The Insignia is now cheaper to run after improving fuel economy and offering tax benefits, including up to 20 per cent cuts in BIK tax.
The 129g/km figure is a five per cent decrease in emissions for the Insignia Sports Tourer with the 2.0-litre Turbo engine, and as emissions have fallen below 130g/m, it becomes the first Insignia to be eligible for zero first year road tax this year.
The model falls under Vauxhall’s ecoFLEX signature, a low-CO2 alternative also available on the Astra, Corsa, Zafira and Meriva ranges.
As well as a drop in emissions, the Insignia ecoFLEX improves fuel economy from 54.3mpg to 57.6mpg on the combined cycle.
Vauxhall has maintained the same amount of power as before at 160PS and 350Nm of torque from 1750-2500rpm.
The eco-improvements continue with the 130PS and 160PS 2.0-litre CDTi engines in the Insignia range. Vauxhall has reduced noise and vibrations and significantly cut emissions for both units.
The 2.0 CDTi 160PS model now offers 10g/km less of CO2 emissions after recording official figures of 144g/km while the 130PS CCDTi cuts emissions by 11.5 per cent to 136g/km.
Fuel consumption is down by as much as 6.5 per cent on the diesel variations and hatchback and saloon body styles are subsequently available for 20 per cent less BIK tax.
The tweaked powertrains are available on Insignia models from today at no extra cost.