Lamborghini has kept its promise to unveil a "new" model at every major auto show this year, and it's not stopping even though the show season has is pretty much wrapped up. Autocar has spied what's believed to be the Lamborghini Murcielago SV, a lightweight version of the Italian automaker's top model that will be sending its additional ponies to the rear wheels alone.

Based off the current range-topping LP640, the SV will putting out around 680 hp from its mid-mounted V12 and will tip the scales under 3,500 pounds. The weight savings will come from the abandonment of the front differential and drive shafts that would normally also power the front wheels, along with nixing the ICE stereo and the system that raises and lowers the rear spoiler. Naturally, plenty of carbon fiber is part of the equation, including the doors, smaller rear wing and other assorted parts.

There's no word on when the Murcielago SV will debut, but we've got a five-spot on the Paris Motor Show later this year.

[Source: Autocar]