The Bugatti Tourbillon's standout feature is an 1,800-hp plug-in hybrid powertrain built around a high-revving V-16, but Bugatti didn't forget about the aerodynamic work needed to make use of the immense power on tap. The goal was to surpass the Bugatti Chiron in slipperiness, Paul Burnham, chief engineer for the Tourbillon, said in a video posted on Bugattis' YouTube channel Thursday. A major change compared to the Chiron is the Tourbillon's smaller greenhouse, which reduces the new car's frontal area. But much of the development work focused on smaller details in order to optimize airflow across all surfaces. Bugatti Tourbillon aerodynamic testingAerodynamic development work started with computational fluid dynamics (CFD) simulations, before moving to wind-tunnel testing.