The 2011 Prius is a rerun of the 2010 Toyota Prius. It retains its 50-plus mpg rating and innovative options such as a solar powered ventilation system. The 2011 Prius represents the third generation version of the world's most recognizable hybrid. Following a full redesign for model-year 2010, Prius is larger, more powerful, and more fuel efficient than the second generation 2004-2009 model. And it remains the world's best selling hybrid by far. Should you buy a 2011 Toyota Prius or wait for the 2012 Toyota Prius? Wait for the 2012 Prius if you're intrigued by the latest advance in gas electric science, the plug in hybrid. Plug in capability extends a hybrid's electric only range by tapping a power outlet for a portion of the battery charge. The 2011 Chevrolet Volt is the first to market, and Toyota is preparing to introduce a plug in version of the Prius during model year 2012. Cost, range, and mileage advantages over a conventional Prius are unknown. Today's Prius technology is arguably the most advanced of its kind in the world, and if that's enough for you, no need to wait for the 2012 model. The car's core values of fuel economy and high tech wrapped in a futuristic four door hatchback body won't change for model year 2012.