Massai is vocal about the advantages of Alfa's Q4 system over the part-time 4x4 systems used in other transverse-engined cars. Based around a central Torsen C differential, Q4 runs a steady-state torque bias to the rear wheels but can alter the torque distribution to suit the driving conditions.

He also revealed that the Q4 system will be further upgraded with an 'active' rear differential, 'active' anti-roll bars and rear-wheel steering.

Active anti-roll bars (which only firm up when the car is being driven hard: at other times they are disengaged to improve ride comfort) are still relatively rare, while an active diff and active rear-steering remain a novel way of ensuring vehicle stability.

Directing differing amounts of torque to the rear wheels improves stability, cornering prowess and should keep the chassis resolutely neutral. Rear steering can also be used to resist oversteer in fast bends (and could work as a very swift stability system without reducing engine power) and should dramatically improve the car's turn-in and agility. With these innovations bundled together, the 157 Q4 promises the one of the most exciting new Alfas for some years.