Though the 2006 Suzuki Grand Vitara offers a 2.7-liter V6 engine that outmatches its base trim competitors in horsepower and torque, traversing hills and making quick moves can illicit an unbecoming engine whine and hesitation. It’s likely due to a torque curve that peaks at least 500 revolutions per minute higher than the competition, making the Grand Vitara seem a bit sluggish.