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Also consider your "launch", how much wheel spin you have, and even consider the weather/elevation to be a factor. Drivers ability could easily vary a few 1/10ths of a second
The wheels are slowing you down, tire sizes also make a difference. You could keep stock wheels and have the wrong size tires on and they would be a percentage slower than they should be. Plus, aren't the X models heavier than a standard coupe?
Yes, but on the other hand, the Haldex AWD helps to put available power down without unwanted spin at the rear wheels, thereby eliminating that kind of parasitic loss. Most true supercars put the rubber to the road at all four wheels, most certainly by design.
Not sure if OP's G is auto or manual, but as others have stated, wheel and tire combination are likely the culprit, and our cars are not exactly robust on torque, and without good torque, HP will take the car only so fast off the line.
Did you take any action to recalibrate your speedometer after changing your wheel size? Is the car smart enough to understand the difference in wheel diameter? I understand your tires would be lower profile, but I've personally experienced a 10mph differential, but it was on a 90's Fox body. It could be that you're doing 65 when you stop your watch. ???
