One of the major disadvantages of electric vehicles, for petrolheads at least, is the lack of engine noise. How can you be proud of your beastly motor if it doesn't roar? There are mundane considerations like pedestrian safety too, but that's beside the point. Nissan seems to have uncovered an old copy of Blade Runner in its toolshed and decided that, yes, it might be a good idea for the Leaf EV to emit a whooshing sound inspired by the Philip K. Dick adaptation. If implemented, this will raise the car's price somewhat, but wouldn't you pay a premium to have your auto sound like a jet taking off? The Leaf is expected to arrive in the US in 2010, replete with its reputed 367 miles per gallon efficiency.