The already ludicrous Audi RS6 Avant has just become even more insane, courtesy of a tune from ABT Sportsline that takes the standard model's 4.0-liter turbocharged V8 from 552hp (560PS) and 516 lb-ft (700 Nm) to a stratospheric 720hp (730PS) and 920Nm (678 lb-ft) of peak torque for a top speed of 320km/h (199 mph). Read more »
