Nissan came on strong with their newly announced NVCC (Nissan vortex controlled combustion) prototype, 2-1 liter "clean" engine. But Honda has indicated they are ready to slap them with a patent infringement suit.

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Where was Nissan's rotary powered Sunny featured in last year's show as a production car potential? Rumor is Nissan will put an all new rotary powered coupe on sale by the first of the year and didn't want to blow their impact by revealing it at the show.