Torque on Demand is what I was referring to the amazing highway passing power. The difference is the smooth, consistent, and confident power delivery. HYBRID SYNERGY DRIVE: Torque on Demand Control HYBRID SYNERGY DRIVE: Uphill Power Assistance HYBRID SYNERGY DRIVE: Hill Start Control However, the above illustrations are compared to a manual labor transmission but it gets the same point across. Below is a quote from the Iconic Prius chief engineer, Masao Inoue. He explained the human body experience vs. the figure very well.