2009 Frankfurt Auto Show: Lamborghini Reventon Roadster

How do you top the Lamborghini Reventon? The million-euro supercar – itself based on the already-extreme Murcielago – made its debut at the Frankfurt show two years ago, and almost immediately sold out its entire production run. This year Lamborghini returned with an even more enticing proposition: the Reventon Roadster.

The ultimate convertible Raging Bull upgrades on the Reventon coupe's fighter jet-inspired styling with an open-air body style, coupled to the same blueprinted 661hp 6.5-liter V12. Lamborghini will only make fewer than 20 examples, each carrying a $1.6 million price tag, so chances are these photos are the closest you'll ever get to seeing one.