The new 2019 Audi S6 Avant has been spotted once again, this time off the frozen track but wearing just as much camouflage as before. However, this prototype wears the top-of-the-line matrix LED headlights first seen on the sedan.

Just as we reported before, the S6 is rumoured to pack a lighter six-cylinder petrol engine, likely the 2.9 litre twin-turbo V6 to replace the older and heavier 4.0 litre V8. The same engine can be found in the B9 Audi RS4 and RS5, as well as the Porsche Panamera 4S. However, exactly what the smaller unit will output remains unknown, but expect it to at least match the V8’s 450 hp mark.

Audi’s tried and tested quattro all-wheel drive will be standard, though its unclear which type of gearbox – whether a torque converter auto or S tronic dual-clutch – will find its way here. Just to compare, the older S6 Avant made 450 hp and would do the 0-100 km/h sprint in 4.6 seconds (S6 sedan in 4.4 seconds).

For interior, the S6 should get the same high-tech cabin as the A6. That means the 12.3-inch virtual cockpit, head-up display and dual-screen layout in the centre dash will be standard, and it could also get additional sporty trimmings to match its speedy credentials. Audi’s suite of safety systems available on the A6 should also be carried over.

GALLERY: 2018 C8 Audi A6