07 Honda Civic Si Specs – Your Ultimate Guide To Power, Performance

Ah, the 8th generation Honda Civic Si. For many of us, it’s not just a car; it’s a legend. Known for its screaming VTEC engine, precise 6-speed manual transmission, and nimble handling, the ’07 Civic Si captured the hearts of enthusiasts worldwide. If you own one, are thinking about buying one, or just appreciate a truly engaging driving machine, understanding its core strengths and quirks is key.

At FatBoysOffroad, we know that whether you’re tackling trails or carving canyons, knowledge is power. That’s why we’re diving deep into the 07 Honda Civic Si specs. This comprehensive guide will equip you with all the essential information, from the engine’s internals to common maintenance pitfalls and smart upgrade paths. Get ready to unlock the full potential and ensure the longevity of your beloved Si.

Unpacking the Heart: 07 Honda Civic Si Specs for Engine & Drivetrain

The soul of the 2007 Civic Si is undoubtedly its engine, a masterpiece of Honda engineering. Understanding these crucial 07 Honda Civic Si specs tips is the first step to truly appreciating your ride.

The K20Z3 Engine: A VTEC Masterpiece

The 07 Civic Si is powered by the naturally aspirated 2.0-liter K20Z3 inline-four engine. This high-revving gem is a testament to Honda’s commitment to performance without forced induction.

Displacement: 1998 cc (2.0 L)
Horsepower: 197 hp (147 kW) at 7800 rpm
Torque: 139 lb-ft (188 Nm) at 6100 rpm
Redline: 8000 rpm
Fuel Type: Premium unleaded (91+ octane recommended)

The K20Z3 features Honda’s i-VTEC system, which optimizes valve timing and lift for both power and efficiency. The famed VTEC “kick” occurs around 5800 rpm, transforming the engine’s character from docile to aggressive. Keeping up with regular oil changes using the correct synthetic oil is paramount for this engine’s health, especially with its high-revving nature.

The Drivetrain: Precision and Control

Matching the potent K20Z3 is a robust and engaging drivetrain designed for driver involvement.

Transmission: 6-speed manual transmission
Clutch: Single-plate dry clutch
Differential: Helical limited-slip differential (LSD)

The 6-speed manual is renowned for its short throws and precise engagement. The factory-equipped helical LSD is a game-changer, significantly improving traction and handling, especially when accelerating out of corners. This is one of the key benefits of 07 Honda Civic Si specs that sets it apart from standard Civics.

To ensure smooth shifts and protect your transmission, always use the recommended Honda MTF (Manual Transmission Fluid). If you notice grinding, especially in third gear, it might be a common issue that often points to worn synchronizers. Consult a trusted mechanic for diagnosis if this occurs.

Suspension, Brakes, and Handling: Performance 07 Honda Civic Si Specs

Beyond the engine, the 07 Civic Si boasts a chassis tuned for spirited driving. Understanding these performance-oriented 07 Honda Civic Si specs is crucial for anyone looking to push their Si to its limits, safely.

Suspension System: Agile and Responsive

The 8th gen Civic Si uses a well-engineered suspension setup that balances daily comfort with enthusiastic handling.

Front Suspension: MacPherson strut with coil springs and stabilizer bar
Rear Suspension: Multi-link with coil springs and stabilizer bar
Shock Absorbers: Gas-pressurized, twin-tube

The Si models typically came with stiffer springs and dampers compared to regular Civics, contributing to reduced body roll and improved cornering stability. Regular inspection of your suspension components—shocks, struts, bushings, and sway bar end links—is part of any good 07 Honda Civic Si specs care guide. Worn components can severely degrade handling and ride quality.

Braking System: Confident Stopping Power

Stopping power is just as important as going power, and the 07 Si doesn’t disappoint.

Front Brakes: 11.8-inch (300 mm) ventilated disc brakes
Rear Brakes: 10.2-inch (260 mm) solid disc brakes
ABS: 4-channel Anti-lock Braking System (ABS)
EBD: Electronic Brake Distribution (EBD)

These larger-than-standard brakes provide strong, consistent stopping performance. When it’s time for replacement, opt for quality pads and rotors. For DIYers, bleeding the brakes every few years with fresh DOT 3 or DOT 4 fluid is a great way to maintain peak performance and is a smart 07 Honda Civic Si specs best practice.

Steering System: Direct and Communicative

The Si features an electric power steering (EPS) system that provides good feedback and responsiveness.

Steering Type: Rack-and-pinion, electric power-assisted
Turns Lock-to-Lock: Approximately 2.5 turns

This direct steering feel is part of what makes the Si so engaging to drive. If you feel any looseness or excessive play, check your tie rod ends and steering rack bushings. A proper wheel alignment is also critical after any suspension work to maintain optimal handling.

Interior & Exterior: Comfort, Style, and Practicality in the 2007 Si

While performance is paramount, the 07 Civic Si also offers a comfortable and practical environment, wrapped in a distinctive package. These practical 07 Honda Civic Si specs contribute to its appeal as a daily driver and weekend warrior.

Interior Features: Driver-Focused Cockpit

The Si’s interior is designed with the driver in mind, offering supportive seating and intuitive controls.

Seating: Sport bucket seats with Si embroidery and red stitching
Gauges: Digital speedometer, analog tachometer
Steering Wheel: Leather-wrapped with audio controls
Shifter: Aluminum shift knob with red stitching on the boot
Standard Features: Power windows, power locks, cruise control, 350-watt premium audio system with 7 speakers and subwoofer

The seats provide excellent bolstering for spirited driving without being overly aggressive for daily commutes. Keep an eye on wear and tear on the driver’s bolster, a common spot for aging Si interiors. Regular cleaning and conditioning of leather or fabric can extend their life, which is a simple yet effective 07 Honda Civic Si specs care guide tip.

Exterior Design: Sporty and Aerodynamic

The 07 Civic Si stands out from its regular Civic siblings with several sporty exterior enhancements.

Wheels: 17-inch alloy wheels (typically 17×7.0J)
Tires: 215/45R17 performance tires
Aerodynamics: Rear wing spoiler, unique front and rear fascias
Lighting: Fog lights (standard on Si)

The Si’s aggressive stance and aerodynamic elements aren’t just for show; they contribute to its high-speed stability. A common issue with older 8th gen Civics, including the Si, is clear coat failure, especially on horizontal surfaces like the roof and trunk. Regular washing, waxing, and ceramic coating can help protect your paint and maintain its value.

Common Problems with 07 Honda Civic Si Specs and How to Address Them

Even a legend like the 07 Civic Si has its quirks. Being aware of these common problems with 07 Honda Civic Si specs allows you to perform preventative maintenance or address issues promptly, saving you headaches and money.

Third Gear Grind: This is perhaps the most infamous issue. Owners often experience difficulty shifting into third gear, accompanied by a grind.
- Cause: Worn third gear synchronizer.
- Solution: A transmission fluid change with Honda MTF can sometimes alleviate minor symptoms. For severe grinding, a transmission rebuild or replacement of the synchronizer is often necessary. This is definitely a job for a professional mechanic.
Clear Coat Failure: As mentioned, the paint’s clear coat can degrade, leading to peeling and dullness.
- Cause: UV exposure, environmental factors, factory paint quality.
- Solution: Prevention through regular washing, waxing, and garaging is best. Once it starts, repainting the affected panels is the only permanent fix.
Engine Mount Wear: Particularly the passenger-side engine mount, can wear out prematurely.
- Cause: Engine vibrations and age.
- Symptoms: Excessive engine movement, vibrations felt in the cabin, clunking noises during acceleration or shifting.
- Solution: Replace with a new OEM mount or an aftermarket performance mount for added durability, which can be a good 07 Honda Civic Si specs best practice if you plan on modifying the car.
Clutch Master Cylinder (CMC) Issues: Some owners report a soft or inconsistent clutch pedal feel.
- Cause: OEM CMC design can be a weak point under heavy use.
- Solution: Upgrading to an aftermarket CMC (e.g., from an Acura RSX-S or a dedicated performance unit) can improve pedal feel and reliability, especially for modified cars.
AC Compressor Failure: A common complaint across many Honda models of this era.
- Cause: Design flaw or general wear and tear.
- Symptoms: AC blowing warm air, loud noises from the engine bay when AC is on.
- Solution: Replacement of the AC compressor. This is a job for a professional due to refrigerant handling.

Being proactive with these issues can save you from bigger repair bills down the road. Regular inspections during your oil changes are a great way to spot potential problems early.

Maximizing Your Si: Performance Mods & 07 Honda Civic Si Specs Best Practices

The 07 Civic Si is a fantastic platform for modifications. Whether you’re aiming for more power, better handling, or just a more aggressive look, knowing how to 07 Honda Civic Si specs can be enhanced is key.

Engine Performance Upgrades

While the K20Z3 is great from the factory, there’s always room for improvement.

Intake: A cold air intake (CAI) or short ram intake can improve throttle response and add a few horsepower.
- Tip: Choose a quality brand like Injen, K&N, or Skunk2. Ensure proper fitment to avoid hydrolock with CAIs.
Exhaust: A cat-back exhaust system can free up some power and give your Si a more aggressive sound.
- Tip: Research sound clips before buying to find a tone you like. Brands like Skunk2, MagnaFlow, and Borla are popular.
Header/Downpipe: Upgrading the exhaust header (which includes the catalytic converter on the Si) can yield significant gains but may require a tune and can affect emissions compliance.
- Warning: Always check local laws regarding catalytic converter removal or modification.
Engine Tuning (FlashPro): This is arguably the single most important modification for any Si. A Hondata FlashPro allows you to tune your ECU, optimizing air/fuel ratios, ignition timing, and VTEC engagement points for your specific modifications.
- Pro Tip: Always get a custom tune from a reputable tuner after installing performance parts. This ensures maximum power and engine safety.

Suspension and Handling Enhancements

To truly exploit the Si’s handling capabilities, consider these upgrades.

Coilovers or Lowering Springs: These can reduce body roll and lower the car’s center of gravity for improved cornering.
- Tip: Coilovers offer adjustable ride height and damping, providing more control. Brands like Tein, BC Racing, and Fortune Auto are popular.
Sway Bars: Upgrading front and/or rear sway bars can further reduce body roll.
- Recommendation: A stiffer rear sway bar is a popular choice for improving turn-in response.
Bushings: Replacing worn rubber bushings with stiffer polyurethane alternatives can sharpen handling response.
- Note: Stiffer bushings can increase NVH (Noise, Vibration, Harshness).
Brake Upgrades: For track use or aggressive driving, consider upgraded brake pads, stainless steel brake lines, and high-temperature brake fluid.
- Safety First: Never skimp on brake components. If you’re unsure, have a professional install them.

Remember, any modification should be considered carefully, installed correctly, and ideally, followed by a professional alignment and tune. These are crucial 07 Honda Civic Si specs best practices for both performance and reliability.

Sustainable Ownership: Eco-Friendly 07 Honda Civic Si Specs & Care

Even with a performance-oriented car like the Si, sustainable and eco-friendly practices are important. Being mindful of your impact and extending your vehicle’s life through proper care is part of responsible ownership.

Fuel Efficiency and Driving Habits

While the Si loves to rev, smart driving can improve its fuel economy.

Smooth Acceleration: Avoid sudden, aggressive acceleration. Gradual throttle input saves fuel.
Anticipate Traffic: Look ahead to avoid unnecessary braking and acceleration.
Maintain Speed: Use cruise control on highways to maintain a consistent speed.
Tire Pressure: Keep tires properly inflated to the manufacturer’s recommended pressure. Under-inflated tires increase rolling resistance and reduce fuel economy.
Avoid Excessive Idling: If you’re going to be stopped for more than a minute, turn off the engine.

These simple habits contribute to more sustainable 07 Honda Civic Si specs operation, reducing your carbon footprint and saving money at the pump.

Eco-Friendly Maintenance and Disposal

Your maintenance choices also play a role in environmental responsibility.

Proper Fluid Disposal: Never dump used oil, coolant, or other automotive fluids down the drain. Take them to certified recycling centers or auto parts stores that offer recycling programs.
Recycle Parts: Old tires, batteries, and metal parts can almost always be recycled. Check with your local waste management or auto shops.
Eco-Friendly Products: Use biodegradable cleaning products for washing your car.
Long-Lasting Parts: Investing in higher-quality, longer-lasting parts reduces the frequency of replacements and waste. This is an often-overlooked aspect of eco-friendly 07 Honda Civic Si specs management.

By integrating these practices, you can enjoy your Si’s performance while being a responsible car owner.

Your Comprehensive 07 Honda Civic Si Specs Guide: Maintenance & Longevity

To keep your 07 Civic Si running strong for years to come, a consistent and thorough maintenance regimen is essential. This 07 Honda Civic Si specs guide focuses on routine care that every owner should follow.

Essential Fluid Checks and Changes

Fluids are the lifeblood of your vehicle. Don’t neglect them!

Engine Oil: Change every 5,000-7,500 miles or every 6 months, using full synthetic 5W-30 oil. Always check your owner’s manual for exact specifications and intervals.
- DIY Tip: A good quality oil filter (OEM Honda or reputable aftermarket) is just as important as the oil itself.
Transmission Fluid: Replace every 30,000-60,000 miles with genuine Honda MTF. This is crucial for preventing the infamous third gear grind.
- Pro Tip: Many DIYers find a fluid change every 15,000-20,000 miles beneficial for preventing synchro wear.
Coolant: Flush and replace every 5 years or 60,000 miles with Honda Type 2 coolant.
- Safety Note: Always allow the engine to cool completely before opening the radiator cap.
Brake Fluid: Flush and replace every 2-3 years. Brake fluid is hygroscopic (absorbs moisture), which can lead to a spongy pedal and reduced braking performance.
- DIY Tip: A simple one-person brake bleeding kit can make this job easier.
Power Steering Fluid: The Si uses electric power steering, so no traditional hydraulic fluid to worry about!

Regular Inspections and Replacements

Beyond fluids, many components require periodic checks.

Tires: Check pressure weekly. Rotate tires every 5,000-7,500 miles. Replace when tread depth is low (typically around 2/32 inch).
- Importance: Proper tire care is vital for safety, handling, and fuel economy.
Spark Plugs: Replace iridium spark plugs every 100,000 miles.
- Recommendation: Use OEM or equivalent iridium plugs for optimal performance.
Air Filters: Check engine air filter every 15,000 miles, replace as needed. Cabin air filter every 12,000-15,000 miles.
- Benefits: Clean filters improve engine efficiency and cabin air quality.
Belts and Hoses: Inspect drive belt and coolant hoses for cracks, fraying, or bulging every oil change. Replace as needed, typically every 60,000-90,000 miles for belts.
- Warning: A snapped drive belt can leave you stranded.
Brakes: Inspect brake pads, rotors, and calipers every time you rotate your tires. Look for uneven wear, cracks, or deep grooves.
- Action: Replace pads when they reach 3mm or less. Replace rotors if warped or excessively worn.

Adhering to this detailed 07 Honda Civic Si specs care guide will ensure your Si remains a reliable and thrilling machine for years to come. When in doubt, always refer to your owner’s manual or consult a trusted Honda specialist.

Frequently Asked Questions About 07 Honda Civic Si Specs

What is the horsepower of the 07 Honda Civic Si?

The 2007 Honda Civic Si is equipped with the K20Z3 2.0-liter i-VTEC engine, producing 197 horsepower at 7800 rpm.

Does the 07 Civic Si come with a limited-slip differential?

Yes, all 2007 Honda Civic Si models come standard with a helical limited-slip differential (LSD), which significantly improves traction and handling during spirited driving.

What are common issues to look for when buying a used 07 Civic Si?

When buying a used 07 Civic Si, inspect for “third gear grind” in the transmission, clear coat failure on the paint, worn engine mounts (especially the passenger side), and check the clutch pedal feel for any signs of Clutch Master Cylinder (CMC) issues. Always get a pre-purchase inspection from a trusted mechanic.

How can I improve the fuel economy of my 07 Civic Si?

To improve fuel economy, practice smooth acceleration and braking, maintain consistent speeds (use cruise control on highways), keep your tires properly inflated, and perform regular maintenance such as oil changes and air filter replacements. Avoiding aggressive driving and excessive idling also helps.

Is the 07 Honda Civic Si a good daily driver?

Yes, the 07 Honda Civic Si is widely considered an excellent daily driver. It offers a balance of engaging performance, good fuel economy for its class, Honda’s legendary reliability, and a practical interior with comfortable seating. Its sporty nature doesn’t compromise its usability for everyday commutes.

There you have it – a deep dive into the 07 Honda Civic Si specs that make this car a true enthusiast’s choice. From its high-revving K20Z3 engine and precise 6-speed manual with LSD, to its performance-tuned chassis and driver-focused interior, the 8th gen Si offers an unparalleled driving experience for its class.

Whether you’re a seasoned owner, a new enthusiast, or considering one for your garage, understanding these specifications and following our maintenance and care guidelines will help you get the most out of your Si. Remember, knowledge is power, and proper care ensures your ride stays on the road, thrilling you for years to come. So, get out there, enjoy the VTEC, and keep those wheels turning!

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Thomas Corle

Founder & Automobile expert at FatBoysOffroad

Automobile expert and off-road enthusiast, sharing in-depth knowledge of vehicles, gear, and adventures. Helping readers make smart decisions and enjoy the thrill of off-roading safely and confidently.