Re: pentastar upgrade
From what I have read previously, the Pentastar and Hemis will be getting direct injection and a version of Fiat's MultiAir, giving them a 10% increase in hp and torque, along with a similar gain in fuel efficiency.
Personally, I like the old reliable port fuel injection. If the past experience of other manufacturers is an indicator, I would expect the first generation to have teething issues, some of which won't be apparent until they get up in mileage, like excessive carbon build up on valves.
I imagine the new engines will be great. A 400hp/425ftlbs 5.7l MultiAir Hemi with the fuel economy of the current Pentastar or a Pentastar with the fuel economy close to the diesel sounds awesome.