This is the third generation of Golf BlueMotion, and it has evolved quite a bit since it was introduced in 2007:
"At that time, the Golf BlueMotion set new standards for sustainability with a fuel consumption value of 4.5 l/100 km (119 g/km CO2). In 2009, Volkswagen showed the second generation Golf BlueMotion, also in Geneva (as a concept car); its fuel consumption had been reduced to 3.8 l/100 km (99 g/km CO2); first deliveries of the production version of this Golf BlueMotion were made in October of the same year. The fact that fuel consumption for the third Golf BlueMotion could now be reduced by another 0.6 litres or 15 per cent and CO2 emissions by 14 grams per km is a reflection of continuous technical progress. Given its 50-litre fuel tank and 3.2 l/100 km fuel consumption, the new Golf has an astonishing theoretical range of 1,562 km. Given an average annual driving distance of 15,000 km, most drivers will only have to refuel this Volkswagen ten times per year"