Comment Re:Coal power cars make little sense (Score 2) 257
Its misleading to specify torque at zero rpm, your power is zero because there is no movement.
What does movement have to do with anything? Do you even know what torque is? Here, let me help you with that. In a nutshell, it's force. There's all kinds of forces in the world that don't result in movement. Lucky for you. You're sitting in a chair, aren't you? Demonstrating an instance of force without movement all by yourself. Amazing, isn't it. Forces get applied before movement starts.
All of the above cars you mention can beat the tesla in some or many of what people would call performance specifications, such as acceleration...
Tesla P85D 0-60 mph 3.2 s
Audi S8 0-60 mph 3.9 s
Yes, the sports cars can beat it. It's a SEDAN. A five door liftback sedan. For crying out loud... And for the record, the curb weight of the Audi is 4685 lbs. The curb weight of the Model S is 4647 lbs. The Model S is lighter than the gasoline car in the same class and price bracket.
Efficency isn't hard to see - in the case of pollution its co2/distance. coal power to charge your battery isn't going to be any better for the environment than economy fossil fuel cars. Its not my opinion, a simple google search would show you this if you took off your fanbois goggles.
Really? Truly? Sorry, those links are probably too hard for you. They require you to calculate the efficiencies yourself by dividing. Here, let me help you.
2012 Coal 33.8%
2012 Internal Combustion 32.8%
Coal is more efficient. Not a lot, but it is. It's definitely not radically worse, or even slightly worse. So shifting from petroleum to coal for transportation is a gain, made better by the fact below about the efficiency of electric motors in transportation applications.
Also you are highly misinformed with electric motors, they are often 80-95% efficient when very lightly loaded and are near 50% efficient at peak power at half the no load speed - these are basic facts even a high school student should know.
Really? I guess you haven't made it to high school yet. I'll just describe the graph for those who won't follow the link. At 10% load the tested 25 horse power premium efficiency motor hits 80% efficiency. At 40% load, it hits 97% efficiency and it never drops below that, all the way out to 160% of its rated load.
and yes 10, 20, 30, 40 years from now we will replace our industrial electrical power production with better sources, but cars last 10 years at best. So right now the wrong thing to do is buy electric if you care about pollution.
My infernal combustion car is 14 years old, thanks. Right now, if you care about pollution, and can afford the gasoline-competitive electric cars (either of them), you can also afford to cover your roof in solar panels from one end to the other. I can't, just yet, but someday I will. At which point I won't care what "industrial power production" is doing.
Then again I don't suppose facts are your thing.
I replied with links. With numbers. You didn't. You should stop typing now.