The 2021 Porsche Taycan Turbo is an all-electric supercar that generates up to 680 hp. Electric motors combined with an innovative 2-speed automatic transmission accelerate the coupe to 100 km/h in just 3.2 seconds. The maximum speed is 260 km/h. The electric car itself is silent, but to create the feeling of driving a Porsche, the Taycan Turbo has a speaker under the front bumper. It makes a synthesized hum to alert the by-passers. This sound is compiled by the developers based on the actual noise of the electric motor. The pulsation is mixed, so the sound builds up in waves, like when shifting gears.