I recently restarted GT5 a couple of weeks ago, after a break of 9 years and I recognized after testing some setups that a second car has different power and a third car too. Then I recognized that my bought stock/unmodified California has 333 kW and another California I won has 328 kW and when I want to buy a new California it says it has 338 kW. Just to be clear, I have not even mad a oil change at the Californias, that would boost from 333 kW to 350 kW and from 328 kW to 345 kW. The gap from two full modified Corvette ZR1 RMs are even bigger, 654 kW to 675 kW which make 4 powerpoints. Is there a system behind this random powers?