2.5L + 4speed manual = 3.55
2.5L + 5speed manual = 4.10
but the only way to know for sure is to check. either pop the cover or jack up one rear tire, put the trans in neutral and rotate that tire around twice while counting the driveshaft revolutions. (if for some reason the rear axle has a posi, then rotate only once)
just over 4 times = 4.10s
three and a half = 3.55