I also wouldn't take the "3-series" as meaning anything. What 3-series? What options? My 330 is basically an engine shy of an M-3 (as I understand it), same suspension, same tires, same brakes. A 325, on the other hand is much less car, all the way around.
If you are talking about the "3-series" in the 2012 Tire Racks testing they used BMW 328i sedan that year , they are up to 300hp and run 245 tires. Nice car with similar track performance to a V6 Mustang...just way more expensive to fix.