Automakers are betting on a different kind of electric car. Meet the EREV.

The big new "it" engine is an EREV. Will it outperform the PHEV? Scout Motors/Hyundai Motors/Business Insider New EREVs are coming to the market. They're a new generation of electric vehicles that come with an onboard gas generator. EREVs get EV performance and gas-car range — but will customers…