German Autobahn, for those handful of sections without at least temprary speed limits. And on tracks, but let's be honest, vehicles like the Plaid, and similarly heavy vehicles, suck at tracks. Going fast in an almost straight line is easy.
I said heavy cars suck on a track. Why? Because they have a harder time cornering, consuke more energy, increase tire wear and brake performance degrades as well. That is a question of weight, and weight alone.
Also, and every racing series shows that, one fast lap doesn't guarantee good results in a race.
The autobahn where I have driven is quite straight. Track performance depends a lot on the tires, and weight can help with right turns due to friction enhancement. Also, tracks through mountains are where EVs shine.