2006 Honda Civic Body

Advanced Personal Compact with ACE Body Structure

8/31/2005 7:47:31 PM


The 2006 Honda Civic follows a futuristic and high-tech "Advanced Personal Compact" design theme that incorporates a sweeping roofline and ultra-sleek windshield angle that highlights the vehicle's one-motion profile, low and wide stance, and exceptionally aerodynamic shape. The 2006 Civic is available as either a sedan or a coupe, and each variation exhibits 100 percent unique exterior sheet metal and unique proportions such as wheelbase, overall length and height. The sedan becomes more sophisticated and upscale as the coupe becomes sportier.

A major safety innovation includes the introduction of the Advanced Compatibility Engineering(TM) (ACE)(TM) Body Structure that builds on the Civic's already class-leading reputation for safety performance. Further innovations consist of sleek aerodynamics, small wheel openings that minimize the gap between the tire and the body, and ultra-tight body panel fit. Torsional rigidity increases by 35 percent.

Body Summary
  • All-new platform with longer wheelbases (106.3 in. sedan / 104.3 in. coupe)
  • New exterior dimensions are 1.4 inches wider
  • ACE Body Structure added for enhanced frontal collision safety between vehicles of different sizes
  • Torsional rigidity increases 35 percent
  • Minimal wheel opening gaps between tire and body
  • Extensive use of high strength steel
  • Less noise and vibration
  • Unique styling for Civic Si and Civic Hybrid models differentiate model leaders
  • Expanded selection of colors
  • Opposable windshield wipers
  • Composite and zero evaporative emissions fuel tank (Civic Hybrid)

Each body style has its own unique character. As the performance leader for the lineup, the Civic Si and Civic Coupe convey an aggressive attitude that speaks to the performance potential underneath. The steeply raked windshield creates a 21.9-degree angle that is even sleeker than the 23.9-degree angle in the Acura NSX supercar. The long trunk deck, with its frontward sloping bumper, accents the forward motion conveyed by the overall vehicle shape. A muscular lower body with proportionally short front and rear overhangs express a powerful stance and a low center of gravity.

The Civic Hybrid and Civic Sedan meld high technology with a futuristic, sporty and sophisticated style for an ultra-modern, 21st century presence. Its monoform design with a long wheelbase and short overhangs emphasize strength and agility.


Compared to its predecessor, the 2006 Civic Sedan has grown 1.4 inches in overall length (176.7 inches) and 1.5 inches in width (69.0 inches). Its 106.3-inch wheelbase is 3.2 inches longer, while the rear overhang is 3.1 inches shorter and the front overhang is 1.8 inches longer. Height has been reduced by 0.2 inches. The front track is 1.1 inches wider (59.0 inches) and the rear track is 2.2 inches wider (60.1). Vehicle weight has increased by approximately 4 percent on each trim level - a relatively small gain considering the addition of extensive standard safety equipment, new features and greatly increased bending and torsional rigidity.

The 2006 Civic Coupe has been reduced 0.6 inches in overall length (174.8 inches) compared to the 2005 model, and is now 1.4 inches wider in width (68.9 inches). Its coupe-exclusive 104.3-inch wheelbase is 1.2 inches longer, while the front and rear overhang lengths remain unchanged. Overall height has been reduced by 3.2 inches. The front track is 1.1 inches wider (59.0 inches) and the rear track is 2.1 inches wider (60.1). Like the sedan, vehicle weight has increased by approximately 4 percent on each trim level.

Next Generation Global Compact Platform

The Civic is built on an all-new version of Honda's Global Compact Platform. The solid unit body of the Civic was designed from the outset to define a new standard for torsional and bending rigidity in the compact segment. The new Global Compact Platform implements advanced body construction technologies for enhanced safety, better rigidity, improved ride comfort and a quieter cabin. Advanced new structural engineering and manufacturing methods utilizing 50 percent high-strength steel, of which 38 percent is high-grade (590MPa), results in a torsional rigidity increase of 36 percent, even as the wheelbase and width have grown. The body structure, including the important mid-floor cross members and floor gussets, are also made of high-grade high-strength steel. The longer wheelbase serves to increase its stability during straight-line running, as well as when braking and turning.

The Civic features a 4-wheel independent suspension system that, for 2006, has been completely reengineered to provide even more agile handling and refined ride comfort. Up front, the Civic features a compact Control-Link MacPherson Strut suspension for outstanding handling, ride and packaging. The Control-Link MacPherson Strut design delivers quick, responsive handling by helping to maximize each front tire's contact with the road throughout the range of suspension travel. In the rear, the Civic is equipped with a double-wishbone multi-link suspension that helps provide a smooth ride, excellent handling, and good cargo space. (See the Chassis section for more details on the suspension.)

ACE Body Structure and Related Safety Construction

Body construction now includes Honda's Advanced Compatibility Engineering(TM) (ACE)(TM) Body Structure that enhances frontal collision energy management through a network of load bearing structures in the front of the vehicle. This newly developed front-end frame structure (similar to the all-new 2005 Honda Odyssey ACE Body Structure) incorporates new upper and lower frame members to significantly enhance energy dispersion in a frontal collision throughout the upper and lower load bearing channels in the body. The ACE concept differs from traditional crash designs that guide a high percentage of collision force through a vehicle's two lower channels in a collision. The ACE design with its polygonal front structure helps reduce the potential for misalignment with the frame of the opposing vehicle. Taken together, these features are designed to increase compatibility between vehicles of different size categories for enhanced occupant protection in the event of a collision.

The Civic's ACE body structure is configured for high energy absorption. In the event of a frontal collision, the body structure with its front-mounted polygonal main frame is designed to prevent structural penetration while distributing forces evenly through multiple major load bearing pathways - and away from the passenger compartment. For comparison, a conventional body structure generally concentrates the loads from a collision through two pathways running longitudinally through the lower portion of the frame. In the ACE body structure for example, frontal impact force can be distributed from the front of the vehicle through the side sill, floor frame and A-pillar in order to reduce the cabin deformation.

The bottom line is that the ACE body structure enhances energy distribution during a collision because impact forces can be distributed through more vehicle mass and away from the passenger compartment.

For side impacts, all models now incorporate high-grade, high-strength steel body side frame structure. Additionally, coupe models apply special gussets used to further help direct forces throughout the frame for side impacts.

Door Construction

For safety, all Civic doors feature side impact protection beams. For quality, the doors are built on a robust structure that provides a solid feel and sound when closing. The door latches themselves are carefully engineered to latch securely with a light closing pressure, and to emit a quality sound. Honda engineers also designed a special "bumping door seal" that purposefully transmits a certain low-frequency vibration to the door itself. This desirable vibration is heard as a substantial sound as the door closes that confirms the impression of substance and quality. Additionally, the Civic's front doors use triple-stage stopper construction for ease of ingress/egress in tight parking situations.

Pedestrian Safety

Honda's commitment to safety extends to pedestrians as well as vehicle occupants. To help reduce pedestrian injuries in the event of a collision, the Civic's hood and fender areas are designed to deform if contacted by an adult or child pedestrian. Energy-absorbing collapsible hood supports, wiper arm pivots and fender mounts are designed to allow substantial deformation in an impact.

Front Subframe

To maximize gains derived from its stronger body, the front subframe of the new Civic has structural enhancements that improve ride and handling characteristics, while reducing noise and vibration. The front subframe is a completely new design with hydro-formed elements that substantially increase both strength and rigidity. Hydro-forming is the state-of-the-art method of creating complex shapes from steel. To make Civic's major subframe components, hydraulic water pressure forces the steel tube into rigid dies (molds) under tremendous pressure. The result is a precisely made part that is stronger where necessary and precisely the right size and shape. The subframe is attached to the Civic's body using special rubber floating mounts that minimize the level of road and engine noise and vibration transferred to the passenger compartment. However, the Civic Si utilizes stamped and welded components for the subframe due to its unique engine and transmission.

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