[King T]

Originally Posted by rayhawk

I just don't understand how the ATS is so much slower than the 328i? 4 mph slower and .7s slower in the 1/4? That isn't even close.

Originally Posted by KMPrenger

Yep something is off. Either that, or the BMW is seriously under rated in power. Sorry, but 240HP/255TQ does not equate to a 13.8 second 1/4 mile car in a sedan that weighs 3,450 lbs. I have read BMW had underrated power in some of their other sedans so maybe that applies here?

Yes it is underrated. Look at this dyno

The 2.0L is rated at 240hp/260 lbs-ft from the factory, but it dynoed 240 hp/257 lbs-ft at the wheels! Factor in 11-15% drivetrain loss and this engine is really closer to 270 hp-280hp at the flywheel.

The Cadillac ATS dynoed 239hp/252 lbs-ft at the wheels, more accurate of the SAE ratings.
2013 Cadillac ATS: Dyno Tested
http://www.edmunds.com/car-reviews/t...illac-ats.html

The reason some say that BMW underrates their engines is because many countries in Europe tax based on max hp.