The noise is peculiar, because although it doesn't seem to be a particularly loud, it is all-encompassing cotton wool insulation that sucks the air from around the car making it very difficult to think. It's very easy to bumble along in this growly vacuum without really taking in the fact you are doing well over the national speed limit in a 43-litre, 21-foot 2.7-ton car with a corner in the offing…