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How is the chassis different from that of a standard 8 Series coupe?

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How is the chassis different from that of a standard 8 Series coupe?

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The 850CSi’s chassis is based on that of a normal 8 Series and thus is made up of MacPherson struts in front and a multi-link system that comprises five components (upper transverse link, two lower transverse links, longitudinal link and integral link) in the rear. However, BMW Motorsport specified stronger front hubs, stiffer shocks and shorter springs (by 10mm) for the 850CSi. In addition, all Euro-spec cars are fitted with Active Rear-Axle Kinematics (known by its German abbreviation AHK for Aktive Hinterachs-Kinematik). The system works by turning the rear wheels in the same direction as the fronts in order to facilitate change of direction and weight shift in a corner. The hydraulically-controlled AHK system activates at speeds above approximately 60 kph (37 mph) and can turn the rear wheels up to 2.5 degrees depending on the angle of the front wheels.

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