Diesel engines are more reliable and more powerful. on’t believe all the hype about diesel being more polluting. It was only a few years ago that the UK government said exactly the opposite. If you want to be really non polluting, go for diesel and use bio-diesel in it. The older Peugeots, for example (my old Peugeot 405 estate) ran on 100% veggie oil bought in bulk from a supermarket for a fraction of the price of diesel, and in summer, ran like a dream, even getting more MPG than on straight diesel. The 406 had a hissy fit and refused to perform though. My current thirsty Chrysler grand voyager, also runs happily on veggie oil and I manage to get more than the usual measly 25mpg out of her on veggie oil.
Personally have driven petrol and diesel vehicles over the last 30 odd years, I’d go for diesel every time.