I have a daily commute to Birmingham. The rail service is expensive and takes longer than the car journey of 60 miles each way (half on empty minor roads and half on the M6). At present, I drive a boring but reliable Mondeo 2.2 diesel that achieves about 47mpg. I want to replace it and would like a bit more excitement without adding to the overall cost. I am tempted to buy a 5-year-old Jag XK and convert it to LPG. Or should I get another diesel Mondeo or a Skoda Octavia? I prefer larger cars as they feel safer and are generally quieter.