The idea was to create a car that stunned customers visually, provided impressive fuel economy, pure electric driving capability and some sports car handling on top. Basically, it was designed to be half sports car, half plug in hybrid. The BMW i8 is a good sports car, with good steering, good dynamics and good fun. But the Porsche 911 is a great sports car. Its steering is superb, chassis balance impeccable and raspy flat-six engine note intoxicating. It starts in pure electric mode, capable of driving around 15 miles under pure electricity.