Like any good performance car, Grimsel achieved the feat through a combination of the right engine technology and light weight. While its four wheel hub motors produce just 200HP, they also produce a whopping 1,254 foot-pounds of torque... and when the car's carbon fiber body weighs just 370 pounds, it's extremely easy to move. Per-wheel traction control helps translate that power effectively, too.
It's doubtful that you'll see this exact car in full-fledged competition. All the same, it bodes well for the future of electric motorsport. As quick as the cars in Formula E might be, Grimsel shows that there's still room for improvement.
This article by Jon Fingas originally ran on Engadget, the definitive guide to this connected life.