I certainly don't see EVs as the holy grail, but neither are CVTs.
The big issue is that at peak efficiency the engine produces too much power to cruise at 100 km/h.
And 300 g/kWh average are rather optimistic unless you do a lot of pulse and glide with engine off coasting.
With a warmed up small engine, tall gearing and exclusively highway driving you might get there.
But that's a rather optimistic assumption.
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