Fire up the rumormill again. We've been bringing rumors about Audi working a "baby R8" known as the R4. Now here's where it gets tricky...

We know Volkswagen wants to share the BlueSport concept with premium brands Audi and new cousin Porsche. We've heard that the R4 will likely share many pieces with the next Porsche Boxster. Also we there are rumors going around that if Porsche gets in bed with the VW BlueSport chassis, it will be the basis for either a 914 revival or the next generation Boxster (which will get a four-cylinder engine).

So here's one possible scenario for the R4's birth: It's based on the BlueSport, which will also be the basis for the next-generation Boxster. This rumor is still a little thin, so don't bother trying to chart this one just yet.

If the R4 does see the light of day, it will likely be offered with two seats in both coupe and roadster versions. It could use a version of the 2.0-liter turbo four cylinder engine, that is also rumored for the Volkswagen R20. In the top-of-the-line application, it may make as much as 300 hp. Pricing would likely be in-line with Audi's social standing and would be in between anything that VW and Porsche would offer.

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