C-segment top class performance with styling to match, a pleasant interior and high safety performance. To realize a deep fusion between these goals, Honda completely redesigned the body frame. Aiming to realize a frame rigid enough even for the Type R, CAE analysis was used in conjunction with effective placement and bonding of high tensile steel materials, resulting in 25% higher torsional rigidity while reducing weight by 22kg. A lower center of gravity, advantageous for performance and styling, and lower inertia to reduce front and rear weight, were also pursued.
With its coupe-like proportions, the new Civic realizes outstanding aerodynamic performance down to the body frame level. Furthermore, Honda pursued the reduction of the air resistance coefficient (Cd) to improve fuel efficiency, and optimization of the lift coefficient (Cl) for better mid- to high-speed stability. Through computational fluid dynamics (CFD) analysis and repeated wind tunnels tests, Honda identified key areas which were highly effective, and in conjunction with the design team implemented measures and realized excellent Cd. Cl, which seemingly opposed Cd, is balanced at a fundamental level.
Honda aimed to realize D-segment level cabin quietness, to create a comfortable cabin for even long drives. The high-rigidity body frame suppresses vibrations which cause cabin noise. Low frequency noise was reduced especially in the front, and as heavy damping materials were no longer needed, effective placement of lightweight sound absorbing materials and sound insulation to prevent road noise realized superior cabin quietness.
Noise-reducing wheels, using hollow resonators wrapped around the center of the wheel, suppress unwanted resonance caused by, for example, driving over periodic bumps on a highway, or rough roads.
Chassis performance was honed for the feel of security and fun handling at any speed range, even at high speeds on the Autobahn. Newly developed front suspension with a high geometry rigidity and multi-link rear suspension, and a dual pinion variable gear ratio EPS contribute to a deep fusion between handling and stability.
Hydraulic compliance bushes help with the Civic’s sophisticated ride. The engine mount was optimized to position the heavy engine lower and further back, contributing to a low center of gravity and low inertia.