Compare the2024 Honda Civic SiVS 2022 Acura ILX

Safety
Warranty
Reliability
Engine
Fuel Economy and Range
Environmental Friendliness
Brakes and Stopping
Tires and Wheels
Suspension and Handling
Chassis
Passenger Space
Cargo Capacity
Ergonomics
Recommendations

Safety

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For enhanced safety, the front and rear seat shoulder belts of the Honda Civic Si have pretensioners to tighten the seatbelts and eliminate dangerous slack in the event of a collision and force limiters to limit the pressure the belts will exert on the passengers. The Acura ILX doesn’t offer pretensioners for its rear seat belts.

In the past twenty years hundreds of infants and young children have died after being left in vehicles, usually by accident. When turning the vehicle off, drivers of the Civic Si are reminded to check the back seat if they opened the rear door before starting out. The ILX doesn’t offer a back seat reminder.

The Honda Civic Si has standard driver and front passenger side knee airbags mounted low on the dashboard. These airbags helps prevent the driver and front passenger from sliding under their seatbelts or the main frontal airbags; this keeps them better positioned during a collision for maximum protection. Knee airbags also help keep the legs from striking the dashboard, preventing knee and leg injuries in the case of a serious frontal collision. The ILX doesn’t offer knee airbags.

Using vehicle speed sensors and seat sensors, smart airbags in the Civic Si deploy with different levels of force or don’t deploy at all to help better protect passengers of all sizes in different collisions. The Civic Si’s side airbags will shut off if a child is leaning against the door. The ILX’s side airbags don’t have smart features and will always deploy full force.

To help make backing out of a parking space safer, the Civic Si has standard Cross Traffic Monitor, helping the driver avoid collisions. Acura charges extra for Rear Cross Traffic Monitor on the ILX.

The Civic Si’s driver alert monitor detects an inattentive driver then sounds a warning and suggests a break. According to the NHTSA, drivers who fall asleep cause about 100,000 crashes and 1500 deaths a year. The ILX doesn’t offer a driver alert monitor.

Both the Civic Si and the ILX have standard driver and passenger frontal airbags, front side-impact airbags, side-impact head airbags, front wheel drive, height adjustable front shoulder belts, plastic fuel tanks, four-wheel antilock brakes, traction control, electronic stability systems to prevent skidding, crash mitigating brakes, daytime running lights, lane departure warning systems and rearview cameras.

The National Highway Traffic Safety Administration does 35 MPH front crash tests on new vehicles. In this test, results indicate that the Honda Civic Si is safer than the Acura ILX:

	Civic Si	ILX
	Driver
STARS	5 Stars	5 Stars
Neck Stress	241 lbs.	257 lbs.
Neck Compression	23 lbs.	56 lbs.
	Passenger
STARS	4 Stars	4 Stars
Chest Compression	.4 inches	.5 inches
Neck Injury Risk	25%	40%
Leg Forces (l/r)	275/164 lbs.	768/623 lbs.

New test not comparable to pre-2011 test results. More stars = Better. Lower test results = Better.

The National Highway Traffic Safety Administration does side impact tests on new vehicles. In this test, which crashes the vehicle into a flat barrier at 38.5 MPH and into a post at 20 MPH, results indicate that the Honda Civic Si is safer than the Acura ILX:

	Civic Si	ILX
	Front Seat
STARS	5 Stars	5 Stars
HIC	195	234
Chest Movement	.7 inches	.9 inches
Hip Force	286 lbs.	487 lbs.
	Rear Seat
STARS	5 Stars	5 Stars
HIC	268	324
Hip Force	516 lbs.	699 lbs.
	Into Pole
STARS	5 Stars	5 Stars
Max Damage Depth	12 inches	14 inches
HIC	260	299
Spine Acceleration	51 G’s	56 G’s
Hip Force	805 lbs.	945 lbs.

New test not comparable to pre-2011 test results. More stars = Better. Lower test results = Better.

Instrumented handling tests conducted by the National Highway Traffic Safety Administration and analysis of its dimensions indicate that the Civic Si, with its five-star roll-over rating, is 1.2% less likely to roll over than the ILX, which received a four-star rating.

For its performance in IIHS driver-side and passenger-side small overlap frontal, moderate overlap frontal, updated side impact, headlight, and daytime pedestrian crash prevention testing, the Insurance Institute for Highway Safety grants the Civic Si the rating of “Top Safety Pick” for 2023, a rating granted to only 54 vehicles tested by the IIHS. The ILX last would have qualified as a “Top Safety Pick” in 2017.

Warranty

Honda pays for scheduled maintenance on the Civic Si for 2 years or 24,000 miles. Honda will pay for oil changes, tire rotations, air filter replacements, cabin filter replacement, brake fluid replacement, inspections, and any other required maintenance. Acura doesn’t pay scheduled maintenance for the ILX.

There are almost 4 times as many Honda dealers as there are Acura dealers, which makes it much easier should you ever need service under the Civic Si’s warranty.

Reliability

J.D. Power and Associates’ 2023 Initial Quality Study of new car owners surveyed provide the statistics that show that Honda vehicles are better in initial quality than Acura vehicles. J.D. Power ranks Honda above average in initial quality. With 17 more problems per 100 vehicles, Acura is rated below average.

J.D. Power and Associates’ 2022 survey of the owners of three-year-old vehicles provides the long-term dependability statistics that show that Honda vehicles are more reliable than Acura With 14 fewer problems per 100 vehicles in the first three years of ownership, J.D. Power ranks Honda higher than Acura.

From surveys of all its subscribers, Consumer Reports’ January 2023 Auto Issue reports that Honda vehicles are more reliable than Acura vehicles. Consumer Reports ranks Honda 3 places higher in reliability than Acura.

Engine

The Civic Si’s 1.5 turbo 4-cylinder produces 12 lbs.-ft. more torque (192 vs. 180) than the ILX’s 2.4 DOHC 4-cylinder.

Fuel Economy and Range

On the EPA test cycle the Civic Si gets better fuel mileage than the ILX (27 city/37 hwy vs. 24 city/34 hwy).

The Civic Si has a standard cap-less fueling system. The fuel filler is automatically opened when the fuel nozzle is inserted and automatically closed when it’s removed. This eliminates the need to unscrew and replace the cap and it reduces fuel evaporation, which causes pollution. The ILX doesn’t offer a cap-less fueling system.

Environmental Friendliness

In its Green Vehicle Guide, the U.S. Environmental Protection Agency (EPA) rates the Honda Civic Si higher (6 out of 10) than the Acura ILX (3). This means the Civic Si produces up to 23.4 pounds less smog-producing pollutants than the ILX every 15,000 miles.

Brakes and Stopping

The Civic Si stops much shorter than the ILX:

	Civic Si	ILX
70 to 0 MPH	156 feet	184 feet	Car and Driver

Tires and Wheels

For better traction, the Civic Si has larger tires than the ILX (235/40R18 vs. 215/45R17). The Civic Si’s tires are larger than the largest tires available on the ILX (235/40R18 vs. 225/40R18).

The Civic Si’s tires provide better handling because they have a lower 40 series profile (height to width ratio) that provides a stiffer sidewall than the ILX’s standard 45 series tires.

For better ride, handling and brake cooling the Civic Si has standard 18-inch wheels. Smaller 17-inch wheels are standard on the ILX.

Suspension and Handling

For a smoother ride and more stable handling, the Civic Si’s wheelbase is 2.6 inches longer than on the ILX (107.7 inches vs. 105.1 inches).

For better handling and stability, the track (width between the wheels) on the Civic Si is 1.1 inches wider in the front and 1.5 inches wider in the rear than on the ILX.

The Civic Si’s front to rear weight distribution is more even (60.6% to 39.4%) than the ILX’s (63% to 37%). This gives the Civic Si more stable handling and braking.

The Civic Si handles at .97 G’s, while the ILX A-SPEC pulls only .83 G’s of cornering force in a Car and Driver skidpad test.

Chassis

To almost totally eliminate engine vibration in the passenger area, the Civic Si has a liquid-filled front engine mount. The liquid helps further dampen engine harshness. The ILX uses conventional solid rubber engine mounts.

Passenger Space

Because it has more passenger and cargo room, the EPA rates the Civic Si a Mid-size car, while the ILX is rated a Compact.

The Civic Si has 7.3 cubic feet more passenger volume than the ILX (96.6 vs. 89.3).

The Civic Si has 4 inches more front hip room, 1.4 inches more front shoulder room, 1.2 inches more rear headroom, 3.4 inches more rear legroom and 2.4 inches more rear shoulder room than the ILX.

Cargo Capacity

The Civic Si has a much larger trunk than the ILX (14.4 vs. 12.4 cubic feet).

The Civic Si’s standard folding rear seats are split to accommodate bulky cargo. The ILX’s standard single piece folding rear seat is not as flexible; long cargo and a passenger can’t share the rear seat.

Ergonomics

The Civic Si’s power parking brake sets with one touch and releases with one touch or automatically. The ILX has a lever-type parking brake that has to be strenuously raised to engage properly. It has to be lifted up more and a button depressed to release it.

The Insurance Institute for Highway Safety (IIHS) conducts detailed tests on headlights for their range both straight ahead and in curves and to be certain they don’t exceed acceptable amounts of glare to oncoming drivers. The Civic Si’s headlights were rated “Good” by the IIHS, while the ILX’s headlights are rated “Poor.”

While driving with high beams on, sensitive light sensors standard on the Civic Si detect other vehicles which could be blinded and automatically switch to low beams. The ILX doesn’t offer automatic dimming high beams.

Recommendations

Consumer Reports® recommends the Honda Civic Si, based on reliability, safety and performance.

The Civic was chosen as a Car and Driver’s “Top Ten” for 2023 and 8 more times in the last 39 years. The ILX has never been chosen by Car and Driver in their “10Best” issue.

The Honda Civic outsold the Acura ILX by over 21 to one during 2022.

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