Choosing a green car isn't just good news for the environment, but it should also be cheaper to run thanks to lower fuel consumption and carbon dioxide emissions.
With an engine stop-start system, the high-quality Audi A4 can add fuel efficiency and lower emissions to its list of credentials. With a 3327 discount, it's even more appealing. Find the Audi A4 2.0 TDI S/S 170 Executive SLine at Uknewcars.co.uk for 25,138.
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BMW 3 Series Convertible
We reckon this is one of the best coupe-cabrios you can buy, and the diesel engine is a clean, economical performer. The BMW 325i SE Convertible is discounted by 4152 at Motorlogix.com, where it's on sale for 29,628.
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Citroen Grand C4 Picasso
The Grand C4 Picasso offers great all-round family transport, with seating for seven. With the 1.6-litre petrol engine, it's pretty economical, too. Drivethedeal.com is offering 2290 off the 1.6 THP 150 Exclusive EGS model. You'll pay 19,365.
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Ford Mondeo Estate
This clean, green Mondeo is the most economical estate in the range, although it's also expensive to buy. A 5610 discount could sweeten the deal. Check out Drivethedeal.com, where the Ford Mondeo 2.0 TDCi 115 Econetic Estate is 16,435.
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Kia's Cee'd Ecodynamics model has an engine stop-start system to reduce emissions and boost fuel economy perfect if you do a lot of town driving. Save 2400 on the Cee'd 1.6 CRDi 89 Ecodynamics 2 five-door at Mkkia.co.uk, where it's 11,795.
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The Lexus RX hybrid is the environmentally acceptable face of SUVs. As well as low emissions and low running costs, it's also hugely luxurious. The 450h SE Nav model is reduced by 3132 at Drivethedeal.com, leaving you to find 40,438.
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Mercedes-Benz's Blue Efficiency models are economical to run, while still delivering plenty of power. The Mercedes E250 CGI Blue Efficiency Sport saloon is reduced by 2595 at Carfile.net to 30,760.
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Engine stop-start technology helps this model return nearly 50mpg, if not sparkling performance. Find the Toyota Auris 1.33 VVT-i Stop&Start TR three-door discounted to the tune of 11,600 at Drivethedeal.com, a saving of 2465.
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The Ecoflex version of the Zafira is the only one to average more than 50mpg and emit less than 140g/km of CO2. Autobytel.co.uk is offering nearly 3000 off the 1.7 CDTi 110 Ecoflex Exclusiv model, so you'll pay 15,795.
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This stylish hatchback is cheap to run thanks to great fuel economy and low emissions. It's also discounted by 2065 at Coast2coastcars.co.uk, where the Volvo C30 1.6D DRIVe R-Design is on sale for 15,6880.
Find the Volvo C30 deal here