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Opel engineers were therefore able to increase the torsional rigidity that is important for precise chassis tuning. The Astra TwinTop body and underbody were reinforced to meet the particular demands of a cabriolet. The mechanism works with the roof open or closed. Simultaneously, two solid aluminum safety roll bars behind the rear seats deploy upwards and lock tight within 0.2 seconds. In the event of an impending roll-over, the control system activates the seat-belt tensioners. A special sensor in the airbag control system recognizes sudden vehicle turning motions. The Astra TwinTop features a solid windshield frame and active roll-over protection system as standard. The optional leather upholstery in stylish saddle brown look ideally suits the sporty elegant ambience, and is available for the Cosmo variant. At the touch of a button, the horizontally stacked roof parts in the car trunk are raised by around 25 centimeters. The inventive, power operated loading system "Easy Load" makes the trunk easily accessible. This also is of benefit when it comes to luggage volume, providing an ample 440 liters as a coupé and 205 liters with the top down. Engineers made this possible through the realization of an innovative three-part retractable roof system. These dimensions create a spacious interior and enable best-in-class shoulder and knee room. The Astra TwinTop is a slimline four-seat cabrio-coupé almost 4.5 meters long with a wheelbase of 2.61 meters. The top Cosmo variant features décor trim and inlays made from luxurious piano lacquer surfaces. Distinctive design elements in the cabrio-coupé's cockpit include the additional chrome rings for the air conditioning and radio controls. The Astra TwinTop Edition, as well as the versions with xenon or curve and cornering light are recognizable by their dark-tinted headlamp housings. For the exterior, the headlamp housings in stylish chrome look also convey an additional sense of quality. Both achieve the balance of more power with lower fuel consumption. The Astra TwinTop boasts two new, highly efficient 1.6-liter gasoline units in model year 2007, the 85 kW/115 hp and the 132 kW/180 hp engine. The fully-fledged four-seater is available with five gasoline engines (77 kW/105 hp to 147 kW/200 hp) and the especially powerful 1.9 CDTI common-rail turbo-diesel unit (110 kW/150 hp) with diesel particulate filter as standard. In addition to ESPPlus, one of the Astra TwinTop's standard safety features is the active roll-over protection system. Unique in this vehicle segment is the power operated "Easy Load" system, which allows bulky luggage to be easily loaded and unloaded, even with the roof open. Thanks to its intelligent, space-saving design, the Astra TwinTop provides passengers more room and a luggage compartment of up to 440 liters. It opens and closes at the touch of a button in less than 30 seconds, and can be operated while the car is in motion (up to 30 km/h).
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Launched in May 2006, it is one of the first cars in this class to feature an innovative three-part roof system.
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The Astra TwinTop is the dynamic, elegant coupé among cabrios. It also features a decent engine upgrade, balancing muscular appearance with some real power. Opel's Astra TwinTop is a classy looking convertible with four-seats and an electro-hydraulic steel roof, making it a more versatible cabriolet than most.