Vauxhall has launched low-emission versions of the Vauxhall Insignia Sports Tourer which results in lower benefit-in-kind tax bills compared with standard models.
The new models, badged ecoFLEX, are available on 160bhp versions of the 2.0 CDTi model at a £500 premium, but the lower emissions result in a four percentage point reduction in BIK tax rates.
The standard 160bhp diesel Sport Tourer has CO2 emissions of 159g/km, compared with just 139g/km for the new ecoFLEX model.
It means that choosing the equivalent ecoFLEX version over a standard model could result in an annual BIK tax saving of about £300 for a 40 per cent tax payer.
Aerodynamic changes have been made to improve the car's fuel consumption and reduce CO2 emissions, with modified air intakes and underbody spoilers.
Fuel consumption on the combined cycle is stated as 53.7mpg, up from 47.9mpg on the standard model.