            Source: The Detroit News  Comments     Threshold
By 91TTZ on 11/9/2012 6:22:11 PM , Rating: 2 Installing a more
powerful electric motor is more likely to decrease fuel economy.
The article didn't say "more efficient" electric motor.  Also,
giving it increased battery capacity shouldn't increase the MPG
that the car gets on gasoline.  By Philippine Mango on
11/10/2012 6:57:57 PM , Rating: 2 A more powerful electric motor
would allow the car to drive more often with the engine off.
They also could be asking for more powerful batteries and
electric motor to boost its hp ratings. While driving faster and
harder won't be good for fuel economy, if you're easy on the
car, then the larger electric motor will mean a more efficient
electric motor as well. I'm not really sure how Toyota expects
to achieve 60mpg but I guess that number is possible for city
fuel economy instead of highway fuel economy.