Fuel efficiency tech
The Toyota Prius (and its Hybrid Synergy Drive) is usually the first thing that comes to mind for when you think "fuel efficient." However, it's not the end-all green drivetrain technologies.
Diesels and turbodiesels get great highway fuel economy. Direct injection and turbocharging technologies help gasoline engines to be both more powerful and more efficient. Start-stop technologies, regenerative braking, and good old-fashioned lightweight construction help all sorts of vehicle types to be as efficient as they can be.
January 31, 2011 1:25 PM PST
Photo by: Corinne Schulze/CNET
| Caption by: Antuan Goodwin
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