ToyotaToyotaJapan, 1937 > present155 models
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has announced a concept for the Frankfurt Motor Show that it calls the Hybrid-R. It says that the car will bring track technology to the road, and that is about all we know at the moment. However, there is a good possibility that this is the sports car that Toyota has been developing with BMWBMWGermany, 1918 > present87 models
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. 

Toyota's announcement of the car covers just two lines: "At the forthcoming 2013 Frankfurt Motor Show, Toyota will present an exciting new concept that brings Toyota Hybrid System-Racing technology to the road (and track)."

BMW and Toyota announced a partnership on hybrid technology on June 29, 2012. Part of the deal was that the two companies would development the architecture and components for a future sports car. Since that time, we have heard rumors that Toyota may position this new car as a spiritual successor to the SupraToyota Supra Gen.4Japan, 1993 > 20029 versions
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. 

The other possibility is that Toyota may be bringing a street-tuned version of its ultra capacitor-based hybrid system from the TS030Toyota TS030 HYBRIDJapan, 2012 > present5 photos
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to the road. At the moment, the Lamborghini Aventador'sLamborghini Aventador LP ...Italy, 2011 > present55 photos
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start-stop system is the only production car in the world to offer an ultra capacitor-based hybrid system. 

Ultra capacitors are perfect for sports cars. They are small, lightweight, have the power density of a battery and discharge quickly. Their downside is that, unlike a battery, ultra capacitors can only discharge completely. They provide all of their power at once. 

We wil know more about the car on September 10 at Toyota's press conference.