Auto X asks the question:

"Is this (the BMW i8) a proper sports car?"

Its a fair question that the all premium plug-ins like i8, Porsche Panamera S e-Hybrid and Tesla Model S P85D face these days.

And we aren't talking about judging the sport car benchmark from an impromptu straight line drag race that breaks out somewhere against a gas supercar at a red light.

To be a proper sports car (whose full abilities can't really be tested legally on the open road) it needs to be taken to the track.

Given the BMW i8's custom built platform, and its incredibly light weight (1,485 kg/3,274) - especially for a plug-in, we have good feeling what the end verdict might be.