In theory I would agree with you.
The correct engine for a Jaguar XJ, or a BMW 5 Series, is a large capacity petrol engine
But we’ve both already managed to ‘ruin’ the ‘heritage’ of our chosen vehicles by selecting the diesel ones so really is it that much worse to have a petrol one without the right amount of cylinders? Both are sub optimal engine choices made as a result of a compromise. Neither are the engines either of us would select in the ideal world – a world we don’t live in. Arguably a diesel Jag is worse even than a diesel BMW – at least BMW pioneered performance 6 cylinder diesels. Jaguar was all about refined V8 waft and gave in to diesel by simply buying somebody elses
The engine in my 530d is, once it’s warmed up and on the open road, excellent. I think ‘hate’ is a strong word, I don’t hate it. Infact on the right road, on the right journey, I often find myself asking why you’d want any other engine. But of course then the right road finishes and you end up in town, or you have a trip to make through traffic from cold and you then realise exactly why you’d want any other engine – the N57 in the 5 Series is one of the most refined diesel engines in any passenger car, but it’s still a diesel and it still cannot hide that.
I took a 528i out a couple of weeks ago. A typical test drive, 3 of us in the car (They always insist on coming with you don’t they) so I was unable to be quite as testing with the performance as I’d have liked. But the one thing I noticed is that at low speed, in town and from cold, it was quiet and smooth. Much more so than the diesel. And this is what I crave out of my car more than any other feature I think. If I can achieve it without losing the midrange thrust I’ve come to love from the 530d then I’m, very tempted.
In a car like this both a 4 cylinder petrol turbo and a 6 cylinder diesel turbo are compromises. They are both sub optimal. Neither are as good as the 6 or 8 cylinder petrol engine the car arguably deserves. But in a world of high fuel prices and ever tighter emissions regulations I’m beginning to think petrol 4 is a better compromise than diesel 6. And as long as I remain a used car buyer rather than a new car buyer that compromise is probably going to have to be made.