I have no problem arguing. It's impossible for the new gen. m3 to be the same weight as the last gen. The last gen. m3 weighed right around your estimate for the new one at3400 lbs (1550 kg). The new V8 weighs slightly less than the previous inline 6 and employs carbon fiber but not enough to offset the bigger heavier bodystyle that bmw went with in the new 3 series lineup let alone all the technology added into the M version.