325_driver 422 Report post Posted July 13, 2008 hey guys, Wondering about the differences IF ANY, between the m20b25 motor in the e28's and e30's, are they identical? what differences would there be ? Are the ones in the e30 better than the old e28 ones ? Cheers thanks heaps Quote Share this post Link to post Share on other sites
E30stz 0 Report post Posted July 13, 2008 (edited) From what I've heard and (correct me if I'm wrong) if I remember rightly the E28 525i has the M30 engine at around 150hp while the E28 525ee has the M20B27 engine but runs a 2.7L at something like 120-125hp. The 325i E30 variant runs an M20B25 170 hp but is only a 2.5L. Some people mix together the 525e engines with the 325/323/320i engines and produce a 2.7L stroker which put out somewhere between 170-200 hp. So some variations there in spec. Edited July 13, 2008 by Flux Quote Share this post Link to post Share on other sites
BM WORLD 1283 Report post Posted July 13, 2008 corect . 525i e28 had a M30 engine . 525e had a m20 2.7L engine . you can use a e34 525i 88-90 M20 engine for a e30 if needed Quote Share this post Link to post Share on other sites
325_driver 422 Report post Posted July 13, 2008 corect . 525i e28 had a M30 engine . 525e had a m20 2.7L engine . you can use a e34 525i 88-90 M20 engine for a e30 if needed ahh got ya, so the engine that youll find in a e30, will definitely be different to the e28 ones. reason i was asking, some one is giving me a 2.5 litre out of a e28, that is aparantly a m20, so im assuming itll be 525ee, thanks heaps Quote Share this post Link to post Share on other sites
BM WORLD 1283 Report post Posted July 13, 2008 ahh got ya, so the engine that youll find in a e30, will definitely be different to the e28 ones. reason i was asking, some one is giving me a 2.5 litre out of a e28, that is aparantly a m20, so im assuming itll be 525ee, thanks heaps ok . you will need to swap the sump and oil pick up over too if its from a 525e . also engine loom will need to be from a e30 early 325i 85-87 etc with the flywheel pick up sensors etc . or convert it to the newer motronic system from the face lift e30 325i and get the ecu reprogrammed .etc ...lots of mucking around , to get it working properly . Quote Share this post Link to post Share on other sites