As far as horsepower and torque go the gcv190 (old model) has 5.1HP and 8.3 ft-lbs torque. The GCV170 (new Model) has 4.8HP and 8.2 ft-lbs torque. I would say the GCV 170 is comparable to the "larger" GCV190 as the torque rating is what you want to look at to keep it from bogging down in tall...