The 4.0 TFSI engine in the Audi S8 plus
Audi engineers have improved the 4.0 TFSI engine again for the S8 plus. The sonorous V8 biturbo unit now manages 605hp and delivers a maximum torque of 700 Nm, and with overboost temporarily even up to 750 Nm. With the 63 kW increase in output compared to the S8, it accelerates from 0 to 100 km/h in 3.8 seconds. The electronically regulated top speed of 280 km/h can be optionally extended to 305 km/h.
Audi and quattro GmbH achieved these top levels with their combined expertise in engine development. The measures for the 4.0 TFSI range from the specific engine control with speed and boost pressure increase, through the modified exhaust valves, all the way to optimizing the internal geometry of the turbocharger for efficiency.