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The front and rear suspension of the e-tron GT uses air springs for a smoother, controlled ride than the S90, which uses coil springs in front and transverse leafs springs in the rear. Air springs maintain proper ride height and ride more smoothly.
The e-tron GT has a standard automatic front and rear load leveling suspension to keep ride height level with a heavy load or when towing. The e-tron GT’s height leveling suspension allows the driver to raise ride height for better off-road clearance and then lower it again for easier entering and exiting and better on-road handling. The S90 doesn’t offer a load leveling suspension.
For better handling and stability, the track (width between the wheels) on the e-tron GT is 3.3 inches wider in the front and 1.9 inches wider in the rear than on the S90.
The RS e-tron GT handles at .95 G’s, while the S90 pulls only .88 G’s of cornering force in a Motor Trend skidpad test.
The RS e-tron GT executes Motor Trend’s “Figure Eight” maneuver 2.2 seconds quicker than the S90 (24.1 seconds @ .85 average G’s vs. 26.3 seconds @ .68 average G’s).
For better maneuverability, the e-tron GT’s turning circle is .6 feet tighter than the S90’s (38.1 feet vs. 38.7 feet).