jap spec s15 0-100 = 5.6 seconds
Ap1 s2k 0-100 = 5.7-5.8
Audi s3 0-100 = 5.6 seconds

The only difference i found of the 3 was the audi had a smother ride and was AWD. I had 1 run against a friends s15 jap spec R first 3 gears only and he barely even beat me but none the less beat me. I dragged the S3 and was h2h in all 3 runs. My mate has been driving alot longer then i have and isnt a dud driver. All done legally of course