Let's see:
2011-2012 Volt. Will serve over 50% of US commuters on pure EV power. 40mpg EPA hwy in CS. $13,000 avg in SoCal (- $450 for Southern California Edison customers).
2011-2012 Prius. 46 mpg EPA hwy. $13,000 avg in SoCal.
So unless you drive over 275 miles a day to work and back, the Volt is the Greener Choice. 276 miles is gives the Prius a 4 tablespoon
[email protected] advantage. Well, unless you can charge at work, then it's 550 miles a day commuting to break even.
The Volt has good reliability. Probably because the generator is not used much.
So for most folk, a Volt will be nearly pure EV in operation. There are a rare few who would see an advantage by opting for a "6-7 year old econobox", but you'd probably slash your wrists before too long.