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Hi Brian,

This very match will be the subject of a twin test shorty in our iPad Mag so I don't want to give the game away too much!

Saying that, they're very different cars. Technically and logically the BMW M4 is dominant. It's considerably faster at all times too, yet the customisation of its driving systems that is open to the driver makes it suitable for everything from long distance cruising, to the school run and then the odd track day. It's an astounding car I'd personally love to own. It'd take years to learn it fully and if you like a challenge then it's the one for you. However, unlike the previous M3 Coupé, it's more docile at times, meaning the uninitiated aren't scared off by crazy twitchiness.

The Jaguar is much more laid back by default. Yes it's quick by any measure, and can make a sound all the more alluring than the BMW, but, in V6 or V6S guises at least, isn't quite as focused on hard-core driving. It drives very well, don't get me wrong, but the BMW would run rings around it on track.

Clearly that won't matter to many people and we suspect that this decision would be won by the heart. As I write this I'm torn. I adore the looks of the Jaguar and that may be enough to swing the decision, but in pure black and white terms, the M4 Coupé is a more accomplished car.

Let us know if you buy one or the other!

Further reading:

BMW M4 Coupé first drive

Jaguar F-Type V6S Coupé first drive

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Hi Sean,

Go for the 1.6. It's more economical, has lower emissions and is more common than the 1.8, so parts and bits are easier to come by if anything goes wrong. Now, watch the turbo like a hawk, the exhaust gas recirculation valve can give trouble and make sure you insist on proper, high-quality synthetic oil whenever it's serviced. The older 1.8 is actually a bit of a cracking engine, and an in-house Ford designed unit, not shared with other brands as the 1.6 is (Peugeot, Citroen, Volvo and MINI have all shared the same engine). It's a good unit, but the easier running costs of the 1.6 just make it the better choice.

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Hi Claire,

I'd go for the Leon. The Focus is a fine car, don't get me wrong, but the Leon is (as you point out) better looking, SEATs have incredibly good build quality and reliability (we've had four SEATs in our family and from personal experience there's barely been a day off the road between any of them) and the Leon is really good to drive too. Cracking car, you won't go wrong.

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Hi Marie,

Funnily enough this is similar to a series of incidents I went through with my father-in-law a few years back. He also had a BMW (a 5 Series) that was giving him no end of trouble and after, I think, the fourth time it left him stranded at the side of the road, he finally got sick of it and started shopping for a new car. I pointed him towards what I thought was a safe bet and, seven years on, he's had three quarters of a decade of near-faultless motoring in his Honda CR-V. Moral of the story? If you want a reliable car, go for a Honda. Take the Civic - it should be able to take a couple of bikes if you fold those clever rear seats flat too.

Let us know how you get on

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Hi Colin,

There's not much to choose between the two in terms of overall talent, practicality or reliability, but my instinct would be to go for the Golf - that second generation Focus had a rather plain, unlovely cabin whereas the Golf's is much comfier and more welcoming - important stuff with a long regular journey like yours. The only other thing to consider would be the cabin space - if you often carry tall passengers in the back seats, then go for the Ford, it's much more spacious.

Let us know which you go for

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Hi Meeka,

I personally bought a 2006 Volvo V50 1.6 diesel, which is the estate version of the S40 so I know a little about them. I'm assuming that S40 is 1.6 diesel as well, as most are from that year. The most important thing about this engine is that it is used regularly at motorway speed (to burn off deposits on the diesel particulate filter - DPF) and that oil changes are also regular, and done with the right oil. Insist on a full service history and the more reputable the garage the better.

Make sure the DPF warning light is present when the ignition is turned on and that it then goes out soon after the car is started up. If it's missing completely it means there's a reason someone removed it - walk away.

Other than that I found the car to be very well equipped for the price, making it much better value than a similarly priced Focus or Golf from the same year. It's also more spacious than those cars - though not by much.

Let us know how you get on

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Hi Simon,

That’s absolutely top-value for a 2005 Focus, so the car would want to be in exceptionally good condition and come with a full and complete service history and a decent warranty to command that kind of price. You haven’t given us a year for your Polo so it’s rather difficult to value but we think you could potentially find better value on the Focus out there.

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Hi Richard,

There is lots of good choice out there in the compact saloon world, whether you're buying new or used. The Toyota Corolla, Volkswagen Jetta, Skoda Octavia, Ford Focus Saloon or Mazda3 Saloon all spring to mind and all make solid purchases. Just one thing - for pity's sake, don't buy another Aveo - not only is it cheap, nasty and bad to drive, but it was one of the worst-scoring cars ever on the EuroNCAP crash test.

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Hi Eimead,

Assuming your mechanic already tried HT plug leads and the actual spark plugs the next thing to look into would be injectors.

Hope you get to the bottom of your problem

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Hi Nicholas,

There is no government-funded scrappage scheme in place in Ireland at the time of writing (July 2014), but those that existed in the past were set up to encourage buying a new car, not a used one. Some car makers continue to use the term 'scrappage' for trade-in deals they are offering, but to our knowledge these also focus solely on new car purchases.

Hope that helps