|The Opel Astra 1.7 CDTI ecoFLEX.|
The Corsa 1.3 CDTI version has a fuel consumption rating of 4.1 L/100km (57.4 mpg US), with CO2 emissions of 109 g/km. The Astra 1.7 CDTI version has a fuel consumption rating of 4.5 L/100km(51.3 mpg US) with CO2 emissions of 119 g/km. Both cars are fitted with a maintenance-free diesel particulate filter as standard.
With improved engine control and lower vehicle weight, Opel reduced fuel consumption and CO2 emissions of the Corsa 1.3 CDTI ecoFLEX by around 9%. On the Corsa, the calibration of the 1.3 CDTI engine is optimized and adapted to a longer transmission gear ratio.
To improve its aerodynamics, the car is lowered by 20 mm, air intakes are optimized and wheels are fitted with newly designed, more effective wheel caps. The Corsa ecoFLEX is also equipped with special roll resistance optimized smaller tires: 175/70 instead of 185/70, fitted to lighter—flow formed—14” steel wheels.
Engineers paid extra attention to the weight reduction, shaving off 45 kg (99 lbs). The optimized wheels and tires, for instance, allowed to reduce weight by 7.2 kg (15.9 lbs) alone.
The Corsa ecoFLEX is available with five-speed manual transmission as a three-door model in the equipment variants Corsa and Edition. Its performance figures are similar to its predecessor: 55 kW/75 hp output, maximum torque of 170 Nm (125 lb-ft) and a top speed of 168 kph (104 mph).
The new Astra 1.7 CDTI ecoFLEX is available as five-door, three-door and station wagon models which come with a six-speed manual transmission. The 1.7 CDTI common-rail diesel has maximum output of 81 kW/110 hp, torque of 260 Nm (192 lb-ft) at 2000 rpm and a top speed of 188 kph (117 mph).
GM engineers modified the Astra 1.7 CDTI with a longer axle ratio, optimized the engine management system and reduced the engine idle speed. The curb mass of the new Astra ecoFLEX has been reduced by 30 kg.
Moreover, engineers improved aerodynamics by lowering the chassis, optimizing the front air intake and including a drag reducing lower engine compartment panel. They also reduced the power steering pump idle speed and fitted low rolling resistance 15-inch tires (16-inch optional).
The two cars will be available before the end of 2008. In summer 2009, Opel also will introduce the ecoFLEX version of the new top model Insignia.