Note that some of the car weights are for empty cars while some include a driver and a full tank of gas. Also, some magazines test with only the driver aboard, some with two aboard. And some try to use averages for their times. Suppose they do 6 0-60s....they might throw out the fastest and slowest run and then average the rest. Other testers do many runs and publish only the miracle runs. So you could get different final results depending on how you want to number crunch.