Thanks for you thoughts on the Q2 Diff - Guys
Although I have read that "Alfa Workshop, Royston" do appear to do a Retro-fit for the 159 and Brera. Listed under their "How to fit Q2 Differential", it suggests that they are able to fit the Q2 diff to any Model with the Pull type Clutch, although it then goes on to mention about the 159 & Brera, "Fitting Prodcedure is different, as is the Cost" - No surprise there.
Please excuse my Ignorance - Does the 159 use a Pull Type Clutch ???
My Understanding is the Q2 Limited Slip Diff acts as a Torque Sensing Mechanical Device- a series of Worm Gears, which allows the even Distribution of Power and Added Traction to the Wheels. The VDC and Electronic Gismos only work to Prevent the loss of Traction and Aid Stabilty when pushing the Car hard, by reducing the Power to the Wheels either by Reducing the Throttle or by using the ABS Braking System to Slow the Car.
What a Limited-Slip Diff does is to evenly distribute the Power to both Driven Wheels under load. Reducing the amount of Under-steer, whilst still being able to Powering-On into a corner- Allowing the Driver to have better use of the Engines Torque / Power.
I take it nobody has had a "Alfa Workshop's" Limited-Slip Diff fitted in a 159
Look forward to your thoughts