sizes of the engine or of the car? but anyway both are the same. same engine, same car dimensions. sport and executive have a slightly bigger turning radius, but that would be due to bigger wheels wouln't it? they are also, as i mentioned, a little heavier than comfort, but not so much. what jme1978 says would imply that sport would perform slightly better than comfort, is that right? i did not have a chance to try both, and even in a sport i am trying to be good
