The latest-generation Audi A6 will soon welcome a new addition to the family; the S6 Avant. Outfitted with a Porsche engine and a series of styling modifications, the car promises to be the ultimate family cruiser this side of an RS6.

Arguably of most importance for the S6 Avant will be its powertrain. Our sources indicate that the 2.9-liter twin-turbo V6 available in the Porsche Panamera will be the sole engine option for the S6. While this engine is more compact than the outgoing 4.0-liter V8, it will produce roughly 450 hp. That should be enough to rocket the car to 62 mph (100 km/h) in under 4 seconds.

This particular 2019 Audi S6 Avant prototype was scooped out and about during winter testing with camouflage across all of the exterior. However, once that camo is removed for the production model, customers should be satisfied by a healthy dose of aggression over run-of-the-mill A6 variants. With that in mind, key tweaks will include new bumpers front and rear, enlarged air intakes, larger wheels, big brakes, and a lowered ride height. Quad tailpipes will help to cap off the alterations.

Luxury and performance to meet in perfect harmony

The new S6 Avant will also have an interior dramatically different than the outgoing model. Audi’s MMI touch response operating system will be featured alongside a main infotainment screen measuring 10.1-inches and a second 8.6-inch display providing climate control functionality. In usual Audi fashion, the automaker will spruce up the cabin with new ‘S’ badges, a healthy dose of carbon fiber and, potentially, a new sports steering wheel.

When the 2019 Audi S6 Avant premieres towards the end of this year, it will act as the range-topping model in the A6 range. However, it won’t hold that place for long as an all-new RS6 Avant is also in the works.

Details about the new RS6 are scarce but it’s reportedly going to use the 671 hp plug-in hybrid powertrain of the Porsche Panamera Turbo S-Hybrid.

Photo credits: CarPix for CarScoops