I found this fruit tree growing in a community garden and it looks oddly familiar although I can't quite pick it.
Definitely a tamarillo as stated in the comments.
No Passion Fruit. It is clearly a nightshade as you can tell by the fruit and leaves. Solanum spec. Maybe it is a kind of egg plant. http://www.prosisupermarket.com/admin/Product/White%20egg%20plant.jpg
It's granadine, or passion fruit. My mom had them in the garden in Mutare Zimbabwe.
We called them Tree tomatoes, used to enjoy eating them at Lilfordia estates those ones are not ripe yet