And yet whereas the Prius produces 104g/km emissions, the Volt/Ampera produces 64g/km when running in EV mode from the UK grid. Whereas the Prius is always burning gas, I can do all my commuting and many other journeys completely on electric with the Ampera. I can (and will) charge it on solar. Whereas the Prius gets you from A to B, the Ampera does have the EV characteristics of torque and throttle response that makes driving fun.
This is proof of exactly why GM had to come up with the ER-EV moniker - to try to stop people lumping them together.
I find it funny that so many EV advocates like to dish out this statistic about
95% of journeys being under 25 miles and yet love to criticise the Voltec system for higher consumption and emissions vs. the HSD system over 250 miles.
Look at the holistic view. Over the lifetime of the car, I will be burning £23,000 / 3000 gallons less gas with the Ampera compared to a Prius.