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There has been a lot of debate about the benefits of hybrid cars, but few would disagree that they are a step in the right direction. The principle of the current crop of hybrids, for those that don't know, is that a standard petrol engine is combined with an electric motor, with the result being better fuel consumption and lower emissions. The original Toyota Prius was the first mass-produced hybrid on sale and Toyota has just released the third generation of the model and it promises to be more refined and cleaner than ever.

There are other alternatives such as the Honda Civic Hybrid, which isn't bad either, or the Honda Insight, while at the top end of the scale Lexus does three hybrids, the GS 450h, the LS 600h and the RX 450h. In the case of the Lexus hybrid technology it's as much about giving the cars higher performance as it is increasing efficiency.

A hybrid is cleaner in so far as official emissions figures are very low. The Prius emits less then 90g/km, which will make it the cleanest petrol car on sale in Ireland. In some cases you could get better fuel economy from a diesel engine though.

With a budget of €40,000 you could easily get into the new Prius when it arrives in October, as the car is expected to cost about €28,000 and this will be a very cheap car to run, so it seems the natural choice. Bear in mind that even cleaner technologies will arrive soon, including those in the Opel Ampera and even a new plug-in version of the Prius.

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Hi Alison.

As your car is ten years old this year scrappage seems like the right solution and there are some amazing discounts on offer in addition to the Government's current incentive. The cars you mention are three of the best superminis on the market and because you use the car for quite a lengthy commute a diesel could be the best solution for you.

All three of these cars have diesel options. Opel's Corsa comes with a 1.3-litre 75bhp diesel with emissions now down from 119- to 114g/km. Prices for this start at €15,905 for the three-door version.

The Mazda2 is another very good option. With a 1.4-litre 68bhp diesel, emissions are just 114g/km so again you pay road tax of just €104 per year. The Mazda2 diesel starts from €15,930.

The Fiesta also has a 68bhp 1.4-litre diesel engine and emissions of 110g/km and this starts at €16,645.

All three of these cars qualify for the Government Scrappage Scheme, so would get a discount of €1,500. Much of the additional discounting available on any of these models is on the petrol models however, as dealers try and clear stocks of slow-selling petrol versions.

Of all these three cars the Mazda and the Fiesta are better cars so it would be down to these two in our opinions. We like the Mazda2 a lot, but we'd still say buy the Fiesta based on its looks and the way it drives. The Fiesta has been the outstanding small car over the last few years so if budget allows it is the car we would chose.

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Hi Paul.

It's true, Lada's owners, which include the Renault-Nissan alliance, have said that it makes sense to bring the brand back to this side of Europe. If that happens it's also likely that the cars will be made in right-hand drive for the UK and Ireland.

I agree it'll take some marketing genius to turn around the image side of things, but bear in mind that Skoda was once seen as no better than a Lada - and look at it now.

The reasoning behind all this is apparently to beat the Chinese car makers to it. Renault-Nissan will be represented at the super-cheap end of the market by Dacia and Lada before the likely arrival of a handful of Chinese manufacturers.

Whether they'll be successful in Ireland or not remains to be seen. You reckon that the budget end is already pretty busy? Maybe there's room for new cars at an even lower price.