What engine is in 2016 Audi (C7 2015) A6 Allroad 3.0 TDI 218HP Quattro S-tronic 7 Speeds? The 2016 Audi (C7 2015) A6 Allroad 3.0 TDI 218HP Quattro S-tronic 7 Speeds has a V 6, Diesel engine with 2967 cm3 / 181.1 cu-in capacity. How many horsepower (hp) does a 2016 Audi (C7 2015) A6 Allroad 3.0 TDI 218HP Quattro S-tronic 7 Speeds have? 390 registered specifications for Audi A6 3.0 TDI V6 DPF quattro generation C7, S Tronic, 7-speed. Engine & Performance, Dimensions & Weight, Exterior, Interior, Features, Safety & Security and Other. Give feedback. What engine is in Audi (C7 2015) A6 3.0 TDI 218HP Quattro S-tronic 7 Speeds? The Audi (C7 2015) A6 3.0 TDI 218HP Quattro S-tronic 7 Speeds has a V 6, Diesel engine with 2967 cm3 / 181.1 cu-in capacity. How many horsepower (hp) does a 2014 Audi (C7 2015) A6 3.0 TDI 218HP Quattro S-tronic 7 Speeds have? hxHU.