How is the Chevy Volt different than today’s hybrids, like the Prius?
Today’s hybrids are called parallel hybrids. They use a small electric motor for low speed driving, but switch to a regular gas engine for acceleration and faster speed driving with the electric motor providing enhancement, hence both engines work side by side or in parallel. The Volt is a series vehicle meaning only the electric motor power the car at all times, the gas engine is just a generator, making electric to keep the batteries in a steady state of charge after 40 miles.