Expert answer

Hi Elizabeth,

Ok, there's a simple answer and a not-so-simple answer. The simple answer is that the Fiesta is more economical. Going by the official figures, you'll get 78mpg on the combined cycle from the Fiesta (and that's for a model without the stop-start system fitted) and 57mpg from the Audi (that's the 125hp engine with a manual gearbox and 16-inch wheels).

Now, the not-so-simple bit. It depends on how and where you drive. If you drive mostly short journeys and mostly in town, then the diesel is not going to give its best, and that 78mpg figure is pure fiction anyway. I'd say in daily driving you'll probably get closer to 55mpg. The Audi, if driven with a bit of care and attention, should easily get 40mpg, even around town. So there's a gap, but it's not so big as you'd think.

The reverse is true if you're doing lots of long journeys at a steady motorway cruise. The Fiesta would come into its own and you''d probably squeeze 60mpg, maybe 65mpg from it. The Audi probably wouldn't get much above 45mpg, maybe a bit less, doing such journeys.

Expert answer

Hi Terry,

It's very difficult to assess such an issue from afar I'm afraid. Is the engine turning over (i.e. the starting motor is fine)? Is there fuel in the tank? Is the fuel pump in the tank working? Is there spark? Has a sensor failed and there's an electronic problem?

You'll have to bring the car to a mechanic I'm afraid. Best of luck with it.

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Hi Mai,

OK, lots to choose from here. Volkswagen Golf, Ford Focus and Toyota Auris are all ever popular and all with very good reason. They're reliable (the Toyota scoring best here), beautifully made (the Golf come out top in this category) and nice to drive (the Focus wins here). Lots of all three about so you can afford to be picky. Fancy something a bit different? Try a Honda Civic, especially the 1.6 i-DTEC diesel version, which is possibly the best compact diesel engine around.

Also well worth a look are the Kia cee'd (especially the handsome and practical estate version) and the current model of the Peugeot 308 (ditto on the estate version there).

Relevant reviews:

Volkswagen Golf review

Ford Focus review

Toyota Auris review

Honda Civic review

Kia cee'd review

Peugeot 308 review

Expert answer

Hi Tara,

Yes, absolutely. Only major problems seem to be iffy radios and infotainment systems, and a fuel economy readout that's a bare-faced liar, mostly because it's still set to US gallons, not imperial ones.

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Hi Dave,

Quite a bit actually - that 120hp diesel is pretty underpowered in a car as bulky as the A4 and you'll probably notice it most in fuel consumption. You'll have to work it so hard to keep up with traffic that you'll find it quite thirsty. Upgrade to the 140hp if you can.

Relevant reviews:

Audi A4 2.0 TDI 140 review (quattro model)

Audi A4 2.0 TDI 177 review

Expert answer

Hi David,

Do you mean in terms of fuel consumption? Then I'd say about 35- to 40mpg depending on your driving style. If you mean total miles, well it depends how you look after it and how it's been looked after. Cars are generally 'lifed' for between 250,000 miles (400,000km) and 300,000 miles. If you service it and care for it properly, you could potentially get even more...

Expert answer

Hi Josephine,

Our database shows that, if your car is fitted with 195/55 R15 V 85 sized tyres then the correct average pressure is 2.1 bar or 31 PSI. 

This information should be displayed on your car somewhere - either inside the fuel filler flap or on the door frame when you open the door. 

Hope that helps

Expert answer

Hi James,

I'd normally say that at the 20-25k mark you're on the cusp of needing diesel but with that big a price gap between the two I'm minded to say go with petrol. 

The only caveat to that is what kind of mileage you're doing. If that's 25k of endless motorway miles then diesel could still be worth a look as a 318d will easily hit 60mpg on a long run while a 320i will struggle to get above 50mpg.

Expert answer

Hi James,

No, if you're doing that kind of mileage then you probably don't need a diesel - you'll be a long, long time getting back the cost of purchase in fuel savings at any rate. Nothing much wrong with the 07 Verso - they're as solid as you get.

Expert answer

Hi Colette,

It shouldn't be. The MkV Golf was really well made and in fact actually had to be redesigned so that it cost Volkswagen less to build. Generally speaking, cost of repair is always less than cost of change but if you're getting spooked that the car is about to start running up big bills, have a word with your local Volkswagen dealer and get them to give the car the once-over. They'll either be able to reassure you or give you a good deal on a trade-in.