While Ferrari, Porsche, and others tinker with hybridization of their supercars, Lamborghini is betting the bull farm on extreme weight reduction to meet its target of a 35-percent CO2 reduction by 2015, as the name of its latest concept car -- Sesto Elemento -- suggests. That translates to "sixth element," which periodic-table enthusiasts will recognize as C, or carbon. Practically everything but its V-10 all-wheel-drivetrain (swapped in unchanged from a Gallardo LP570-4 Superleggera), tires, and fasteners is made of the stuff. Weight is conservatively estimated at 2200 pounds -- that undercuts its "super-light" drivetrain donor by about 750 pounds for an impressive weight-to-power ratio of 3.9 pounds per horsepower. Lamborghini's computers predict 0-to-62 mph acceleration in 2.5 seconds!

Lamborghini Sesto Elemento Concept First Look - Motor Trend

Lamborghini Sesto Elemento Concept First Look - Motor Trend

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