Audi e-tron Spyder

Audi keeps on growing its e-tron family. The automaker pulled a fast one by unveiling yet another electrified monster at the 2010 Paris Motor Show, only this time, the low-slung hybrid came sans-top. The concept is powered by two electric motors and a 300-horsepower twin-turbo TDI V6 that comes to the fight with 479 pound-feet of torque. Audi says that despite the hefty 9.1 kilowatt-hour battery mounted up front, it managed to keep the weight low and distribute the pounds evenly across the chassis. As a result, this e-tron should be plenty flingable if it ever makes it off of the stage and onto a public road.

Audi says the e-tron Spyder hits the scales at 3,196 pounds and that the drivetrain can be driver-controlled to operate on electric power only at speeds up to 37 mph for a total of 31 miles. The manufacturer says that in city driving, the capability is more than enough to hang with traffic. If not, there's always that juicy diesel V6 to play with.