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Rumor has it that Audi may begin limiting use of their V10 engine that has been a favorite on the RS6, S6, and the S8. Instead, the company is planning the introduction of a new twin-turbo V8.

The reason for the change is the environment. Speculation is that Audi will be able to provide more power, while producing less emissions, with the new V8. Despite this, Audi still chose to introduce the latest R8 Spyder with a 5.2-liter, naturally-aspirated version of the V10. This unit produces 525 hp.

It could be the new Audi RS6 that first receives the new V8. With a twin-turbo 5.0-liter V10, the current-generation Audi RS6 goes 0-100 km/h in 4.5 seconds. The engine generates 580 horsepower and up to 479 ft-lb of torque.

On the previous RS6 (C5), Audi used a 4.2-liter twin-turbo V8 engine that produced 331 kW (450 PS; 444 bhp). If BMW is working on a new, 550 - 600 horsepower twin-turbo V8 for the next M5, Audi could be working on something equally strong for the sake of competition.

Gallery: Rumors: Audi RS6 V10 to be Replaced by Twin Turbo V8

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