The normal distribution of the tractive power is clearly biased toward the rear axle in accordance with the weight distribution of the e-tron Spyder and the dynamic shift in axle load during acceleration. Similar to with a pure mid-engine sports car, roughly 75 percent of the torque goes to the rear and 25 percent to the front. If an axle slips, this balance can be varied thanks to the central control of the entire drive system in combination with the ESP. The hybrid vehicle from Audi thus enjoys all of the advantages of quattro technology.
The combination of the mid-mounted TDI engine and the two electric motors at the front axle also make it possible to intelligently control the lateral dynamics of the e-tron.
Similar to what the sport differential does in conventional quattro vehicles, torque vectoring – the targeted acceleration of individual wheels – makes the e-tron Spyder even more dynamic while simultaneously enhancing driving safety. Understeer and oversteer can be corrected by not only targeted activation of the brakes, but also by precise increases in power lasting just a few milliseconds. The concept car remains extremely neutral even under great lateral acceleration and hustles through corners as if on the proverbial rails.
The chassis has triangular double wishbones at the front axle and a trapezoidal-link rear suspension made of forged aluminum components – a geometry that has proven in motorsports to be the optimal prerequisite for high agility, uncompromising precision and precisely defined self-steering behavior. A taut setup was chosen for the springs and shock absorbers, but it is still very comfortable.
The direct rack-and-pinion steering gives finely differentiated feedback. Its electromechanical steering boost varies with speed, so that the e-tron Spyder only has to provide energy while steering, and not while driving straight ahead.
As befitting its status, the Audi concept car rolls on 20-inch tires with a new blade design. 245/30 tires up front and 265/30 tires in the rear provide the necessary grip.