Have you considered the
Toyota MGR? It weighs ~100lb and puts out 68hp. That's 50 somethings in metric.
It would replace the transaxle and maybe half the batteries could go where the engine is.
I have one, but there are SUVs coming to market in 2017 that have a rear axle with twin motors and an electric differential, which enables torque vectoring. I'm no longer a fan of open differentials, since that incident on the black ice.
The good news about the Toyota part is that Paul M. Holmes'
open source controller is characterized to work with it. It's called Open Revolt, so you can drive around with that in big letters in the back window.
