To find a potential value, you would need to consult:
* Independent automotive testing websites or publications: Some specialized automotive websites might have performed testing and reported the Cd. However, you'd need to search carefully and verify the source's reliability.
* Research papers or engineering databases: Academic databases focusing on automotive engineering might contain research data including drag coefficients for various vehicles. This would require substantial research effort.
In short, there's no definitive, easily accessible answer to your question.