Audi S6 and Audi S7 Sportback - cylinder on demand technology

A groundbreaking technology in the new 4.0 TFSI is the cylinder on demand system. It activates during low to mid-range engine loads. Depending on engine speed, its upper limit ranges from about 25 to 35 percent of maximum torque, about 160 to 250 Nm (118.01 to 184.39 lb-ft). Engine speed must be between 960 and 3,500 rpm, the coolant temperature must be above 30 degrees Celsius (86.00° F) and the transmission's third gear or higher must be engaged