Mercedes AMG recently set the first sub-8 minute production electric vehicle lap time around the Nurburgring with their SLS Electric Drive. Check out Chris Harris’s review for all the details on the car. This is the on-board footage of the lap. It’s interesting to note that the gauge on the right side is not a tachometer. The electric motors only have one gear so you can tell how fast their spinning based on the car’s speed displayed in the left gauge. The other gauge displays power output in what I’m guessing is percentage. 100% probably marks the maximum continuous output with the ability to burst above that for a little while. The power gauge also has a negative section going counter-clockwise from 9 o’clock to 6 o’clock to represent power recovered by regenerative braking. The regenerative portion of the gauge is definitely in a different scale because if they were getting 50% of the max output during regeneration it would make the car lurch a lot more than it is. You can also see that the regeneration gets maxed out when the driver lets off the “throttle” without hitting the brakes. The regeneration torque was probably set up to mimic engine braking torque of a combustion engine.
Source: tsport100 on YouTube