Mercury. Same as Crown Vic, I gather you have never driven one at 80? It’s comfortable, quiet and quite fuel efficient. The volt with its gas engine running full time at that speed will be comparable. Perhaps your laws of physics are different from those in the real world?
Perhaps you will take the time to show me where you think my laws of physics are incorrect instead of popping off on a subject you have no background in.
The Volt in real world use gets 33 at 78 mph. The GM gets how much? Low 20's?