Opel Astra ecoFLEX 5-door

From Opel press: The new five-door Astra ecoFLEX consumes just 3.7 liters diesel for 100 kilometers in the combined cycle. Its CO2 emissions of only 99 grams per kilometer make it the thriftiest and greenest Opel Astra ever. With 96 kW/130 hp, maximum torque of 300 Newton meters and six-speed manual transmission, the new green flagship of the compact class sets standards in performance and driving fun in Europe’s most important vehicle segment. Prices will be announced at market launch in the fall.

“The new Astra ecoFLEX is another milestone in Opel’s strategy for leading the industry in reducing fuel consumption and environmental effects while providing our customers with great performance and driving pleasure”,” says Karl-Friedrich Stracke, CEO of Opel/Vauxhall. “We will continue to pursue this strategy, which includes the launch of four new ecoFLEX models over the next six months, as well as the revolutionary electric Ampera that we will start to deliver by the end of the year”

In addition to the Astra ecoFLEX specific propulsion system with efficient thermal management, the package for the reduction of energy and fuel consumption – and thereby of carbon dioxide emissions – includes the intelligent recovery of electric energy through brake energy recuperation, active aerodynamic components and reduced rolling resistance. Altogether this has made it possible to reduce CO2 emissions (minus 20 g/km) and consumption (minus 0.8 liters/100 km) by 17 percent compared with the Astra 1.7 CDTI base model.

A new engine management system completely designed by Opel engineers for the 1.7-liter common-rail unit guarantees maximum efficiency. The maximum torque of 300 Nm is available at 2,000 - 2,500 rpm. The reduced compression ratio – combined with a new multiple injection system that carries out up to eight injections per cycle at 1,800 bar – improves the combustion process and reduces consumption. Also contributing to this is a new variable geometry turbo charger that provides especially precise boost-pressure control thanks to its additional positioner feedback sensor.

While all low-CO2 competitors are equipped with five-speed transmissions, the Opel Astra 1.7 CDTI ecoFLEX has a friction-reduced six-speed manual transmission especially tuned to the new engine. Another standard ecoFLEX component is the shift indicator. The illuminated gauge between the speedometer and rev counter shows the driver the ideal moment to shift up, while an additional graphic assist function helps the driver to adopt a fuel-saving driving style.

To ensure optimum electrical energy management, Opel introduces a braking energy recuperation system which recovers kinetic energy via the generator in engine overrun mode, converting this to electrical energy and feeding it into the battery. This happens automatically when the driver takes his/her foot off the accelerator pedal or presses the brake pedal. When the battery is sufficiently charged, the generator output is greatly reduced and the electrical energy consumers are powered in a fuel-saving manner by the buffered electrical energy. This relieves the engine from having to drive the generator when accelerating and thus reduces consumption and emissions.

In addition, a clutch only activates the air conditioning compressor when it is actually needed. The standard LED daytime running lights also reduce energy consumption.

Gallery: Opel Astra ecoFLEX 5-door