The maximum drive power of a fully electric vehicle depends on prerequisites other than the maximum drive power of a vehicle with a combustion engine. In order to achieve the best possible comparability and reproducible results, Porsche determines the advertised drive power of its fully electric models in accordance with the specifications of UN Global Technical Regulation No. 21 (GTR21).

The measurement of performance is carried out using a sufficiently charged battery on a temperature-controlled test stand. Maximum power is applied for the duration specified in the standard, which is 2 to 10 seconds, depending on the measuring method.

The GTR21 does not include measurements from standing start. To determine the Launch Control power output, Porsche has therefore slightly modified the measuring method, accelerating the vehicle from a standing start to a reference speed with Launch Control activated. The measurement starts as soon as the vehicle accelerates under full load.

The drive power available in real-world driving conditions can be significantly below the values determined on the test stand. Important influencing factors include the duration of the power requirement, the speed range, the battery charging condition and the temperature of the battery and drives.