I have a 2.5 Sport 2003 (90,000 miles). I've had it about a year and covered 24,000 miles in that time, mainly motorway (shorter journies in the last month or so). It sailed its MOT and I've had no problems (touch wood). However, for pretty well the whole time I've had it it's had this annoying 'surging' that it does every day. Starting from cold, and even allowing for the revs to drop before driving off, about a minute into the journey I get a surging which lasts less than 30 seconds normally after which all appears fine. I can feel it through the steering wheel and any passengers can also sense it. More noticeable is a 'thrumming' noise ('thrUMM, thrUMM') from what sounds like the nearside front wheel like the car is going over thoise white line things to slow you down on the approach to a roundabout on a fast run. Somebody suggested this is the 'lurch', but from what I read that's different and has to do with gears (y/n?). Anyone come across this and does it sound serious?