Above: Joerg Bartels, head of sales operations for BMW in Munich A weight difference of 23kg between the two-door BMW M4 and four-door M3 mightn’t seem a lot, but it was very much a talking point at the launch in New Zealand this week of both high-performance cars. It wasn’t as spirited as the debate over BMW’s decision of a couple of years ago to turn the hallowed … [Read more...] about BMW M3/M4: it’s all about hurry-up and weight