with coil springs instead of torsion bars and asymmetrical bushings to promote rear-wheel toe-in during deceleration. Further security comes from a new braking system that incorporates Bosch ABS and beefy four-piston aluminum calipers squeezing large ventilated brake rotors at all four wheels.

Although the new car retains the familiar 911 appearance, several refinements have been included to reduce aerodynamic drag and lift. The new floorpan is notably smooth underneath, the more rounded bumpers improve airflow above and below the body, carefully designed

air intakes create less drag, and a retractable rear wing extends automatically at 50 mph to reduce high-speed lift. To gether, these measures reduce the drag coefficient from the 0.39 of a regular Carrera to 0.32.

The largest, most powerful normally aspirated flat six Porsche has ever built motivates the new car. Still an air-cooled two-valve design, the new engine gets enlarged bore and stroke dimensions that yield a 3600cc displacement. Redesigned combustion chambers with a lofty 11.3:1 compression ratio and twin spark plugs extract maximum energy from

each intake charge. A sophisticated electronic engine-control system with sequential port fuel injection and dual knock sensors handles spark timing and fuel delivery. A new intake manifold with variable resonance characteristics maximizes cylinder filling over a broad rpm range, ceramic exhaust-port liners promote rapid catalyst warmup, and the new muffler collaborates with a quieter cooling fan and increased insulation to reduce engine noise dramatically. The result is an engine that produces 246 hp at 6100 rpm, 229 pound-feet of torque at

4800 rpm, and more than 190 pound-