Car and Driver in a positive review of the 428i AT went 0-60 in 5.3 seconds. I don't have the issue in from of me at the office but I think the 1/4 mile was 14.1 at 99 mph. This model had summer tires and was an MSport model. That is damn quick for a 3500 pound coupe with a (rated) 240 HP engine. I'm guessing it should be rated closer to 270 as mentioned here in the past.