In the highly competitive segment of compact SUVs, the GMC Terrain attempts to stand out from the pack with a more rugged appearance, especially when you select the off-road oriented Terrain AT4. Similar to its mechanical twin, the Chevrolet Equinox, the only engine available under the hood is a turbocharged 1.5-litre four-cylinder rated at 170 horsepower and 203 pound-feet of torque. All-wheel drive is standard on all models.