4G, 2013–2018) Audi revealed the details of the RS 6 Avant on December 5, 2012. Its twin-turbo TFSI V8 engine develops at 5700-6600 rpm and of torque at 1750-5500 rpm. This will enable the RS 6 Avant to accelerate from 0 to in 3.9 seconds. The top speed is limited to by default. By adding the optional Dynamic or Dynamic Plus package, this top speed is increased to respectively or . Audi claims an average fuel consumption of and CO2 emissions of 223 g/km. In order to accomplish this, Audi has added a start-stop system and a cylinder on demand system. The RS 6 Avant is offered with an 8-speed tiptronic transmission. The C7 RS 6 was not offered in North America, however that market received RS 7 Sportback which shares the same powertrain and platform. C7 RS6 Performance The RS6 Avant Performance is powered by the same 4.0-litre TFSI twin-turbo V8 engine as the standard RS6, but with the help of a retuned ECU mapping, it increased power output to at 6100-6800 rpm and increased torque to at 2500-5500 rpm. While the top speed remains limited to , or with Dynamic Plus package, the 0 to time has been reduced to just 3.7 seconds at from 0 to in 12.1 seconds. Despite the improved performance, the fuel economy and CO2 are unchanged from the standard RS6 Avant. C8 (Typ 5G, 2019–present) As with the previous generation, the new RS6 is powered by a 4.0-litre twin-turbo TFSI petrol engine, now boosted by a 48V belt alternator/starter mild-hybrid system, which can recover up to . The engine also utilises a cylinder-on-demand system that can shut off half of its cylinders to boost fuel economy. The powertrain produces with available between 2100rpm and 4500rpm. The acceleration to takes 3.6 seconds and in 12 seconds. As standard, top speed is limited to , with a further two levels courtesy of optional packs – the Dynamic package allows , while the Dynamic package plus grants even more headroom for a maximum of . The C8 is the first RS 6 Avant to have the hybrid drivetrain, utilising a Riemen-Starter-Generator and a 48-volt electrical system. The Quattro system has power distribution with 40% for front and 60% for rear. The system can adjust the power distribution up to 70% for front and to 85% for the rear if needed. The adaptive suspension system is 20