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GoAuto glossary

Cd

Technically, it should read cD, and it’s the scientific code for “co-efficient of drag”, or the resistance of an object moving through the air.

The lower the figure (anything under 0.30 is ultra-low) the more easily it cuts through the air without causing undue drag or resistance.

This will help fuel economy on the highway because the engine works less hard to overcome air resistance.

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