Expert answer

Hi Bridie,

It depends what you mean by ‘the engine’, but we’ll assume for now that you mean the most commonly-sold Insignia, the 2.0-litre CDTi. As far as our research goes, these are reasonably robust units and only have three common areas for faults – the diesel particulate filter, which, as with any diesel engine, can get clogged up if you don’t do regular long journeys; the turbocharger, which can fail; and the dual-mass flywheel,  which can also fail.

Now, fair enough, turbo or dual-mass flywheel problems can be very expensive, but the Insignia is far from alone in suffering from those issues, and it doesn’t seem to be that the problems are endemic, nor even all that common.

When you say reviews, do you mean comments on internet articles? Not the same thing I’m afraid – someone who can be bothered to comment online generally already has a problem with their car, so you don’t get to hear from those who’ve had faultless miles of service. It’s called confirmation bias.

Instead of ruling out a given make/model, it's best to take a close look at examples that are offered for sale.

Expert answer

Hi Michael,

I’d suggest that a Passat GTE or 330e would be about perfect with that kind of mileage and usage. It will help, of course, if you have a driveway where you can fit a charging point, but once the batteries have drained and you’re running on normal hybrid power, both of those cars will average better than 40mpg. Here are our reviews:

BMW 330e review

Volkswagen Passat GTE review

Expert answer

Hi Peter,

Sounds like an excellent choice. Our Editor, Shane, has driven the Sportback on its international launch recently and rates it. The BMW 4 Series Gran Coupe is a little sharper to drive, but the new A5 has caught up some in the dynamic stakes, added to which it's truly gorgeous inside and out. Here are links to his test drives:

Audi A5 TDI Sportback review

Audi S5 Sportback review

Expert answer

Hi Cyril,

Actually, the current 1.5 EcoBoost petrol model is rather a nice thing. It’s a very smooth, quiet engine and has just about enough poke to shift that big body around, and actually ends up feeling slightly sweeter than the diesel to drive. Economy works out at around 40mpg in most conditions, so it’s not too thirsty and if you’re not doing really big mileage every year, it’s definitely worth considering.

Ford Mondeo 2.0 TDCi diesel review

Ford Mondeo 1.6 TDCi diesel review

Expert answer

Hi Declan,

It’s a tough one. Generally I’d say for the moment, diesel is still best for that kind of mileage, especially day-to-day. A model with a good stop-start system should help keep the consumption down in heavy traffic (Mazda’s system on the 6 2.2 diesel is especially good) and those long motorway miles are just what diesel was designed for. A plugin hybrid is really for those doing short urban journeys most days, with only an occasional long trip, so I don’t think any would be really suitable for you. It would be worth looking at a new-shape Toyota Prius hybrid though – we managed to average 60mpg in one recently over the course of a week, including several long motorway runs, so it’s worth thinking about.

Expert answer

Hi John,

No, it’s not just another cost to the consumer. Stop-start systems are designed to prevent the car from running the engine unnecessarily at standstill when doing so would be at its most wasteful of fuel. After all, if you’re not moving then what is the point in having the engine on? Stop-start systems are specially designed with either a beefed-up alternator or an integrated starter/generator so that it can handle multiple stops and restarts in rapid succession, and it’s estimated that on an average car, stop-start can save as much as ten per cent of overall fuel consumption – not to be sniffed at, never mind the benefits to city-centre air quality.

Admittedly, the car makers have brought in stop-start to bring their cars' official CO₂ and fuel consumption figures down, and the benefits are only really felt if you are stopping and starting regularly. If you spend all your driving time on the motorway then you won't use the system at all.

Expert answer

Hi Miceal,

As a trade-in, somewhere in the region of €8,000 I would think.

Expert answer

Hi Mairead,

It depends which model you mean. An automatic 2.0-litre VVT-i petrol RAV4 from 2008 has CO₂ emissions of 212g/km, so will cost €1,200 a year. The manual version has CO₂ emissions of 202g/km so costs the same. It gets a bit better with the diesels. The 180hp 2.2 diesel has emissions of 185g/km so costs €750 a year while the 150hp version has emissions of 173g/km so costs the same €750.

Expert answer

Hi John,

It depends on the engine. The 1.6-litre petrol needs it to be changed every 160,000km or every eight years, the 1.8, 2.0 and 2.2 diesels need to have their belts changed every 200,000km or every 10 years.

Expert answer

Hi David,

They’re not bad actually. The only major mechanical items that cause regular bother are the engine’s exhaust gas recirculation valve (if the engine is down on power or putting out lots of smoke, suspect this…) and the fragile water pump on the 1.6 HDi diesel. That 1.6 also needs a steady diet of high grade oil at service time. The only other issues are minor electrical niggles, such as the electronic parking brake, sticking fuel filler flaps and the like. Buy one with a full service history and keep it serviced and you should be fine.