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Hi Janice,

Yes, but perhaps not the most economical in the class. Going on personal experience, a Mercedes-Benz E 200 or E 250 CDI will average in the high forties mpg whereas a BMW 520d or an Audi A6 2.0 TDI should easily get over the 50mpg barrier in everyday driving.

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Hi John,

Well, an A4 is much more expensive than the Octavia, so that would seem to answer the question. The Octavia uses many of the same components, it’s reliable, decent to drive and very practical so why spend extra? Of course, the Audi is more stylish, sharper to drive and more refined, but it depends on what matters most to you.

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Hi Craig,

The Audi A6 has a timing belt.

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Hi Jenny,

The X3 18d is a little underpowered right enough. Not disastrously so, but if you’ve tried the 20d you’ll feel the difference and there’s very little in it in terms of fuel consumption. On balance, we’d probably go for the Audi, as it’s (arguably) better looking, has a nicer interior and is smoother and more comfortable to drive. Very reliable too.

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Hi Damien,

Right, did the dealer offer a warranty? If so, any faults should be covered. Even if they didn’t, you’re quite right — under consumer protection laws a product has to be ‘of merchantable quality’ and clearly that car isn’t. I’d ask for something in writing from the Audi dealer that inspected the car, setting out exactly what the fault is and then if the dealer still won’t play ball, get your solicitor on the case.

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Hi Patrick,

There doesn't seem to be much that goes wrong with these A4s. Audi is renowned for its solidity and build quality and that seems to be borne out in the A4. Watch for signs of general abuse though - most will have been company cars originally so may have been more abused than cared for. Heavily kerbed wheels may mean the steering needs fixing and there are reports of notchy or heavy gearshifts, although the gearboxes don't actually seem to break or fail. 

I'd expect to pay around about €21k for a 10-reg 2.0 TDI in SE spec.

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Hi Jim,

I'm inclined to agree with you, though it's difficult to know for sure without experiencing it for myself. From what you say it really sounds like a clutch or flywheel problem and the only way to fix it could be a replacement of those items. Not cheap, sadly.

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Hi Brian,

Well, when you say 'super car' that would suggest that money is no object so...

Your choice is slightly limited as there aren't yet any full-on mid-engined diesel supercars, but there are three German powerhouses in the shape of the BMW 640d Gran Coupé, the Audi A7 3.0 TDI Bi-Turbo and the Porsche Panamera Diesel. (There's also the new Maserati Quattroporte diesel, but it pales in the power and torque race a bit.)

Of those the BMW is the best - frugal and well under the 225g/km limit but damn near as quick point to point as an M5. 

If budget is an issue, just grab yourself an E60 BMW 535d. Wheelspin in third gear in that one...

Come back to us if you'd like help narrowing it down a little

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Hi Morgan,

There's no doubt that the Land Cruiser will be the more reliable of the two. Toyota's quality has dipped in some areas of late, but the Land Cruiser is still something of a halo model for the whole range. There is a good reason why Land Cruisers are the vehicle of choice in sub-Saharan Africa and other harsh environments and that's because they're built tough. The current model lacks a little in terms of its cabin appointments (certainly, the Audi feels far plusher) and it does roll a lot through the corners (again, the Audi is much better to drive), but it's superbly comfy, very spacious and you'll be giving it to your grandkids in your will. 

Mind you, the Audi is no shabby player when it comes to reliability, and only really excessive front tyre wear (it's been known to get through a set in as little as 8,000km) and some electrical niggles (watch for powered tailgate problems) seem to count against it.

Our instinct would still be to go for the Toyota though. The Q7 has an unfortunate whiff of the trendy, socialite, school-run SUV about it whereas the Land Cruiser is more appealingly rugged.

Hope that helps

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Hi Patsi,

Go for the Tiguan. It's a really sweet car and much more refined and pleasant to drive than that generation of RAV4. One thing to watch; the boot on the Tiguan is a little on the small side, so bring your dog along for a test drive to make sure that he/she is comfy in the back.

Let us know how you get on