Built on a modified Jeep Liberty platform, the Dodge Nitro Concept has the Liberty’s 210-horsepower, 3.7-liter V6 under the hood. It’s also got true off-roading capability, a full-time 4WD system, 20-inch wheels and tires, and a curb weight of more than 4,000 pounds. That means acceleration to 60 mph takes almost 10 seconds and fuel economy isn’t likely to impress much.