Bros,
I have just placed the order for the 523i..sorry abt the earlier misinformation about the supposed difference between the bore and stroke on the 523i vs the 525i, guess I was too quick to believe what the salesman told me instead of checking the vehicle literature...yes, the bore and stroke are indeed the same and so are their compression and gear ratios..the only difference I can see at least is on the "Final drive ratio (xDrive)" which is 3.23 : 1 for the 523i and 3.46 : 1 for the 525i.
The 525i costs about $20k more which may be fine if the pockets are deep enough to get an additonal 41 hp. I wonder whether any modding to achieve the same hp as the 525i could be done for a fraction of this difference in price. Tried searching the net but not much information available since the 523i is a new model introduced only this year. My shipment arrives in early June which I think is the 2nd shipment..will fill you guys in on the details when I get them
Cheers
Jericho