Daily commute got you down? You'll soon be able to do it in a Porsche by the end of the year without burning a drop of gas, thanks to a new plug-in Panamera S E-Hybrid model. The powertrain, which we saw earlier on a concept car, combines a V6 bi-turbo gas engine with a 95 horsepower electric model for 416 total system horsepower. Like recent offerings from Ford and others, the 2014 model adds a much larger 9.4 kWh battery
