To help visualize just HOW bad the donuts were compared to the RE92's (which henceforth shall be known as the Tires Of The Gods), a photo with the car at actual starting & stopping points:
I used a big parking lot that's empty on weekends. The starting "hill" isn't huge - maybe a couple of feet elevation change where the entrance/exit goes up to meet the road grade.
But it was enough of a slope that the car rolled ...
- 216.9 feet on the RE92's @ 51 psi (average of 5 runs).
- 155 feet on the donuts @ 70 psi (average of 2 runs).
- just 138.8 feet (!!) on the donuts @ 51 psi (average of 3 runs).