stevebasshead said:
My test drive was in the diesel and it pulled fantastically, just not for very long. Like all diesels it has a more limited rev range than I like and it didn't fit my driving style, so it didn't suit me. I'm not sure the salesman was happy with me bouncing off the rev limiter! But I couldn't get used to how quickly it ran out of revs. It was otherwise very impressive for a diesel though. Gobs of torque and a nice sound.
I have to say that in general terms I'm not a particular fan of diesels. They're always bigger than the petrol equivalent and need a turbo just to provide similar performance to a non-turbo petrol equivalent. It irks my sense of efficiency
I also can't help wondering how good petrol engines would be if all the R & D money that was spent making diesels refined enough and powerful enough and clean enough to use in family cars had been spent refining petrol engines instead.
But the money that was spent certainly is producing some very refined diesels and seeing as they're here to stay I'm glad the RCZ has one if the best in its lineup
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I can understand that the salesman wasn't happy with you bouncing the rev limiter because with a diesel it doesn't make sense to do that!
You will already have plenty of torque in the next gear so you don't gain anything with revving it high and it needlessly strains the engine.
It's really only from 4th gear up that it makes a difference.
You are mistaking about less R&D having gone into petrol engines. The reality just is that with diesel engines it is so much easier to achieve high mpg because the engines are so strong at low revs so don't need high revs for good performance so need less fuel.
I always drive faster than speed limit but still average around 54 mpg currently.
With regards to petrol engines, a lot of development went into all kinds of systems and downsizing but this is really only effective in the official lab measurements and the figures obtained are very difficult to get in real world driving because the smaller blocks need to be pushed more to perform.