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Hi Dawn,

Well, according to the official figures, a 2008 Yaris 1.4 D-4D should give you about 62mpg. But, it's a car you're probably going to have a deal of trouble tracking down as few will have been sold here in the first place because of the price premium over the 1.0 and 1.3 petrol versions. A 1.0 petrol Yaris won't be quite so economical on a long run, but the fact that it will be easier to find and cheaper to buy may well outweigh that.

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Hi Sue,

There's only one serious recurring problem and it's an issue with the diesel injectors that can be very expensive to fix. If the car is reluctant to start or accelerates sluggishly, leave it and walk away. Otherwise, you just have to make sure that it has a full Volvo service history - the XC90 is quite a complex vehicle and needs to be properly cared for, so if any servicing has been skipped, it's starting on the road to trouble. Likewise, have a careful check for ill-fitting body or interior panels. Everything should be straight and true (XC90s are high in quality) and if it isn't then you need to suspect accident or off-roading damage.

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Hi Peter,

A brilliant car, albeit one with a couple of shortcomings relative to its German rivals. It's probably the best-looking car in the class, and the 500-litre boot is a match for the BMW 5 Series Touring and Audi A6 Avant (though much smaller than that of the Mercedes-Benz E-Class). It's utterly delightful to drive too, better even than the much-praised BMW, with brilliant steering and a comfy ride.

On the downside, the interior is a step behind the Germans (not enough space, old-fashioned touch-screen infotainment system, narrow front seats) and the fuel tank is on the small side, limiting your touring range and making the car feel thirstier than it actually is. The 2.2-litre diesel engine in 190hp form is the best all-round to go for, but the lower power 163hp is a bit cheaper to buy and you'll hardly ever notice the difference in day-to-day driving. Or, you could get the best version; the 272hp 3.0 D V6 diesel – a properly quick, practical car that.

Here's our road test of the XF Sportbrake

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Hi Bobby,

Well, it's a lot better than the old Mégane, but then that's not saying much... It should be fine, actually. That 1.5 dCi diesel is a solid engine, and Nissan uses it too so it can't be bad, right? Keep an eye on all electrical systems though as these seem to be a perennial Renault weak point and carefully check the rather cheap-feeling cabin for signs of excess wear and tear.

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Hi David,

A well-made car the Astra, and quite sweet to drive. Just watch for leaky boot seals letting water in (a fault the Astra shares with the Insignia) and dodgy cruise control that disengages without warning. That 1.7 diesel is economical enough but it's dog rough on the ears and has a habit of stalling when you go to pull out of a junction. Have a try of the 1.3 diesel before you buy - it's a slightly sweeter unit.

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Hi Michael,

Should be fine, but just check all the electrics and buttons on the inside, as one of the few weak areas on the Vitara is in its wiring. Also make sure that a recall to have the front suspension attended to has been done, and check the service book - Vitaras have rather short 10,000km service intervals so one or two may have been skipped. Other than that, it should be a good 'un.

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Hi Jim,

I'd say you're just on the cusp of switching from petrol to diesel, but the 1.2 turbo petrol Qashqai is an excellent car, and on paper you should be able to get good enough economy out of it to not need to pay the extra for the 1.5 dCi diesel. Maybe ask your Nissan dealer if you can take one for a 48-hour test, to see exactly how good the economy is on your usual driving routes.

Let us know how you get on

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Hi John,

Not bad, but a car that's somewhat feeling its age now. Hardly surprising, as it's due for a mid-life facelift - something that was revealed at the Geneva Motor Show this week. The 1.5 dCi diesel engine is decent, but the petrol version somewhat less so and the least said about the Nismo version the better. Quality is excellent and it rides and drives well, but I'd either wait for the new one, or save up and get a more capable Qashqai.

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Hi Catherine,

Go for the Ford C-Max. They're ruggedly reliable and good to drive. Méganes of that era are best avoided.

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Hi Patrick,

Volvo tends to build its cars pretty tough and the S80 is no different. Make sure that the timing belt (and its tensioners and pulleys) have been attended to at service time and that all of the electrics are working properly - apparently the S80 has a habit of warning of electrical failures when the components are actually fine.