RR,
I remember Grande 4WD was claimed to be 8.9 sec 0 - 100kmh
I don't have a VBox (that was a very impressive kit, RR), but have a 5Hz GPS delivered today why not use it with racechrono (from www.racechrono.com)
That is my result
Totally stock, stock engine oil , 15000km on the clock, 38psi, I think the traction control is off (I only press it once, is that off?) and just stand on the gas on S3.
8.29 sec <_<