The Honda Civic IX Coupe Si 2.4 i-VTEC, produced from March 2014 to September 2015, represented a performance-oriented variant within the ninth generation (2012-2015) Civic Coupe lineup. 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. This facelifted version, introduced in 2013, brought styling updates and refinements to the existing ninth-generation platform (1HX0/FG).
Technical Specifications
| Brand | Honda |
| Model | Civic |
| Generation | Civic IX Coupe (facelift 2013) |
| Type (Engine) | Si 2.4 i-VTEC (205 Hp) |
| Start of production | March, 2014 |
| End of production | September, 2015 |
| 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) | 6.7 l/100 km (35.1 US mpg, 42.2 UK mpg, 14.9 km/l) |
| Fuel Type | Petrol (Gasoline) |
| Emission standard | ULEV-2 |
| Weight-to-power ratio | 6.6 kg/Hp, 150.5 Hp/tonne |
| Weight-to-torque ratio | 5.8 kg/Nm, 173.3 Nm/tonne |
| Power | 205 Hp @ 7000 rpm |
| Power per litre | 87.1 Hp/l |
| Torque | 236 Nm @ 4400 rpm (174.06 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 | 1362 kg (3002.7 lbs.) |
| Max. weight | 1780 kg (3924.23 lbs.) |
| Max load | 418 kg (921.53 lbs.) |
| Trunk (boot) space – minimum | 331 l (11.69 cu. ft.) |
| Fuel tank capacity | 50 l (13.21 US gal | 11 UK gal) |
| Length | 4542 mm (178.82 in.) |
| Width | 1752 mm (68.98 in.) |
| Height | 1397 mm (55 in.) |
| Wheelbase | 2621 mm (103.19 in.) |
| Front track | 1503 mm (59.17 in.) |
| Rear (Back) track | 1522 mm (59.92 in.) |
| Ride height (ground clearance) | 147 mm (5.79 in.) |
| Minimum turning circle (turning diameter) | 11 m (36.09 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 | 225/40 R18 |
| Wheel rims size | 7.5J x 18 |
Powertrain & Engine Architecture
The heart of the Civic Si was the 2.4-liter K24Z7 inline-four cylinder engine. This engine was a naturally aspirated powerplant, meaning it did not utilize forced induction like a turbocharger or supercharger. It featured Honda’s intelligent Variable Valve Timing and Lift Electronic Control (i-VTEC) system, which allowed for optimized valve timing and lift for both low-end torque and high-RPM horsepower. The K24Z7 utilized multi-point fuel injection and a compression ratio of 11:1. The engine produced 205 horsepower at 7000 rpm and 174 lb-ft of torque at 4400 rpm. The sole transmission option for the 2014-2015 Civic Si Coupe was a close-ratio six-speed manual transmission, emphasizing the sporty nature of the vehicle. This transmission was designed to maximize the engine’s powerband and provide precise gear changes.
Driving Characteristics
The Civic Si Coupe, with its 2.4-liter engine and six-speed manual, offered a noticeably more spirited driving experience compared to the base Civic Coupe models. The close-ratio gearbox kept the engine within its optimal power range, providing quick acceleration and responsive performance. While not a track-focused machine, the Si offered a good balance of everyday usability and engaging driving dynamics. The steering was precise, and the suspension, while firm enough to minimize body roll, remained comfortable enough for daily commuting. Compared to the automatic-equipped standard Civic Coupes, the Si provided a much more connected and involving driving experience. The manual transmission demanded more driver involvement, but rewarded it with greater control and enjoyment.
Equipment & Trim Levels
The Civic Si Coupe came well-equipped as standard. Key features included sport seats with aggressive bolstering, a leather-wrapped steering wheel and shift knob, a premium audio system, and Honda’s Display Audio infotainment system. Exterior styling cues included a unique rear spoiler, 18-inch alloy wheels, and a sport-tuned exhaust system. Optional extras were relatively limited, focusing primarily on accessories like all-weather floor mats and a cargo net. The interior generally featured a black color scheme with red stitching accents, further emphasizing the Si’s sporty character.
Chassis & Braking
The Civic Si Coupe featured a MacPherson strut front suspension and a multi-link rear suspension, both tuned for enhanced handling. Compared to the standard Civic Coupe, the Si benefited from thicker stabilizer bars and stiffer spring rates. Braking duties were handled by ventilated front discs (300mm) and solid rear discs (259mm). Anti-lock brakes (ABS) were standard. The chassis was reinforced in key areas to improve rigidity and handling precision. The Si also featured a slightly lower ride height than the standard Civic Coupe, contributing to a more planted feel.
Market Reception & Comparison
The Civic Si Coupe was generally well-received by automotive critics. It was praised for its engaging driving dynamics, responsive engine, and well-equipped interior. However, some reviewers noted that the interior materials, while functional, weren’t as premium as those found in some competitors. Compared to other sporty compact coupes of the time, such as the Volkswagen GTI or the Ford Focus ST, the Civic Si offered a different character. The GTI prioritized refinement and a more upscale interior, while the Focus ST focused on raw performance. The Civic Si struck a balance between the two, offering a fun-to-drive experience with a focus on reliability and practicality. Fuel economy was respectable, averaging around 35 mpg in combined driving.
Legacy
The K24Z7 engine powering the 2014-2015 Civic Si Coupe has proven to be a durable and reliable powerplant. With proper maintenance, these engines can easily exceed 200,000 miles. The Civic Si Coupe remains a popular choice in the used car market, particularly among enthusiasts seeking an affordable and engaging front-wheel-drive coupe. Its combination of sporty handling, decent fuel economy, and Honda’s reputation for reliability has ensured its continued appeal. Parts availability is good, and the aftermarket support for the K24Z7 engine is extensive, allowing owners to further enhance its performance.
