Quote:
Originally Posted by henryyxyu
I realize this thread is getting pretty off-topic  to answer OP's question....:
http://www.bimmerfest.com/news/76530...-dyno-numbers/
These guys dyno'd 233HP to the wheel. BMW advertises 240HP for a 228i; Advertised HP ratings are usually crank I believe. 15%-20% loss from crank to wheel HP conversion is pretty standard, so "guesstimated" crank HP is around 275HP - 290HP
So yes, BMW did underrate their advertised HP by about 35HP - 50HP 
EDIT: Just as a reference, EAS dyno'd a M235i at 307WHP, so crank HP rating is about 360HP - 385HP |
This is like the recent Geico commercials:
"Did you know BMW underrates their horsepower ratings?"
"Everybody knows that."
"Well, did you know that owls really aren't that wise?"
...
Maybe the real question should be: does BMW understate their HP numbers
more than other manufacturers?