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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

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Hi Keith,

We asked Audi Ireland and this was the (long!) response:

"Our recommendation is that the timing belt should be checked when the car is either five years old or approaching 120,000km on the clock. Replacement intervals may vary slightly so it is best to consult your local authorised Audi service centre, but generally speaking the above is what we advise.

We operate fixed price service options for vehicles aged 3-10 years so for a 2009 A4, timing belt replacement would cost €449 and this includes complimentary Audi Roadside Assistance including Homestart, a two-year Audi Genuine Parts guarantee, complimentary Audi Clear Screen Pack (1.0-litre screen wash and 0.5-litre de-icer), wash and vac and Audi mobility offer (courtesy car etc.)."

Hopefully that clears things up?

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Hi Chris,

Well, the simplest answer to your rain problem is that it sounds as if the door or window seals are gone, or it could possibly be a leak from the air conditioning system. A quick trip to the garage should sort that out. As for the Duster, it’s a fine car for the money — they’re reasonably nice to drive, certainly rugged and reliable and very practical too, but you’re going to have to put up with seats that are less than stellar on longer journeys, and a dashboard made of the lowest-grade plastics around.

2016 Dacia Duster review (post-facelift)

2012 Dacia Duster review

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Hi Derry,

The S line spec on an A4 is nice, especially in styling terms, but it does also include lower, stiffer suspension, so if you value your comfort and refinement, maybe go for an SE instead. As for things to watch for, obviously with any car of that age you need to check pretty much everything very carefully, and don’t buy anything that doesn’t come with a full service history. Check that the MMI infotainment system is all working properly (it’s a major trouble spot), and check the carpets for damp spots as the air conditioning system often leaks. S line models often develop tracking issues, so check the front tyres for uneven wear, and a dull thud from the suspension when going over bumps means the anti-roll bar drop links need replacing, too.

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Hi Derry,

Nothing much to keep an eye on mechanically speaking, as these are well-built and reliable cars. Just watch for kerbed alloys as that could mean that the steering has been knocked out of alignment. Obviously, you'll want a fully-stamped-up service history. As for the S Line model, try before you buy. Yes, the styling add-ons look good, but the A4 already has quite a firm ride quality and the S Line suspension firms that up even more. It may not be to your taste.

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Hi there,

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Hi James,

Well, frankly that's a good dilemma to have. Both are utterly excellent cars and you honestly won't go wrong picking either.

To compare, you're right that the BMW does feel that bit more reactive, that bit more plugged in to the road surface, but the gap between the A6 and the 5 Series is far narrower in that regard than once it was. 

You're also right that the 5 Series is becoming a touch, shall we say, common on the roads these days and while Audi is hardly struggling to shift A6s, they are perhaps a little less widely seen.

One small spanner in the works; have you tried the Jaguar XF? It does give a little away to both the Germans in terms of cabin design and space, but it's gorgeous and utterly brilliant to drive. Plus, of a Friday night, you get to turn to your significant other and utter the immortal words; "Darling, tonight, shall we take the Jaaaaaaaaag...?"

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Hi Philip,

The current A6 allroad quattro was actually only introduced last year (2012) so there won't be any major updates for a while yet. The previous generations ran from 1999 to 2006 and 2006 to 2012.