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They have a lot in common.
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Posted by B Millar [Email] (#1109) [Profile/Gallery] (more from B Millar) on Tue, 29 Dec 2009 10:56:01 Share Post by Email
In Reply to: Re: How different is the 9-5 from the Opal Insignia?, NDS, Tue, 29 Dec 2009 10:37:14
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The Insignia is on the Epsilon II platform, and the 9-5 is on an extended Epsilon II platform. They have similar suspensions and drive trains and share TONS of parts under the skin. I think I heard that 80% of everything you touch and see is designed and made specifically for the 9-5, but a lot isn't. I'm sure they share interior bits like window switches and rear view mirror and electronic control modules. The key is the same I think.

The 9-5 has some stuff unique to it though. One thing for sure is the HiPer H-Arm suspension. This is from the press release:

HiPer Strut and Linked H-arm suspension

Three different suspension combinations are fitted to the Saab 9-5. Variants with the 1.6-litre petrol and 2.0-litre diesel engines have a McPherson strut front and 4-link rear arrangement, while a Linked H-arm rear suspension is fitted with the 2.0-litre petrol turbo, and XWD variants. Aero variants with the 2.8V6 Turbo have a HiPer Strut (High Performance Strut) front suspension and the Linked H-arm rear layout.

The advanced HiPer Strut offers driving benefits similar to those of a double wishbone layout, but without any weight penalty. The inclination and length of the kingpin is reduced and the caster angle of the steering increased. The result: improved steering quality with a more secure driving feel, as well as enhanced handling and braking characteristics.

At the rear, the sophisticated H-arm layout, with isolated sub-frame mountings, gives still greater ride comfort, reduces vibration entering the cabin and improves roadholding. For both H-arm and 4-link rear suspensions, shear bushings are used in the damper mountings to the body structure. These effectively dissipate vibrations from the road, improving ride comfort and noise isolation.


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