A few questions about turbocharging...
Hi, I have a few related questions please about turbo petrol cars. I'm thinking of changing my car soon and might actually go for petrol over diesel this time, mainly due to cheaper purchase price and reliability concerns about diesel cars when warranty runs out.
Do modern turbo petrol cars typically have EGR valves and Dual Mass Flywheels, two parts that often cause problems in diesel cars? Also most turbo petrols of today don't have particle filters, do they?
Final question please: why, if petrol is meant to have more potent power than diesel in many ways and I know petrols can generally manage higher revs and top speeds than diesels, do turbo petrol cars usually have much less torque/pulling power figures than equivalent sized turbo diesel engines? I've found diesels to have much more pulling power and responsiveness at speeds that are actually legal and under the limit, than petrols, in cars I've driven. Why is this when both types have turbos?
K Holden, Waterford.
Kieran Holden (Waterford)Jan 2017 Filed under: diesel
Expert answer
Hi Kieran,
Yes, turbocharged petrol engines do often have exhaust gas recirculation (EGR) systems and dual-mass flywheels, but they are far less likely to cause problems due to, respectively, the different exhaust gases and the torque characteristics of the engine. Added to which, petrol engines work at lower combustions pressures and with less vibration than diesel engines so there's a little less wear and tear to worry about.
No, turbocharged petrol engines don't have particulate filters as, for now, they're considered 'clean' enough not to need them. That will change in the coming years, however.
Finally, the low-down-power thing is simple physics. Most turbocharged petrol engines and their diesel counterparts are pretty close on top-end power numbers (generally grouping around the 110-120hp level), but the difference you're talking about is torque - turning force, that low-down lugging sensation. Some of that is down to turbo design and the fact that a heavier diesel engine can accept higher turbocharger pressures, but most is simply down to the fact that diesel burns from compression ignition, which generates more torque and makes the engine feel more muscular at lower rpm.
Which new seven-seat MPVs would you go for?
I currently have a Ford Galaxy and looking to get a new/nearly new seven-seater. Have you done a review on seven-seaters? What would you recommend?
Luke Tyrrell (Dublin)Jan 2017 Filed under: choosing new car
Expert answer
Hi Luke,
We certainly have done a few reviews... The closest cars to your Galaxy in terms of size and space are the Ford S-Max (a little smaller, but still very roomy) and the SEAT Alhambra (not as swish to drive as the Galaxy, but very spacious and with sliding side doors). There's also the Volkswagen Sharan, which is basically identical to the Alhambra, but a little more expensive. It wasn't on sale in Ireland for a while but it's back now and there are a few second hand ones knocking about.
If you fancy something a little smaller, then try the Opel Zafira Tourer. It's a really underrated car - nice to drive, well made and with decent cabin space.
After that, you're into the smaller MPVs such as the Volkswagen Touran, Kia Carens and so on. Good cars, but much smaller than your Galaxy so you'd be trading down in size terms.
With our practical hats on, we'd go for the SEAT - it's big and useful and those sliding side doors are great.
Here are the reviews themselves if you'd like more detail:
A few others worth considering as well:
Looking for an automatic Nissan Qashqai.
I am looking for an automatic Nissan Qashqai...
Rue M (Harare)Jan 2017 Filed under: automatic
Expert answer
Hi Rue,
No problem, have a look here: http://www.carzone.ie/search/result/cars/make/nissan/model/qashqai/transmission/automatic
Is the Saab 9-5 1.9 diesel a good car?
I have a Saab 9-5 1.9 Tid diesel saloon in relatively good condition and 155,000km on the clock. Is it rated as a good car?
James Mc Greal (Drogheda)Dec 2016 Filed under: reliability
Expert answer
Hi James,
It depends; do you mean the first-generation 9-5, which was in production from 1996 to 2009 or do you mean the short-lived last-of-the-line 9-5, which only survived in production for two years before Saab went bust?
If it’s the first generation car then the rating is a little mixed. It was always well thought of in terms of overall quality, comfort and driving dynamics, but there were a number of annoying, niggling reliability issues with that model, although at least with the 1.9-litre diesel engine you’re avoiding the troublesome 2.2-litre model.
If it’s the later, second-generation version of the 9-5 then it is indeed very well thought of, and generally considered one of Saab’s best cars. It’s just a shame that it was also its last.
Should we repair our Suzuki Ignis?
Hi,
Our reliable 2005 Suzuki Ignis stopped today after five years, on my birthday, happy birthday to me :)
Drove to the shops, came out and there was a tick tick tick whenever the ignition key was turned, then some smoke coming from the dash area and a smell of burning. We had planned to use as a scrappage trade in for the new year but not just yet!
My questions are, does it sound like a starter motor issue? If yes, should we have it repaired - will the car need to be driveable to the new car garage to avail of the scrappage offer? It flew through the NCT earlier this year.
Thanks in advance.
NIAMH O DONNELL (Drogheda)Dec 2016 Filed under: fault
Expert answer
Hi Niamh,
Well, obviously we would advise you to get the car to a garage, preferably a Suzuki one, pretty quick. We can’t diagnose a problem on a car we’ve never seen, but the ticking and smoking does indeed suggest either a starter motor or ignition issue, so it may not be all that expensive to fix, especially if it’s just a wiring problem.
Generally, for most so-called ‘scrappage’ deals (they’re not actually scrappage at all, but trade-in boosters) the cars do indeed need to be running and drive onto the forecourt under their own power, so if you want to use it for that purpose, you’ll need to get it running again somehow.
Any scrappage AND 0% PCP finance deals?
Hi,
I am in the market to replace my 14-year old Peugeot 307. I note a lot of manufacturers have scrappage deals at present. Quite a few also have 0% finance deals, but these two offers are generally mutually exclusive. Do you know of any manufacturer offering both deals on new cars?
Thanks for your time, Rowland
Rowland Crawte (Raheny)Nov 2016 Filed under: finance
Expert answer
Hi Rowland,
Sadly no, the two offers are generally mutually exclusive. On top of which, the zero per cent finance offers are generally only on PCP (or Personal Contract Purchase) plans. Being as those run on a three-year replacement cycle and you’ve kept your Peugeot for 14 years, I’d suggest that they may not be the ideal way to buy a car for you. I reckon you’d be better off with either a Hire Purchase plan or a bank loan and taking full advantage of the ‘scrappage’ discount.
How best to upgrade to a newer car?
Hi, I am thinking of changing my 2006 Nissan Navara in the next nine months. I was thinking of upgrading to 2011/12 Volkswagen Passat or Ford Mondeo and my budget is about €12,000. The problem is I don't know how to sell my own car. It's seen far better days and the engine isn't in great condition either. Most dealers are offering €3,500 or less and I tried cash4cars and they're not interested. I am hoping to get four grand plus for it but don't have the time to sell it privately. I really don't know what to do with my Navara and was wondering if you would know?
Many thanks, Denis
Mike Connolly (Wicklow Town )Nov 2016 Filed under: choosing used car
Expert answer
Hi Mike,
Are dealer extras on a new car worth it?
Are the extras that dealers add to the price of cars actually necessary or beneficial? The last time I bought a car the dealer looked up the list price, added delivery charges and metallic paint/optional extras and that was the price you paid. Now in addition to all that there's a dealer seal and protect coating and step back insurance. Showroom sales staff really push these with a hard sell, but they can add €1,000 to €1,200 to the cost of a car. Question is, are they worth it?
Martin (Meath)Nov 2016 Filed under: optional extras
Expert answer
Hi Martin,
Dealer seal isn't really worth it in my opinion because for most of the year Irish roads aren't gritted and salted. I know they are this week, but a regular trip to the car wash will do just as good a job as 'dealer seal.' Protect coating is pretty similar. You'd be better off just keeping the car in good condition and taking care of stone chips etc as and when they occur. Step back protection is like any form of payment protection insurance - it has its uses, but buy carefully and make sure you study the small print with great care.
Is my Volkswagen Polo TDI the most efficient?
What's the most economical car for long distance commuting (100km) to work daily? Is my 141 Volkswagen Polo 1.2 TDI the most fuel efficient car there is on the market?
Anne, Cork
Anne O'Sullivan (Meath)Expert answer
Hi Anne,
Actually, it’s not far off. I’d say, with a bit of practice, you should be able to beat 60-65mpg on a regular basis with that Polo, and to be honest you’re not going to get much better than that from any car. There are plenty of cars with official economy figures up in the 70s and 80s mpg, but those are laboratory figures and damned near impossible to reach in real world driving. If economy is your priority, then I’d stick with that Polo.
I like the look of the new Ford Kuga...
I like the look of the new Ford Kuga. Which version is best and what will it cost? Any other cars I should look at?
Dave Peterson (Dublin)Nov 2016 Filed under: choosing new car
Expert answer
Hi Dave,
If you find the overall aesthetics of a car matter to you then the Kuga ST Line is the best version of the new line-up to go for. It looks especially good in darker colours. We’re also fans of the Volkswagen Tiguan, though it is at the more expensive end of the market. A similarly good looking car, and more affordable, is the SEAT Ateca. Here are our reviews to help you decide:
