For the first time since the 911's introduction over 30 years ago, the
windshield has been reprofiled, raked more steeply at 55 degrees versus
60. Complemented by a more gradually sloping roof line and retractable
rear spoiler, the sleeker profile proved essential in hitting the New
911's aerodynamic target -- a low .30 coefficient of drag.Details like the headlights, which not only provide a family tie to the Boxster but fit seamlessly with the hood and fender contours, were also elemental to achieving the New 911's slippery shape. As were bumpers integral with the body. And the side-view mirrors which attach at the apex of the A-pillar rather than to the door, following the flow of air over the fenders.
Even the underbody has been reshaped to reduce drag and, more importantly,
minimize aerodynamic lift. A low .05 degree of lift on the rear axle,
aided by downforce generated by the retractable rear spoiler, helps
ensure the rear wheels remain firmly planted. In front, a slightly
greater .08 degree of lift takes the edge off the 911's sensitive
steering for greater control at high speeds.
Cornering stability is also aided by the new lightweight chassis structure. Modeled after our racing designs, the spaceframe-like chassis' employs a complex of lateral and longitudinal supports. Augmented by integrated high-strength body panels, the new structure sports a 45% increase in torsional stiffness and a 50% increase in bending stiffness resulting in more predictable handling.
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