aerodynamic performance
Technical term used in engineering, automotive, and aviation contexts to describe how well a shape moves through air.
This car has excellent aerodynamic performance, so it remains stable even at high speeds.
We tested the new aircraft's aerodynamic performance in a wind tunnel.
空気力学 is the field of aerodynamics, while 空力性能 specifically refers to the performance aspect.
Compound of 空力 (aerodynamic, from 空気 'air' + 力 'force') and 性能 (performance).