The Green Car Guide to the most economical and lowest emission superminis on sale in the UK today. We list and compare the best supermini vehicles in diesel, petrol and electric categories, with full spec reviews and fuel economy data.
The Renault Clio returns 88.3mpg, equalling the Hyundai i20 and the Kia Rio, but it emits just 83g/km, which is 1g/km less than the Hyundai i20, and 2g/km less than the Kia Rio.
Hyundai i20 1.1 CRDi Blue 5 door 88.3 mpg
The Hyundai i20 offers great value, at launch it has the lowest CO2 emissions of any non-hybrid car.
Kia Rio 1.1 CDRi 1 EcoDynamics 88.3 mpg
The Rio is an excellent addition to the hugely competitive supermini market. With good looks, brilliant fuel economy, excellent safety kit as standard, a reassuringly solid feel and very competitive pricing.
The ECOnetic Fiesta uses an unfashionably large but highly efficient 1.6-litre turbodiesel engine which gives it good performance compared to super low CO2 rivals.
The Vauxhall Corsa is a regular best seller in the sales charts, offering low emissions, high economy, and low running costs.
In order to achieve the excellent fuel consumption Citroen has deployed two of its strong cards: diesel engines and engine stop start. There is also the Valeo i-StARS system which is a belt-driven starter alternator that replaces the starter motor.
The Peugeot 208 looks good both inside and out, is keenly priced, and the return of some driver involvement is long overdue, but for this specific model the fuel economy comes with too much of a compromise.
Skoda Fabia Greenline II 83.1 mpg
The Fabia is a thoroughly engineered car which has always blended practicality with affordability. In Greenline II guise it is also achieves stunningly low CO2 emissions too.
Toyota Yaris Hybrid T3 1.5 VVT-I 80.7 mpg
The hybrid Yaris is a miracle of modern engineering, offering very high official fuel economy. Unfortunately ‘fun’ and ‘Yaris Hybrid’ won’t appear together in print too often.
Thanks to the Fiat connection, the Ypsilon uses the characterful two-cylinder TwinAir engine which despite its diminutive size produces 85 bhp at 5,500 rpm.
Nissan Micra 1.2 DIG-S VISIA 68.9 mpg
As is now the norm in eco models the Micra also gets an intelligent alternator and engine stop/start. Under light load the engine also switches to the more efficient Miller Cycle.
Fiat Punto 0.9 TwinAir 67.3 mpg
It isn’t the most engaging supermini but it is stylish and the TwinAir engine adds a big slice of character, delivers good performance and has the potential to deliver great fuel economy.
Alfa Romeo MiTo 67.2 mpg
The Alfa Romeo MiTo is now available with Fiat’s TwinAir petrol engine which gives it high mpg and low emissions to go with the MiTo’s good looks and fun driving experience.
The Renault ZOE is a fully-electric supermini that is excellent to drive, cheap to run, and relatively affordable to buy.