Altitude, temperature, humidity and barometric pressure all have a BIG role in how fast a car will run. If you use the DA (Density Altitude) and correct the times using a online calculator you can have a more accurate way of comparing numbers from cars that are in different states(elevations). A stock SRT-6 in So. Cal. at sea level will run a lot faster than that same exact car would run here in Las Vegas at 2100 ft above sea level...or even worse/slower in Utah at 4700+ feet above sea level.