| 2006 Honda Civic Coupe and Civic Si Specifications | ||||
| ENGINEERING | DX | LX | EX | Si |
| Engine Type | In-Line 4-Cylinder | In-Line 4-Cylinder | In-Line 4-Cylinder | In-Line 4-Cylinder |
| Engine Block/Cylinder Head | Aluminum-Alloy | Aluminum-Alloy | Aluminum-Alloy | Aluminum-Alloy |
| Displacement (cc) | 1799 | 1799 | 1799 | 1998 |
| Horsepower* @ rpm (SAE net) | 140 @ 6300 | 140 @ 6300 | 140 @ 6300 | 197 @ 7800 |
| Torque* (lb.-ft. @ rpm) | 128 @ 4300 | 128 @ 4300 | 128 @ 4300 | 139 @ 6200 |
| Redline (rpm) | 6800 | 6800 | 6800 | 8000 |
| Bore and Stroke (mm) | 81 x 87.3 | 81 x 87.3 | 81 x 87.3 | 86 x 86 |
| Compression Ratio | 10.5:1 | 10.5:1 | 10.5:1 | 11.0:1 |
| Valvetrain | 16-Valve SOHC i-VTEC® | 16-Valve SOHC i-VTEC® | 16-Valve SOHC i-VTEC® | 16-Valve DOHC i-VTEC® |
| Valvetrain Drive Type | Chain | Chain | Chain | Chain |
| Stainless Steel Exhaust Manifold | . | . | . | X |
| Multi-Point Fuel Injection | X | X | X | X |
| Drive-by-Wire Throttle System™ | X | X | X | X |
| Front-Wheel Drive | X | X | X | X |
| CARB Emissions Rating | ULEV-2 | ULEV-2 | ULEV-2 | LEV-2 |
| Federal Emissions Rating | Tier 2 / Bin 5 | Tier 2 / Bin 5 | Tier 2 / Bin 5 | Tier 2 / Bin 5 |
| Direct Ignition System with Immobilizer | X | X | X | X |
| 100,000-Mile or More Tune-Up Interval | X | X | X | X |
| *Horsepower and torque calculations reflect new SAE J1349 procedures revised August, 2004. | ||||
| TRANSMISSIONS | DX | LX | EX | Si |
| 5-Speed Manual Transmission Gear Ratios: 1st: 3.143, 2nd: 1.870, 3rd: 1.235, 4th: 0.949, 5th: 0.727, Reverse: 3.308, Final Drive: 4.294 | X | X | X | . |
| Compact 5-Speed Automatic Transmission Gear Ratios: 1st: 2.666, 2nd: 1.534, 3rd: 1.022, 4th: 0.721, 5th: 0.525, Reverse: 1.956, Final Drive: 4.437 | Available | Available | Available | . |
| Close-Ratio 6-Speed Manual Transmission Gear Ratios: 1st: 3.267, 2nd: 2.130, 3rd: 1.517, 4th: 1.147, 5th: 0.921, 6th: 0.659, Reverse: 3.583, Final Drive: 4.765 |
. | . | . | X |
| Helical Limited-Slip Differential | . | . | . | X |
| BODY/SUSPENSION/CHASSIS | DX | LX | EX | Si |
| Unit-Body Construction | X | X | X | X |
| Control-Link MacPherson Strut Front Suspension | X | X | X | X |
| Reactive-Link Double Wishbone Rear Suspension | X | X | X | X |
| Stabilizer Bar (mm., front/rear) | 25.4x3.5/ -- | 25.4x3.5 / 11.0 | 25.4x3.5 / 11.0 | 28.0 / 17.0 |
| Power-Assisted Rack-and-Pinion Steering | X | X | X | Electric |
| Steering Wheel Turns, Lock-to-Lock | 2.73 | 2.67 | 2.67 | 2.65 |
| Steering Ratio | 13.73:1 | 13.73:1 | 13.73:1 | 13.62:1 |
| Turning Diameter, Curb-to-Curb (ft.) | 35.4 | 35.4 | 35.4 | 35.6 |
| Power-Assisted Ventilated Front Disc/Rear Drum Brakes (in., front/rear) | 10.3 / 7.9 | 10.3 / 7.9 | . | . |
| Power-Assisted Ventilated Front Disc/Solid Rear Disc Brakes | . | . | 10.3 / 10.2 | 11.8 / |
| Wheels | 15x6J with Full Covers | 16x6.5J with Full Covers | 16x6.5J Alloy | 17x7J Alloy |
| All-Season Tires | P195 / 65 R15 89H | P205 / 55 R16 89H | P205 / 55 R16 89H | P215 / 45 R17 87V |
| Michelin® Pilot Exalto® PE2 Summer Tires | . | . | . | 215 / 45 R17 91W (available) |
| Compact Spare Tire | X | X | X | X |
| INTERIOR MEASUREMENTS | DX | LX | EX | Si |
| Headroom (in., front/rear) | 38.0 / 35.1 | 38.0 / 35.1 | 37.8 / 34.7 | 37.8 / 34.7 |
| Legroom (in., front/rear) | 42.6 / 30.3 | 42.6 / 30.3 | 42.6 / 30.3 | 42.6 / 30.3 |
| Shoulder Room (in., front/rear) | 53.9 / 52.1 | 53.9 / 52.1 | 53.9 / 52.1 | 53.9 / 52.1 |
| Hiproom (in., front/rear) | 53.0 / 49.2 | 53.0 / 49.2 | 53.0 / 49.2 | 53.0 / 49.2 |
| Cargo Volume (cu. ft.) | 11.5 | 11.5 | 11.5 | 11.5 |
| Passenger Volume (cu. ft.) | 83.7 | 83.7 | 83.0 | 83.0 |
| Seating Capacity | 5 | 5 | 5 | 5 |
| EXTERIOR MEASUREMENTS | DX | LX | EX | Si |
| Wheelbase (in.) | 104.3 | 104.3 | 104.3 | 104.3 |
| Length (in.) | 174.8 | 174.8 | 174.8 | 174.8 |
| Height (in.) | 53.5 | 53.5 | 53.5 | 53.5 |
| Width (in.) | 68.9 | 68.9 | 68.9 | 68.9 |
| Track (in., front/rear) | 59.0 / 60.1 | 59.0 / 60.1 | 59.0 / 60.1 | 59.0 / 60.1 |
| Curb Weight (lbs., MT/AT) | 2593 / 2655 | 2654/2716 | 2701/ 2767 | 2877 / -- |
| Weight Distribution (%, front/rear, MT) | 60/40 | 60/40 | 60/40 | 61/39 |
| Weight Distribution (%, front/rear, AT) | 60/40 | 60/40 | 60/40 | -- |
| MILEAGE ESTIMATES*/CAPACITIES | DX | LX | EX | Si |
| 5-Speed Manual (City/Highway) | 30/39 | 30/39 | 30/39 | . |
| 6-Speed Manual (City/Highway) | . | . | . | 22/31 |
| 5-Speed Automatic (City/Highway) | 30/40 | 30/40 | 30/40 | . |
| Crankcase (qt.) | 4.7 | 4.7 | 4.7 | 5.8 |
| Coolant System (qt.) | 6.3 | 6.3 | 6.3 | 6.7 |
| Fuel (gal.) | 13.2 | 13.2 | 13.2 | 13.2 |
| Required Fuel | Regular Unleaded | Regular Unleaded | Regular Unleaded | Premium Unleaded |
| *Fuel economy values determined from manufacturer test results. Official 2006 EPA mileage estimates not available at time of printing. Use for comparison purposes only. Actual mileage may vary. | ||||
| All values are subject to change without notice. | ||||