Hi
Just an hour ago I was testing out my Corvette Z06 and my Mustang Cobra R on the test track.(0-400, 0-1000) I deleted all my previos records and just, well, started testing them out. My corvette kept on beating my mustang(by less than a second no matter how many times I tried) and after a while, I realized that the HP for my Corvette went from 671 to 675
and my Mustangs HP went from 659 to 655
. I dont know if this will work for any other car but you should try it. Im to lazy 
Just an hour ago I was testing out my Corvette Z06 and my Mustang Cobra R on the test track.(0-400, 0-1000) I deleted all my previos records and just, well, started testing them out. My corvette kept on beating my mustang(by less than a second no matter how many times I tried) and after a while, I realized that the HP for my Corvette went from 671 to 675