It seems a lot of focus has been put on the P85D's amazing acceleration, but I haven't heard or read much talk about its braking ability. Common sense and aftermarket tuning generally dictates that when an engine is upgraded, or more generically power output is greatly enhanced, so too should the braking systems (bitter/bigger rotors, calipers, pads, etc.) When I test drove the 85 and P85 back-to-back, I could sense that the brakes on the P85 were struggling to keep up with the extra power. While driving through some twisty hilly roads, I got a mushy feeling out them that could have gotten me in trouble if I was pushing harder. Anyway, I just hope Tesla gave this some good thoughts, but if anyone has any inside information on the P85D brakes before the first customer cars have been delivered, please do share.