Post by Marvin
They dont seem to be getting any more economical, just more powerful.
More powerful for the same fuel consumption, so they are indeed more
economical! You can get 1.4 (even 1.3 IIRC) turbodiesels now which are
quicker and more economical than 1.7 turbodiesels of yesteryear.
Manufacturers are naturally also offering the bigger, sportier lumps as well
like the 130-150BHP types, because they sell to customers who would have
perhaps bought performance, and hence quite thirsty, petrols. There's plenty
of smaller engined, highly economical Diesel cars out there though.
Diesels are not just about economy these days- they have other benefits as
well and Diesel engines cover options from small and frugal to fast and
Post by Marvin
Meanwhile, the price of diesel is getting a bit silly.
Post by Marvin
Is it worth buying a diesel car anymore?
Yes. Good points IMO-
Generally better power delivery than petrol on a turbo diesel IMO, so
they're often more fun to drive.
Much better engine longevity if well maintained. I'd be quite happy to buy a
Diesel with 200K+ on the clock provided it ran well and sounded good.
Less bore/ring wear when cold- diesel has some lubricating properties,
unlike petrol which breaks down cylinder lubrication. AIUI it's less of an
issue on modern cars though.
Able to run on a wide range of fuels in some cases. That could be important
in the future if and when oil is rationed.
Better fuel economy for a given performance figure. Sporty power levels like
130 or 150BHP but still achieve 50mpg, can the average petrol engined car do
No damp starting or faulty ignition problems.
Usually better resale value.
Modern common rail Diesels have very clean exhausts.
No explosion if you crash! It's also safe during refuelling, no amount of
sparking will ignite it.
Bad points IMO:
Some don't like the noise. I did find the 'pinking'/random clicking noise on
acceleration (suppressed diesel knock?) on a loaned 2005 Astra DTi a bit
annoying- I think I'd have preferred the good old diesel noise!
Dearer when new.
Limited rev range compared to petrol. (But the turbo makes up for that IMO)
Not all garages are completely Diesel-savvy.
Rely on turbochargers to give good peformance- when they go wrong it can be
disastrous. (smaller DCi engine owners beware!)
Refuelling- it's oily and smelly stuff and if some numpty gets it on the
pump handle it gets on your hands and stays there, unlike petrol which
Can be very expensive when the Diesel pumps break.
Heavier lumps can mean different handling characteristics, though I
preferred my Focus TDDI to my 1.6 Zetec.
Non-turbo diesels are no fun to drive, but AFAIK no one makes them anymore
so it's irrelevent.
Basically, diesels are great used buys when the price differential to
petrols is much less, but if buying new some people will need to calculate
the extra cost v miles covered in its lifetime as it could take years to pay
for itself. OTOH some people will pay the extra cost for a Diesel for
reasons other than economy, a point many petrol advocates seem to forget.