Good week, bad week: March 12

* Good news for the planet * Bad news for Surrey * Great week for wind-in-your-hair motoring...

Good week, bad week: March 12

It's been a good week for driving with the top down, but a difficult seven days if your name is Andrew Humberstone.

Audi R8 Spyder
We've reviewed Audi's sensational new R8 Spyder and reckon it's as close to perfect as you're likely to get with its roof up or down.

If you've got 111,995 to spare it's an excellent way to invest your cash. If not, well, there's always the lottery.

Petrol or diesel?
If your budget falls short of a new Audi R8 Spyder, we've introduced a new tool on to help you decide whether a petrol- or a diesel-powered car will be cheaper for you.

Good times for the planet
It's also a good week for average new car CO2 emissions, which have plummeted as motorists tighten their belts and choose more economical cars.

The findings come in a new report from the Society of Motor Manufacturers and Traders, which reveals the scrappage scheme has also helped to slash emissions at their fastest-ever rate since records began.

A sorry week for Surrey
Things don't look so healthy in Surrey, which has the most potholes of any county, according to a survey by Kia.

Surrey County Council rubbished the report, but not because it thinks it doesn't have a lot of holes instead, the council claims it has far more than Kia reckons. At least it's fixed 15,000 since the end of the cold snap.