That trip would be no problem in a Volt / i3, accept the i3 needs its 2 gallon tank replaced 'ala tempo. The Volt's second version has evolution in things like its exhaust manifold coolant jacket. Fast, hot coolant is what you want, and GM also dialed up the kw of the heater (which heats a smaller coolant loop, to heat the cabin). GM also switched the Volt to run on regular gas, 40 cents cheaper than diesel/premium and a smart move. Its 43 combined gas-only mpg's are right on top of the diesel, neglecting that the first 50+ are on battery. In New England, natural gas dominant electricity nets us some low emissions....but to get back on topic, no AWD.
Audi AWD Q7 PHEV, with Volt sized battery, costs 3 times a TDI as well. I was sure to check that puppy out, at the NYC auto-show. Given it is only VW Group's decision to do so, maybe the goings on will finally hasten its arrival. Actually, I'd almost give odds this will be news in the next few weeks/month.
http://insideevs.com/audi-releases-details-gas-version-q7-e-tron-phev/