The new Vauxhall Corsa ecoFLEX emits just 98g/km CO2 which translates to 76.3mpg.
These figures are for the three-door model, and even the five-door version achieves 99g/km CO2.
This means both models are exempt from VED (Vehicle Excise Duty), and fall in the lowest 13 per cent BIK diesel band.
Both also come with a Diesel Particulate Filter (DPF) as standard, which dramatically reduces the most harmful emissions.
Despite the improvement in fuel consumption and emissions, the ecoFLEX produces 21 per cent more power from its 1.3 CDTi turbodiesel engine, its output rising 20 PS from 75 to 95PS over the existing 105g/km Corsa ecoFLEX.
Torque is also up by 20Nm to 190Nm, available at just 1750rpm.
To achieve this, the Corsa ecoFLEX 1.3 CDTi now employs a variable geometry turbocharger which significantly improves both performance and efficiency. To support the higher turbo pressure, the compression ratio has also been reduced from 18.0 to 16.8:1, while the injection system’s calibration has been revised to boost low-end torque and peak power.
As a result, the Corsa ecoFLEX’s performance is enhanced further, despite using taller gearing. It will now accelerate from 0-62mph in 12.3 seconds and reach a maximum speed of 110mph.
Using the chassis and aerodynamic modifications from the current Corsa 105g/km model, the new ecoFLEX also benefits from a 20mm lower ride height than standard and in Life trim gets 175/70 low-rolling resistance tyres on 14-inch steel rims (Club models get 15-inch steel rims with alloys as an option) and aero-optimised wheel trims. The model will be available in Life and Club trim only.
The new Corsa ecoFLEX will be the most economical Vauxhall model ever, and will be available to order from January 2010. Full pricing will be announced soon.