The new generation Opel Astra rolls much more light-footed to the IAA (September 17 to 27): Depending on the model and equipment, the compact has slimmed down by up to 200 kilograms, in any case it is 120 kilos lighter than its predecessor. The engineers have saved weight in various disciplines.
What is crucial is the streamlined vehicle architecture, which alone reduces the weight of the body shell and structure by more than 20 percent from 357 to 280 kilograms. The engineers save another 50 kilograms by using high-strength and ultra-high-strength steels, among other things. They also do without the underbody paneling in favor of aerodynamically optimized chassis and drive elements.
In addition, for example, the exhaust system also saved (-4,5 kilos). The wheels and tires are one size smaller and weigh up to 11,5 kilos less. The brakes, which are smaller due to the lower weight, are ten kilos lighter with higher braking power.
In terms of engine technology, too, lightweight construction has found its way: For example, the aluminum engine block of the new 1,4-liter turbo gasoline engine is ten kilos lighter than the cast steel counterpart of its predecessor. Modern gearboxes save the same value.
In addition to the lightweight construction efforts, the new Astra generation has shrunk somewhat on the outside: At 4,37 meters, the five-door hatchback is almost five centimeters shorter than its predecessor, the height increases by 2,5 centimeters, the width by half a centimeter from. However, according to Opel, the available space has increased measurably, thanks in part to the more compact and - of course - lighter seats.
The weight savings should benefit both agility and consumption. Opel reports a consumption of 77 liters per 105 kilometers for the 1,0 kW / 4,2 hp 100 liter three-cylinder.
Author: Hanne Lübbehüsen / SP-X