Two advantages that the 1.6 petrol engine has. First, it's simple - there are no £1,000 boxes of electronic trouble waiting to ambush you when it gets middle-aged, and no £1500 turbo to fail, and no high-pressure fuel pump (that'll be another £750, sir).
And secondly, there are no plans to charge petrol cars an additional tenner a day to drive into places like Bristol or Cambridge or Birmingham or a couple of dozen other cities. That was what clinched it for me, and why I switched away from diesel. My 1.6 petrol estate has far more power than my old Passat, and is faster in every way, even though it has less low-down grunt. I just have to rev it a bit higher when taking off. MPG on the 1.6 ranges from 37 around town to 45-47 on a straight motorway thrash. It works for me!