One of the big criticisms of the Fisker Karma is that the heavy beast isn't exactly efficient. A curb weight of 5,300 pounds is one reason why the EPA says, when running on premium gas, the Karma gets just 20 miles per gallon combined (and 20 city/21 hwy). When you throw electricity into the mix, the Karma is rated at 54 MPGe combined.
It's been a while since we've heard anything from AFS Trinity, the company that tried to make an impact a few years ago with a claim of "150 miles per gallon" equivalent plug-in hybrids (PHEV). After taking a bit of heat for that number, the company quieted down – disappearing from the LA Auto Show in 2008. The most recent news we heard from AFS was that it was thinking about building production versions of its Extreme Hybrid SUVs at a facility in Delaware. Looks like that plan is still
AFS Trinity SUV – Click above for high-res image gallery