| the e stands for "eta", its a 2.7L-m20b27. the 325i motor-m20b25, is a 2.5L. the biggest difference is in the stroke length. the e has the same 84mm bore as the m20b25, BUT the m20b27 has a longer stroke=81mm as opposed to the 75mm stroke of the m20b25. it gives the e a little more torwue but not as much hp, i think it had 121hp outta the factory or somethin like that. but yeah, its the stroke. cool thing is you and me both have that extra little bit of room t owork with when it comes to squeezing out all the power possible! |