Enlarge / Wider than a normal 718 Cayman GT4, the ePerformance is also more powerful—and a lot more electric. Lap times are said to be comparable to the 992 GT3 Cup car. (credit: Porsche) Porsche is getting closer to putting a battery-electric sports car on sale. It's not quite there yet, but after showing off the Mission R concept in 2021, the company is now hard at work making sure the electric powertrain technology that the concept was supposed to showcase will stand up to the work expected of a Porsche sports car.