Green wheels at the Philly auto show

Ford's new C-Max hybrid and C-Max Energi, a plug-in hybrid, are two of the green cars at the Philadelphia Auto Show, opening today at the Convention Center. 

If you're wondering how to sort out all the eco-alternatives. the American Council for an Energy Efficient Economy recently released its green vehicle ratings.

The Toyota Prius c, a compact version of the Prius, topped the list.

The high spots were dominated by hybrids, plug-in hybrids and all-electric vehicles. They included the original Prius (No. 3), the new plug-in Prius hybrid (No. 4), and the larger Prius V (No. 11).  

The Honda Fit electric vehicle is No. 2, and the Honda Civic Hybrid  is No. 5.

What?! No Tesla?! Turns out the cut-off was 1,000 retail sales.

The Nissan Leaf didn't make the list, either, but that's because it's fuel efficiency testing wasn't finished in time.

The Scion IQ and Smart ForTwo are the only non-hybrid, non-plug-in vehicles on the list.

"The vehicles at the top of this year's rankings are proof that automakers are really ramping up their offerings," said ACEEE lead vehicle analyst Shruti Vaidyanathan in a press release. "There are more hybrid and electric options on the market this year than ever before and the race for a spot on the Greenest list is increasingly competitive. Automakers have revamped their offerings to meet the growing demand for efficient vehicles and new fuel economy standards."