I can second the Strider 4. We were looking online at the Adiva and got the measurements and realised that it would be a bit too long for our car, so we checked out the strider, which fits perfectly. DH loves that he can remove the wheels to create a little extra space in our boot too.
We didnt bother with the bassinet for it. DS was a winter bub, so we got the foot muff instead. I love how it folds up easily, and have no problems lifting it into the back of our 4wd. Laranna is right, once you know which button to press and how to fold it is easy as.
It's nice and easy to move around while pushing it as well.