改以前quattro的前后动力分配是40/60，现在成了前驱，必要时最多分给后轴50%。porche的四驱又不一样

前后动力分配是31%/69%。

zt “Porsche uses a proprietary AWD and creates a 31/69 (front/rear) split with electronic differential lock. It is an expensive and overengineered system”。

Macan>SQ5>Q5, 感觉还是一分价钱一分货。