Drivetrain losses are pretty much irrelevant in real life. They appear hugely different on a rolling road, but thats only becuase your not measuring the losses from the two undriven wheels on the 2wd car.
Can you tell me what your cars sticker says the weight is, and if you've done any mods that might have increased it?
The site claims 1700kgs for an RS4 and 1505kgs for an S4, but that seems like a large difference for what is in effect a pretty similar car.
Parker's give the S4 weight as 1595 KG which is the figure that I used for the calculation.
I've not been driving that long, always been it to bikes.
I'm surprised how much power it takes to do a 12 sec standing quarter
My old VF500 (84) could do a 12.5 on about 60bhp
Car looks brilliant Nez. Just sort out those wheel centre caps!
car looked awesome at gti fest. but the base of the led rear light clusters need colour coding
got a good view of rear end when we where next to you on strip!