Tailored for driving
Q4 four-wheel drive
3.2 JTS V6 engined versions of the new Alfa 159 and Brera are equipped, as standard, with Alfa Romeo’s Q4 permanent four-wheel drive system. The advanced Q4 system employs three differentials, with a self-locking Torsen-C unit at the centre of the system which divides drive torque by a ratio of 57% to the rear wheels and 43% to the front in normal driving conditions.
The torque split between the front and rear axles is constantly modulated by the central differential on the basis of available grip, with a bias towards the rear axle promoting sporting handling appropriate to Alfa Romeo. Modulation is mechanical and continuous to guarantee the smoothest possible power delivery, and the system is further enhanced by the full range of electronic stability controls to guarantee optimum traction and performance under all driving conditions.