The Prius ICE is 1.5L and 78HP, just to give you an idea.

I don’t think you’re thinking it out all the way when you say that the ICE has to provide all of the power for the car. I mean…you’re correct in a sense, but what you don’t take into account is the fact that the ICE is in almost all situations able to produce more energy than is needed at the moment. It stores this extra energy – as well as that reclaimed via regenerative braking – in the battery for access as needed.

Basically, you would only be correct if the car were being driven in such a way that all available power were required for an extended period of time…..like if I were to try to drive 50 miles with the accelerator on the floor, or some such thing.

Please, we know that you know; that the only reason to have hydrogen vehicles as a preferred power system is to keep the American commuter tithed to the petroleum industry.
The billions of dollars that the petroleum industry has in vested in their delivery system, would go the way of the buggy whip if the auto industry chose to really provide the best product to the consumer. Why else would the petroleum industry be such an active player in keeping the Electric vehicle from becoming a viable product for the past 20 years.

My suggestion for the petroleum industry is to try to come up with an alternative use for their real estate, they should think, dry cleaning, coffee, and fast food.

We know!

In other words expect it to be a 150hp+ and 1.8L+ with at least 4 cylinders.  A smaller engine won’t be able to power the car and it’s accessories.

I just completed a 2,000 mile trip in my 2007 Aveo and it’s little 1.6 engine without VVT and using real world pen and paper data I consistently got 36 MPG with a/c on and cruising at 75 mph the whole way.   On certain legs without the a/c I hit 38-40 mpg.  

All that to say that don’t just bench race the specs.  Wait until we have some real data to go on to see what the car can do.