Watching the Australian Rally Championship last night (there was sod all else on !) they had some good overlay shots of cars taking a 90 degree left hander. The 3 being compared all had different drive trains, i.e., 4WD Active Differential, 4WD Passive Differential and 2WD. The difference on this one corner alone (I presume we can ignore power and weight) was half a car length between active and passive and over a car length between 4WD and 2WD.
Is the active Diff like you have on a skyline and a passive Diff like on the Impreza. More info required if possible !

Cheers

Andy

I think the GT-R can't be classified as a true 4wd car as under normal conditions, 100% of the torque is transferred to the rear wheels only. Only when the going gets tough, then the electronics will direct some torque to the front. So in a sense yes, but I think those rally cars that have active diffs can change the torque split between wheels on the same axle, as well as between front and rear wheels.
Maybe the AYC in Evo and Galant VR-4 can be classified as an active diff, I'm not sure.
WRX and STi have Suretrac rear diffs made by AP, anyone know what's the difference?