Hybrid technology propels most fuel-efficient vehicles currently on sale in the U.S., but with costly battery packs and not-so-easy-on-the-wallet pricing; Are gas-electric hybrids long for this world? Could pneumatic hybrids be a cost-effective replacement?
Equipped with Urea injection and regenerative braking, the 2010 Audi Q7 3.0 TDI can return up to 26.4 MPG. Not bad for a 7-seat SUV. The new LEDs look good too. Here's our live gallery.
Was ist das? A non-hybrid with a regenerative braking system. Yes, BMW's latest 5-Series sports an intelligent alternator that uses energy collected during braking to charge the battery. Not your regular Die Hard, this battery is a quick-charge glass mat, a new construction using saturated absorbent glass (boron…