Bluemotion vs Efficient Dynamics

Ten years ago, carbon dioxide was a relatively harmless gas. But now, if the doom-mongers are to be believed, a rising level of CO2 in the atmosphere is the greatest threat our planet faces. As a result, the spotlight has been turned on polluting cars and the people who drive them.

Yet it’s not only environmental concerns that are persuading firms to build cleaner models. The fact buyers are taxed more heavily if they choose a motor with higher emissions has also spurred them into action.

So, if you opt for a cleaner car, do you need to sacrifice performance and desirability? Not according to Volkswagen and BMW. The former is drawing on the success of its Polo Bluemotion by launching a raft of similar models, and the Golf is the latest to arrive. Powered by the familiar 1.9 TDI diesel, the newcomer is offered in standard or Match trim.

BMW follows a rather different approach. Instead of marketing specific low-emissions models, it has fitted its Efficient Dynamics package across the 1-Series range, and the 2.0-litre 118d is the cleanest of the lot. In SE trim, it’s £4,000 more than the VW, but has a power advantage.

They’re more closely matched elsewhere. Both return official combined economy of 62.8mpg and emit 119g/km of CO2, which means road tax of £35 a year and low company car charges. Tempted? Then let’s see which eco model makes the most sense.