Audi recently unveiled their much awaited full-size sedan, the A8. On its launch, Audi introduced a range of new engines including a hybrid version. However, some Audi fans are already waiting for the A8's more powerful and faster sibling, the S8.

The outgoing S8 was powered by a 4.0-liter bi-turbo V8. The upcoming S8 and S8 Plus will continue to soldier on with a 4.0-liter bi-turbo V8, but with a twist. Instead of using an Audi powerplant, the all-new sporty full-size sedan is reportedly slated to use a Porsche powerplant. Specifically, the 4.0-liter bi-turbo V8 used on the latest Porsche Panamera.

According to Evo Magazine UK, the Panamera sourced 550 PS biturbo V8 will soon be finding its way into the upcoming Audi S8. Porsche initially developed the all-new engine specifically for the Panamera, which was launched last year. This power unit has now been made available to all other VW Group members. In fact, the new engine is also said to be featured in the new Bentley Continental GT.

In the Panamera Turbo, the 550 PS V8 launches the car from 0-100 km/h in a claimed 3.8 secods, and hits a top speed of 306 km/h. For the S8, it said to use a detuned version of this engine. Expect it to still output around the 500 to 530PS mark and enable the full-size sedan to go fast.

In case the S8 feels a bit low on power, one can opt for the range topper S8 Plus model. Evo also says that a name change could soon be in order, and S8 Plus could become the S8 E-Tron model, denoting its plug-in hybrid arrangement. Hardware will likely be borrowed from the Panamera Turbo S E-Hybrid, which outputs 690 PS.

Expect the S8 to arrive first after sometime in 2018, with the S8 Plus/E-Tron to follow suit soon after.

Source: Evo Magazine UK