Thanks to excellent aerodynamics as well as highly efficient new engines and transmissions, the new generation Opel Astra sets standards for efficiency and low emissions. Compared with the previous model, CO2 has been cut by up to 19 per cent, putting the Astra at the top of the compact class. The current Astra generation already ushered in a new era at its premiere and was elected European Car Of The Year 2016. With its lightweight design (200kg lighter than the predecessor) and top technologies from higher classes, the Astra set benchmarks. Opel continues to pursue this strategy with ultra-modern new generations of highly efficient and lightweight petrol and diesel engines. The 1.2-1.5-litre three-cylinder power units produce 77kW (105hp) to 107kW (145hp), making both the Opel Astra five-door and Sports Tourer real fuel-saving and CO2 champions. A counter-rotating balance shaft in the block of the three-cylinder engines offsets vibrations. The base power units already have a six-speed manual gearbox as standard. A smooth-shifting nine-speed automatic is optional.

Meticulous development in the wind tunnel also made a significant contribution to the reductions in fuel consumption and CO2 emissions. As a result, the new Opel Astra is one of the most aerodynamic compact cars on the market.

At 0.25 Cd, the Sports Tourer belongs to the estate cars with the lowest drag coefficient in the world, while the five-door leads the hatchback class at 0.26 Cd.

The aero-benchmarks have been achieved through numerous measures, including an engine compartment cover, deflector-shaped rear axle control arms and a full-face shutter. The upper and lower portions of the new Astra's radiator grille automatically open and close independently of one another, further improving the frontal airflow. The underbody optimisation improves the drag coefficient by reducing turbulence.