The 2009 Dodge Nitro is a compact SUV with attitude. Designed primarily for road use and cruising in style, the five-passenger Nitro is anything but ordinary. The base engine for the 2009 Nitro is a 3.7 liter 210 horsepower V6. An upgradable 4.0 liter 255 horsepower V6 engine is also available. Fuel economy for the Dodge Nitro ranges from 16 MPG city to 22 MPG highway.