More on the 2nd generation Volt from CNN here http://money.cnn.com/2014/10/28/autos/volt-second-generation/index.html?iid=HP_LN I guess we still dont know what europe will be getting though..
"It would have been simple for us to tweak our existing battery to provide nominally increased range, but that's not what our customers want," said Nitz. "So our team created a new battery system that will exceed the performance expectations of most of our owners."
in the new car the two motors will operate together more of the time for improved performance. The new Volt will accelerate roughly 20% better, GM said.