[TW]Fox;25976622 said:
It would be a no brainer if it were true, but it's not - if you are averaging just 25mpg in a 330i then you won't be averaging 40mpg from a 'mapped' 330d over the same driving profile.
You are also ignoring non-fuel running costs. A £9k 330i has a reliable indirect injection N52 engine. A £9k 330d has a commonrail direct injection turbocharged engine with DPF.
And what makes you think it isn't true. I speak from actual personal experience having owned these motors and driven them for many thousands of miles. All the time, recording fuel consumption accurately using fully.com, NOT obc values.
When I make a statement as I did above, it is very much through personal experience, not what read on the internet thank you very much. I do not enjoy being accused of what basically amounts to lying.
Yes, there is a turbo and PDF on the 330d that are not present on the petrol. And I guess there is some risk in these elements being present. However, I have done many thousands of miles in cars with both of these components, and never once had a problem with either.
It's luck of the draw really, you could end up with a dodgy turbo, that's unlucky. If I ever had a DPF fail, which I haven't in well over 40k of driving with DPF's, then I would simply bypass it anyway, thus increasing my power output and helping fuel economy. Not what I would consider a massive drawback.
By all means, I'm all for advising people. And will give advice based on my personal experience. I wouldn't read too much into scaremongering on the internet. Yes, it'll be evident there are the stories of a few people who have these problems. It'll also be true that the many thousands that don't have these problems won't say a peep, and just keep on driving, happily, in a car that does everything they want, and does it well.
As for defining a car as fast or not, my personal experience has taught me that less than around 300 bhp is not a fast car. This of course is referring to modern cars, in excess of 1.5 tons. A 980 kg pocket rocket with 200 bhp will be fairly rapid, but that is not what he is looking for.
My 530d with 258 bhp is not fast. It is fast enough, but not a fast car. My 350 bhp 335d was a fast car though, as was my v8 S4. My 330i was a disappointment, as was my R32. These are examples of fast cars, and cars that simply weren't fast enough for the fuel they used. In my opinion.