Same happened to me last week on a sunny day, now come on I have a 4.2 ltr V8 in the XKR pushing out 430 bhp with the Supercharger, The dual carriageway was on quite a steep incline upwards therefore I played with him accelerating/decelerating etc. Still a little boy at heart. Welcome to The Jaguar Owners Club Gary have fun with your new toy and if there is and questions you need answering then there is always someone on here that will oblige