Ground clearance is a measurement of the distance between the ground and the undercarriage]of a vehicle. It is usually shown as the front to back ground clearance in the lateral center, since on many vehicles upon which it matters the differential is the lowest point, a typical characteristic of vehicles with a live axle.
A strut tower brace is a device which goes between the strut towers of an automobile. It helps to maintain parallelism between an imaginary line drawn between the [strut] towers, and the front cross member, and helps keep the line between the strut tower brace and the point beneath it vertical in relationship to the vehicle's base. This enhances stability while cornering, and reduces understeer. Sometimes also called a strut tower bar.
The multilink suspension design is the most advanced and functional independent rear suspension|independent rear suspension available for an automobile. It has all of the features of the double wishbone, but takes less space, generally weighs less, and is potentially more adjustable, especially if adjustable links are used. The idea of the multilink suspension is to use several short links to ensure that camber, caster and toe either do not change or change predictably when the suspension is compressed or extended.