The anatomy of acceleration.
You take a deep breath. Step on the accelerator. You´re pressed firmly into your seat. Experience butterflies in your stomach. Or in short: you accelerate from 0 to 60 mph in 3.2 seconds. In a luxury sedan. In a four-seater sports car. In the new
You now set the mode switch to SPORT PLUS. With this action, the 4.0-liter twin-turbo V8 engine springs to life, making its presence felt by means of a low murmur.
Launch Control can only be activated in SPORT PLUS mode. A function that ensures maximum acceleration from a standing start. Enables a real racing start. On every
The twin-turbo V8 engine gets ready to deliver its maximum output. Accelerates up to 5,000 rpm and begins to vibrate. Its full power at the ready. A real work of art that uses all its energy to maintain this high rpm at a constant level. At the same time, the engine harnesses the manifold pressure and forces it past the engine intake duct. It can therefore apply the full cylinder charge immediately the car moves off, so as to deliver maximum power within a fraction of a second. In the same instant, the transmission presses against the clutch plates ever so slightly. Both the power units – electric motor and combustion engine – provide torque to the clutch. So the
But the sports car is still stationary. You put your left foot on the brake. Place both hands firmly on the steering wheel. The suspension is firmly tuned. The 14kWh lithium-ion battery prepares to supply maximum current. The cooling systems get ready to provide maximum cooling capacity.
The hang-on clutch of the all-wheel drive and electronically-controlled rear differential lock of
"Launch Control active". Not a second has passed since the accelerator was first depressed, in order to activate Launch Control and prime the systems. The
The electric motor immediately provides maximum torque, propelling the vehicle forward and thereby bridging the gap that the turbo engine requires to reach maximum torque. Less than 200 milliseconds. Both respond to the clutch. Endeavoring to transfer all their power to the drivetrain and deliver it to the road via the wheels. The clutch attempts to suppress the two power units. To prevent the wheels from spinning during start-up, the clutch regulates the torque, so as to attain the ideal wheel slippage.
15 to 20 percent wheel slippage should be achieved, because this is when the tires have most traction. Not easy to do: the 8-speed
The electric motor and combustion engine now fully discharge their combined power. An overall torque of 626 lb. ft. 680 hp. Sheer power. In first gear, this rises steeply towards the speed threshold. Up to 6,800 rpm.
You now shift into second gear. The new 8-speed
Meanwhile, the car continues to accelerate. Inexorably towards 6,800 rpm. But the engine ignores the threshold, trusting the transmission. Remains at maximum torque, which it wouldn't normally do. It knows that the transmission will pull it down to the target second gear speed of 5,000 rpm when Launch Control is active. It sucks in air. Expels air. The electric motor also delivers maximum torque. The clutch makes every effort to respond. And manages to close. 400 milliseconds – and the speed drops. The result: no interruption in the flow of power. No loss of speed. On the contrary, the car receives an additional 0.5g of forward thrust.
The combustion engine and electric motor both work flat out at all times. Aim to produce maximum torque. And therefore achieve a perfect balance. Sometimes the combustion engine works harder, sometimes the electric motor. During the entire acceleration process, both deliver maximum power. Always. Even during gearshifts. Optimized for maximum performance by PDK.
The speedometer reads 52 mph. You again shift up a gear, moving into third. Just before the speed threshold. Within a whisker of 6,800 rpm. This propels the
A great moment. And because it may have been over too soon, here's another overview of the main features of our protagonist:
Maximum system output: 680hp
4.0-liter twin-turbo V8 engine: 550hp
Electric motor: 136hp
From 0-60mph: 3.2 seconds
Top speed: 192mph