> By comparison a normal 200HP engine at 30% efficiency is producing 667kw of waste heat into the air
This isn't really a fair comparison. Cooling capacity goes up with the temperature difference to ambient. It's a lot harder to cool 8kw of heat at 20C above ambient compared to 8kw at 200C above ambient.
That is a meaningful difference but we are talking ~1/100th the heat transfer.
The majority of that heat is removed via the radiator which uses a liquid coolant which should not exceed 105C even when the outside temperature is 45C so that’s only 60C of wiggle room.
Though it’s a fair point batteries have lower maximum temperatures, at worst reducing charging rates when outside temperatures exceed ~(110C or 43C) is hardly deceptive or particularly relevant to most people. High end cars could even use the car’s AC in extreme situations.
This isn't really a fair comparison. Cooling capacity goes up with the temperature difference to ambient. It's a lot harder to cool 8kw of heat at 20C above ambient compared to 8kw at 200C above ambient.