Despite its tough name, the 2011 Dodge Nitro is surprisingly wimpy.Engine: standard engine is 3.7-liter, 210 horsepower V6; 4.0-liter, 260-horsepower V6 optional with Nitro SXTAcceleration: the standard Nitro has a current 0-60 time of 9.5 seconds, while the rear-wheel-drive 4.0-liter Nitro has a 0-60 time of 7.7 seconds. For 2011, Dodge may up the power of the Nitro, resulting in more