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GM's British arm, Vauxhall, has introduced a new eco-friendly version of the Insignia to the UK market. The Insignia ecoFLEX is powered by a 2.0-liter CDTi diesel engine that produces 160HP and 350Nm from 1750-2500 rpm, with overboost to 380Nm. This is the same engine used in the standard 2.0 CDTi model, however, thanks to a series of fuel-saving measures that include improved aerodynamics and the use of low resistant tires, the ecoFLEX achieves a combined fuel economy figure of 54.7mpg UK (45.6mpg US or 5.2lt/100km), or 10 percent improvement over the 2.0 CDTi.