car seats tether strap so where the points are on your car will make a difference to how much boot space you have. We don't use an Aus tethered seat so its not an issue for us (there isn't one that fits in the Mini so we have a European ISOFIX seat which our insurance has approved).