HPerformance tunes the Audi RS6 Avant
There's no doubt that the Audi RS6 Avant is already a powerful model. Even so, HPerformance decided to improve the total output of the German wagon as it follows. The stock 4.0-liter V8 engine which normally delivers 560 hp and 700 Nm of torque is now capable to produce 700 hp and 860 Nm of torque. The extra power is...