Mechanical Engineering · Project 01

Regera Model and Simulation

YearFall 2025
SoftwareSiemens NX
TeamIzrahiah Immanuel, Parth Patel, Jonathan Vollrath

This project is a parametric CAD model and simulation study of the Koenigsegg Regera, a 1,500-horsepower hybrid grand tourer with only 80 units produced from 2015 to 2022. Working in Siemens NX, I built the model from reference images, scaling them to one another and aligning them to the datum of the main assembly. I traced modeling curves over the images and built the body as a full surface model using lofted, curve mesh, fill, ruled, and studio surfaces, then sewed and thickened the surfaces into solid bodies. The wheels follow the car’s staggered setup of 19-inch wheels in front and 20-inch wheels in the rear, and I brought all the parts together in a full model assembly. Using the finished model, I ran a CFD wind tunnel study at the car’s 250 mph top speed to find its drag coefficient, which published sources put between 0.32 and 0.37.

3D CAD model of the Regera, front three-quarter view
Completed surface model, front three-quarter view
Rendered side profile of the Regera model
Side profile of the full model assembly
Rendered rear view showing the diffuser and rear wing
Rear end, showing the diffuser and rear deck wing
Top view of the Regera model
Top view of the surface model
CFD airflow streamlines around the model, colored by velocity in mm/s
CFD wind tunnel study at 250 mph, with streamlines colored by velocity (mm/s)
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