C&D found higher drag coefficients than claimed by the manufacturers for the Prius and LEAF but confirmed the .28 and .24 claims of GM and Tesla for the Volt and Model S. GM claims the Spark EV gets .326. C&D's report of .312 for the Bolt seems plausible. Meanwhile, this report claims the Model 3 is aiming for .20 or less:Note that C&D number for drag coefficient are higher than what manufacturer's specified (Nissan claims .28 and Tesla .22). Therefore it's reasonable to assume that Cd of the Bolt would be .34 in C&D test.
Sources: Tesla Model 3 will have extreme aerodynamic design details | Electrek
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