2017
Here's What It Would Take to Do 300 MPH In a Bugatti Veyron
https://www.roadandtrack.com/new-car...ph-horsepower/
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A standard, non-Super Sport Veyron has a drag coefficient of .36 Cd, the same as a Cadillac Escalade. That's why it needs 1000 horsepower to exceed 250 mph.
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2017
Chiron: The Inside Story of Bugatti's 1500 HP, 261 MPH Supercar
https://www.roadandtrack.com/new-car...-chiron-story/
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The car's drag coefficient is 0.38 in EB (standard) mode, 0.40 in Handling, 0.35 in Top Speed and 0.59 when the air brake is active.
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2021
The Bugatti Chiron Super Sport: A Hypercar With Creature Comforts
https://www.barrons.com/articles/the...ts-01623258186
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The Chiron’s tail was also modestly extended about eight inches to be more aerodynamic and provide a more slippery drag coefficient at very high speeds.
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Those extra 8-inches probably will not make up for all the air cooling requirements of the internal combustion engine.
If anyone finds a Cd for this car please post it.
EDIT:
I found the below on a site that has pop-up issues and possible spam issues so no link.
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the tuatara also has a more slippery shape, with a smaller frontal area than the chiron (1.672m2 vs 2.072m2 ) and a lower drag coefficient (0.279 vs 0.319 ).
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If the new Chiron does has a Cd of .32, that puts it in Porsche 911 territory.
For reference; the electric
Porsche Taycan is alleged to be Cd .22.