The Honda Civic IX Coupe Si 2.4 i-VTEC, produced from April 2011 to February 2014, represented a performance-oriented variant within the ninth-generation Civic Coupe lineup (2012-2015). Positioned as the top-tier trim level for the coupe body style, the Si model aimed to deliver a more engaging driving experience than the standard Civic trims. It was a key offering for Honda in the North American market, catering to enthusiasts seeking a sporty and reliable compact car. The “Si” designation, historically signifying “Sport Injected,” continued to represent Honda’s commitment to performance enhancements. This generation of Civic Si moved away from the high-revving K20 engine of previous generations, adopting a larger displacement 2.4-liter engine for increased torque and broader power delivery.
Technical Specifications
| Brand | Honda |
| Model | Civic |
| Generation | Civic IX Coupe |
| Type (Engine) | Si 2.4 i-VTEC (201 Hp) |
| Start of production | April, 2011 |
| End of production | February, 2014 |
| Powertrain Architecture | Internal Combustion engine |
| Body type | Coupe |
| Seats | 5 |
| Doors | 2 |
| Fuel consumption (economy) – urban (EPA) | 10.7 l/100 km (22 US mpg, 26.4 UK mpg, 9.3 km/l) |
| Fuel consumption (economy) – extra urban (EPA) | 7.6 l/100 km (30.9 US mpg, 37.2 UK mpg, 13.2 km/l) |
| Fuel consumption (economy) – combined (EPA) | 9.4 l/100 km (25 US mpg, 30.1 UK mpg, 10.6 km/l) |
| Fuel Type | Petrol (Gasoline) |
| Emission standard | ULEV-2 |
| Weight-to-power ratio | 6.5 kg/Hp, 154 Hp/tonne |
| Weight-to-torque ratio | 5.7 kg/Nm, 176.2 Nm/tonne |
| Power | 201 Hp @ 7000 rpm |
| Power per litre | 85.4 Hp/l |
| Torque | 230 Nm @ 4400 rpm (169.64 lb.-ft. @ 4400 rpm) |
| Maximum engine speed | 7000 rpm |
| Engine layout | Front, Transverse |
| Engine Model/Code | K24Z7 |
| Engine displacement | 2354 cm3 (143.65 cu. in.) |
| Number of cylinders | 4 |
| Engine configuration | Inline |
| Cylinder Bore | 87 mm (3.43 in.) |
| Piston Stroke | 99 mm (3.9 in.) |
| Compression ratio | 11:1 |
| Number of valves per cylinder | 4 |
| Fuel injection system | Multi-port manifold injection |
| Engine aspiration | Naturally aspirated engine |
| Valvetrain | DOHC, i-VTEC |
| Engine oil capacity | 4.2 l (4.44 US qt | 3.7 UK qt) |
| Coolant | 5.5 l (5.81 US qt | 4.84 UK qt) |
| Kerb Weight | 1305-1357 kg (2877.03 – 2991.67 lbs.) |
| Max. weight | 1780 kg (3924.23 lbs.) |
| Max load | 423-475 kg (932.56 – 1047.2 lbs.) |
| Trunk (boot) space – minimum | 331 l (11.69 cu. ft.) |
| Fuel tank capacity | 50 l (13.21 US gal | 11 UK gal) |
| Length | 4458 mm (175.51 in.) |
| Width | 1752 mm (68.98 in.) |
| Height | 1397 mm (55 in.) |
| Wheelbase | 2620 mm (103.15 in.) |
| Front track | 1499 mm (59.02 in.) |
| Rear (Back) track | 1522 mm (59.92 in.) |
| Minimum turning circle (turning diameter) | 10.8 m (35.43 ft.) |
| Drivetrain Architecture | The Internal combustion engine (ICE) drives the front wheels of the vehicle. |
| Drive wheel | Front wheel drive |
| Number of gears and type of gearbox | 6 gears, manual transmission |
| Front suspension | Independent, type McPherson with coil spring and anti-roll bar |
| Rear suspension | Independent multi-link spring suspension with stabilizer |
| Front brakes | Ventilated discs, 300 mm |
| Rear brakes | Disc, 259 mm |
| Assisting systems | ABS (Anti-lock braking system) |
| Steering type | Steering rack and pinion |
| Power steering | Electric Steering |
| Tires size | 215/45 R17 |
| Wheel rims size | 7J x 17 |
Powertrain & Engine Architecture
The heart of the Civic Si Coupe was the K24Z7 2.4-liter inline-four cylinder engine. This engine represented a departure from the higher-revving K20 engines found in previous Si models. The K24Z7 utilized a single-overhead camshaft (SOHC) cylinder head, a slightly lower compression ratio (11:1), and a revised intake manifold compared to the standard 2.4-liter engine found in other Civic trims. The engine featured Honda’s i-VTEC (Intelligent Variable Timing and Lift Electronic Control) system, which adjusted both valve timing and lift to optimize performance and fuel efficiency across the engine’s operating range. Fuel delivery was handled by a multi-point fuel injection system. The sole transmission option was a close-ratio 6-speed manual transmission, designed to maximize the engine’s power output and provide a more engaging driving experience. The transmission featured a shorter final drive ratio compared to other Civic models, further enhancing acceleration.
Driving Characteristics
The 201 horsepower and 169 lb-ft of torque produced by the K24Z7 engine provided a noticeable step up in performance compared to the standard Civic Coupe. While not as peaky as the K20 engine, the K24Z7 offered a broader, more usable powerband, making it easier to drive in everyday situations. The 6-speed manual transmission was well-matched to the engine, offering precise shifts and a satisfying mechanical feel. The shorter gear ratios contributed to brisk acceleration, particularly in the lower gears. Compared to the standard automatic Civic Coupes, the Si model offered significantly improved responsiveness and driver involvement. While the Si wasn’t a track-focused sports car, it provided a fun and engaging driving experience for enthusiasts.
Equipment & Trim Levels
The Civic Si Coupe came standard with a number of features designed to enhance both performance and comfort. These included sport seats with aggressive bolstering, a leather-wrapped steering wheel and shift knob, and a unique instrument cluster with Si-specific graphics. Standard exterior features included a rear spoiler, 17-inch alloy wheels, and a sport-tuned suspension. Optional extras included a premium audio system, navigation system, and sunroof. The interior trim was generally more upscale than the base Civic models, with a focus on sporty aesthetics.
Chassis & Braking
The Civic Si Coupe featured a sport-tuned suspension with stiffer springs and dampers compared to the standard Civic Coupe. A thicker front stabilizer bar further reduced body roll during cornering. The front suspension utilized McPherson struts, while the rear suspension employed a multi-link design. Braking duties were handled by ventilated front discs and solid rear discs. The Si also included standard ABS (Anti-lock Braking System) for enhanced safety. The suspension tuning aimed to provide a balance between sporty handling and acceptable ride comfort.
Market Reception & Comparison
The Civic Si Coupe was generally well-received by automotive critics, who praised its engaging driving dynamics, responsive engine, and well-equipped interior. It was often compared to other sporty compact cars, such as the Volkswagen GTI and Mazda MX-5 Miata. While the GTI offered more overall refinement and practicality, the Civic Si provided a more affordable and accessible entry point into the performance compact segment. Fuel economy was respectable for a performance-oriented vehicle, averaging around 25 mpg in combined driving. Reliability was generally good, consistent with Honda’s reputation for building durable and dependable vehicles.
Legacy
The K24Z7 engine and 6-speed manual transmission combination proved to be a reliable and durable powertrain. Civic Si Coupes from this generation have maintained a relatively strong following in the used car market, particularly among enthusiasts seeking a fun-to-drive and affordable compact car. The K24Z7 engine is known for its ability to handle modifications, making it a popular choice for those looking to increase power output. While not as iconic as the K20-powered Si models, the ninth-generation Civic Si Coupe remains a respected and capable performance car.
