Ever since Audi dropped the 4.2-liter V8 from the R8's engine lineup for the new generation, there's been a gap for people who wanted the automaker's latest supercar, but didn't want to pay such a steep price for the V10 model. We heard rumors last year about a replacement in the form of a twin-turbo V6, and now we have a clearer idea of what it'll be like.

We first learned from Autocar last year about Audi's plan to use the 2.9-liter V6 found in the new Panamera 4S, Audi RS4 Avant, and Audi RS5 to power its flagship supercar. Autocar now reports the engine could make over 500 horsepower and 500 lb.-ft. of torque in the R8.

The 2.9-liter V6 is a 90-degree unit based on the Volkswagen Group's new 4.0-liter twin-turbo V8 found in the Panamera Turbo. In its current most powerful form, the engine makes 450 horsepower and 442 lb.-ft. of torque in the RS4 and RS5.

If you're knowledgable on the current R8 lineup, you'll know the base V10—the cheapest trim currently available—makes 540 horsepower. Selling a twin-turbo V6 with a similar output could cannibalize sales, so it's possible Audi could drop that engine choice entirely and offer just the top-tier V10 Plus model for those seeking naturally aspirated performance. Then again, nothing's official yet, so we can't be sure.

We always expected the R8 to go forced-induction sooner or later, and it might not be a bad thing. The V6 engine is probably lighter than its V8 or V10 siblings, which means this rumored turbo R8 could be a real blast to throw around corners.

We'll just have to wait and see what Audi has to offer.

Here's a look at an older Audi R8.

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