NEWS  22.06.2010 | First Drive: 2011 Jeep Grand Cherokee Chrysler finally enters the 21st Century with its Pentastar V-6, which makes its debut on the 2011 Jeep Grand Cherokee. The 60-degree Pentastar replaces the 90-degree 3.7-liter V-6 in the '10 Grand Cherokee. The '10 Grand Cherokee is rated 16 mpg city, 21 mpg highway in rear-wheel-drive form, compared with 16 mpg city and 23 mpg highway for the RWD '11 Grand Cherokee with the 3.6-liter Pentastar.  Read the full story on Motortrend.com  View full photo gallery on Motortrend.com