how many valves
The 944 uses a more conventional inline four-cylinder, available in both naturally aspirated and turbocharged form. The engine displaces 2.5 liters and has a single overhead cam. With bore and stroke of 3.94 inches by 3.11 inches, the engine has eight valves and a 9.7-to-1 compression ratio. Power output is 147 horsepower at 5,800 rpm and 140 foot-pounds of torque at 3,000 rpm. The Turbo's engine is closely related, having the same basic specs save for its lower 8-to-1 compression ratio to compensate for the turbocharger's boost. With the addition of the turbo, the 2.5-liter outputs 217 horsepower at 5,800 rpm and 243 foot-pounds of torque at 3,500 rpm.
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