Lamborghini Aventador Roadster spied

Lamborghini has been spotted testing a prototype version of the epic Lamborghini Aventador Roadster in heavy winter conditions.
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A drop-top version of Lamborghini's new most powerful V12 production car has been speculated for a while now, but here we have proof such a model will exist.

At first, this prototype looks like an ordinary Aventador coupe. Our keen spy photographers have managed to capture the hardtop roof design, showing a clear connection line for the roof to come off. It is believed the detachable roof will be made from carbon fibre.

There doesn't appear to be any other major changes externally, with the pop-up intake vents still located on the rear haunches, and the aggressive intakes still residing behind the doors and side windows.

Like the cracking coupe version, the Aventador Roadster is expected to come with the same, all-new 6.5-litre V12 engine producing 515kW and 690Nm. The engine is matched to an independent shifting rod sequential transmission, helping the hypercar go from 0-100km/h in just 2.9 seconds. Top speed is rated at 350km/h.

Lamborghini still hasn't officially announced the Roadster version, so a release date could be some time yet. International speculation points to a possible late-2012 unveiling.