The Astra ecoFLEX 1.7 CDTi features a number of measures such as energy recuperation, adaptive aerodynamics and a lower ride height to reduce CO2 emissions by 20g/km or 17% compared to the Astra 1.7 CDTi 123bhp. Other features include a friction-reduced six-speed gearbox, a shift-indicator and a graphic-assist function to help drivers adopt the most fuel-efficient driving style.

Start/Stop technology has also been extended from the 1.3 and 2.0 CDTi versions of the Astra ecoFLEX and can be deactivated via a centre-console-mounted "eco" switch.

For the first time on a Vauxhall ecoFLEX model, an energy-recuperation system has been introduced. In addition, a clutch activates the air conditioning compressor only when it’s needed. Standard LED daytime running lights also reduce energy consumption.

Resultant benefits of the new technology include a 13% BiK tax bracket, a 100% first-year capital allowances plus exemption from TfL’s Congestion Charge and zero VED.

With 128bhp of power (5bhp up on the current highest output 1.7 CDTi) and 221lb.ft of torque, the ecoFLEX has also been designed to offer enhanced driveability.

The new Astra ecoFLEX 1.7 CDTi 130PS will be in showrooms from late this year, with pricing to be announced shortly. Three trim levels will be offered: Exclusiv, SE and SRi.