Originally Posted by bmwzimmer
Everyone and their grandma knows the 335i is underrated. This has been beaten to death already. Many manufacturers underrate horsepower (Z06, Mustang Cobras, Japanese Sport cars in the 90's, ect...) It's nothing new to most people.
Great... Is this your explanation of the 6% achieved by the group below? How can you explain the 7% the M5 gets on the same equipment?
Is the M5 underrated?