I took a look at the F4R engine and from the looks it'll be a tight squeeze. But the main factor is how can we locate a F4R in the States and the emission (state inspection) tests is another concern.I'm going to go out on a limb but if I was to do an engine swap in my Versa I would want to go with the F4R that come in our sister car the Renault Clio RenaultSport. it is a 2.0L engine that delivers 197hp. I think that would be the way to go.
If you managed to get an engine and get it into the Versa you have to keep us posted.My idea is to call my friends in France and try to import one and see how much the cost would be.
I'm also a member of the Renault Owners Club of North America so I have some contacts. I will leave a message there and see what they think of the likelihood of being able to import the engine.