Our guide to greener buying explains all. We tell you what figures to look for, which cars to avoid and why the wrong choice could be costly.
So, if you want to go green but don’t know how, we’re here to help.
Greenhouse gas emissions
Look at the car’s carbon dioxide (CO2) emissions, firstly. This figure gives a good indication of its green credentials and the lower the emissions in grams per kilometre (g/km CO2), the better.
Find out your car's emissions here.
Tax costs
Road tax bands are heavily based on emissions, so a greener car is cheaper to tax.
Many cars with small, frugal engines and low emissions are completely free to tax– meaning you pay no vehicle excise duty (VED) per year – and London congestion charge exempt, too.
You can easily calculate your yearly car tax costs here.
Fuel thirsty
Another useful gauge of environmental friendliness is the car’s fuel consumption. It’s measured in miles per gallon (MPG), and cars with higher figures require refuelling less often.
As a guide, Honda Insight (00-05) is very frugal and returns 83mpg. On the contrary, the Aston Martin DB7 Coupe (94-03) only manages 12mpg.
Does your car measure up to our list?
 | City car | |
 | Small hatchback | |
 | Small family car | |
 | Large family car | |
| Small people carrier | |
 | Small 4x4 | |
 | Large 4x4 | |
| Large people carrier | |
Jargon busting
It's easy to be confused by motoring gobbledygook and dealerships can be daunting places as a result. That's why we've explained every puzzling term in our comprehensive glossary.
So, don't worry if you don't know your hybrid from your Bluetec. You're not alone and we've got everything you need to know here.
What if I don’t want to change cars?
You can also cut costs and go green without buying a new car. Try our seven steps to greener motoring and find out how to save a packet.
How green are you?
Use the Parker's carbon footprint calculator to find out how green you and your car are. Calculate my carbon footprint
