You can tell a great sports coupe by the way it covers the bases, all tour ot them. Aerodynamic styling. A superb ergonomic design. Agile handling. And responsive power. The powertrain engineers job in the design of a dynamic sports coupe is clear: Iniect as much ot a precisely metered mixture ot tuel/air as possible, and as quickly as possible, into each cylinder. Burn it evenly and rapidly. Then Probes multi-port release the exhaust with fuel-injected I-4 and V-6 engines feature the free-breathing The whole idea here 4-valve-per-cylinder design with dual overhead cams. power trom every drop comparable efficiency. is to extract optimum ot tuel. and to deliver responsive power and torque over the complete pertormance range trom accelerating oti the line to passing at highway speed. The design that puts this idea into motion is the one long embraced by designers ot racing engines: tour valves per cylinder (two tor intake and two tor exhaust) and belt-driven twin overhead camshatts lone activating the intake valves and the other the exhaust valves). The treerbreathing tour valves (versus twoi deliver a higher flow and velocity ot fuel/air into and out ot the cylinder and promote greater rapidburn combustion, resulting in higher power output. And the valves, each smaller and lighter, permit the use of low-tension springs. enabling the engine to reach higher rpm more quickly. -.,_....,_M~.,._w.