2019 Ford Mustang vs. 2019 Honda Civic Si

Detailed Review, Specifications & Comparison

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Safety

The Mustang offers optional Pre-Collision Assist, which use forward mounted sensors to warn the driver of a possible collision ahead. If the driver doesn’t react and the system determines a collision is imminent, it automatically applies the brakes at full-force in order to reduce the force of the crash or avoid it altogether. The Civic Si doesn't offer collision warning or crash mitigation brakes.

The Mustang’s optional lane departure warning system alerts a temporarily inattentive driver when the vehicle begins to leave its lane and gently nudges the vehicle back towards its lane. The Civic Si doesn’t offer a lane departure warning system.

To help make backing safer, the Mustang Premium’s optional cross-path warning system uses wide-angle radar in the rear bumper to alert the driver to vehicles approaching from the side, helping the driver avoid collisions. The Civic Si doesn’t offer a cross-path warning system.

The Mustang’s optional 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 Civic Si doesn’t offer a driver alert monitor.

Both the Mustang and the Civic Si have standard driver and passenger frontal airbags, front side-impact airbags, front seatbelt pretensioners, four-wheel antilock brakes, traction control, electronic stability systems to prevent skidding, daytime running lights, rearview cameras, available blind spot warning systems and rear parking sensors.

The Ford Mustang weighs 636 to 1015 pounds more than the Honda Civic Si. The NHTSA advises that heavier cars are much safer in collisions than their significantly lighter counterparts. Crosswinds also affect lighter cars more.

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

 

Mustang

Civic Si

 

Driver

STARS

5 Stars

5 Stars

HIC

161

201

Neck Compression

31 lbs.

53 lbs.

 

Passenger

STARS

5 Stars

5 Stars

HIC

125

265

Chest Compression

.6 inches

.6 inches

Neck Injury Risk

23%

34%

Leg Forces (l/r)

47/13 lbs.

445/224 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 Ford Mustang is safer than the Honda Civic Si:

 

Mustang

Civic Si

 

Front Seat

STARS

5 Stars

5 Stars

HIC

117

204

Chest Movement

.7 inches

1 inches

Abdominal Force

142 G’s

252 G’s

Hip Force

259 lbs.

306 lbs.

 

Rear Seat

STARS

5 Stars

5 Stars

Spine Acceleration

58 G’s

68 G’s

 

Into Pole

STARS

5 Stars

5 Stars

Hip Force

651 lbs.

727 lbs.

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

Warranty

There are almost 3 times as many Ford dealers as there are Honda dealers, which makes it much easier should you ever need service under the Mustang’s warranty.

Reliability

The Mustang has a standard “limp home system” to keep drivers from being stranded if most or all of the engine’s coolant is lost. The engine will run on only half of its cylinders at a time, reduce its power and light a warning lamp on the dashboard so the driver can get to a service station for repairs. The Civic Si doesn’t offer a lost coolant limp home mode, so a coolant leak could strand you or seriously damage the car’s engine.

J.D. Power and Associates rated the Mustang first among midsize sporty cars in their 2018 Initial Quality Study. The Civic Si isn’t in the top three in its category.

J.D. Power and Associates’ 2018 Initial Quality Study of new car owners surveyed provide the statistics that show that Ford vehicles are better in initial quality than Honda vehicles. J.D. Power ranks Ford fifth in initial quality, above the industry average. With 21 more problems per 100 vehicles, Honda is ranked 23rd, below the industry average.

Engine

The Mustang’s standard 2.3 turbo 4 cyl. produces 105 more horsepower (310 vs. 205) and 158 lbs.-ft. more torque (350 vs. 192) than the Civic Si’s 1.5 turbo 4 cyl. The Mustang GT’s standard 5.0 DOHC V8 produces 255 more horsepower (460 vs. 205) and 228 lbs.-ft. more torque (420 vs. 192) than the Civic Si’s 1.5 turbo 4 cyl. The Mustang BULLITT’s standard 5.0 DOHC V8 produces 275 more horsepower (480 vs. 205) and 228 lbs.-ft. more torque (420 vs. 192) than the Civic Si’s 1.5 turbo 4 cyl.

As tested in Motor Trend the Mustang GT 5.0 DOHC V8 is faster than the Honda Civic Si (manual transmissions tested):

 

Mustang

Civic Si

Zero to 60 MPH

4.3 sec

6.8 sec

Quarter Mile

12.6 sec

15.2 sec

Speed in 1/4 Mile

113.5 MPH

92.6 MPH

Fuel Economy and Range

The Mustang EcoBoost’s standard fuel tank has 3.1 gallons more fuel capacity than the Civic Si (15.5 vs. 12.4 gallons), for longer range between fill-ups. The Mustang GT’s standard fuel tank has 3.6 gallons more fuel capacity than the Civic Si (16 vs. 12.4 gallons).

Transmission

The Mustang offers an optional automatic transmission, for driver comfort, especially in the city. The Civic Si doesn’t offer an automatic transmission.

The Mustang Manual’s launch control uses engine electronics to hold engine RPM’s precisely in order to provide the most stable and rapid acceleration possible, using all of the available traction. The Civic Si doesn’t offer launch control.

Brakes and Stopping

For better stopping power the Mustang’s brake rotors are larger than those on the Civic Si:

 

Mustang

Mustang GT

Civic Si

Front Rotors

12.6 inches

15 inches

12.3 inches

Rear Rotors

12.6 inches

13 inches

11.1 inches

The Mustang’s standard front and rear disc brakes are vented to help dissipate heat for shorter stops with less fading. The rear discs on the Civic Si are solid, not vented.

The Mustang stops much shorter than the Civic Si:

 

Mustang

Civic Si

 

60 to 0 MPH

94 feet

109 feet

Motor Trend

Tires and Wheels

For better traction, the Mustang GT’s optional tires are larger than the largest tires available on the Civic Si (305/30R19 vs. 235/40R18).

The Mustang GT’s optional tires provide better handling because they have a lower 30 series profile (height to width ratio) that provides a stiffer sidewall than the Civic Si’s optional 35 series tires.

For better ride, handling and brake cooling the Mustang Premium offers optional 20-inch wheels. The Civic Si’s largest wheels are only 19-inches.

The Mustang offers an optional space-saver spare tire so you can replace a flat tire and drive to have the flat repaired or replaced. A spare tire isn’t available on the Civic Si; it requires you to depend on roadside assistance and your vehicle will have to be towed.

Suspension and Handling

The Mustang has standard front and rear gas-charged shocks for better control over choppy roads. The Civic Si’s suspension doesn’t offer gas-charged shocks.

For better handling and stability, the track (width between the wheels) on the Mustang is 1.9 inches wider in the front and 3.9 inches wider in the rear than on the Civic Si.

The Mustang’s front to rear weight distribution is more even (54.7% to 45.3%) than the Civic Si’s (60.3% to 39.7%). This gives the Mustang more stable handling and braking.

The Mustang GT Premium Convertible handles at .96 G’s, while the Civic Si Sedan pulls only .94 G’s of cornering force in a Motor Trend skidpad test.

For better maneuverability, the Mustang’s turning circle is 1.3 feet tighter than the Civic Si’s (36.5 feet vs. 37.8 feet).

Chassis

The front grille of the Mustang (except Performance Pack) uses electronically controlled shutters to close off airflow and reduce drag when less engine cooling is needed. This helps improve highway fuel economy. The Civic Si doesn’t offer active grille shutters.

The Mustang uses computer-generated active noise cancellation to help remove annoying noise and vibration from the passenger compartment, especially at low frequencies. The Civic Si doesn’t offer active noise cancellation.

Passenger Space

The Mustang Fastback has 1.1 inches more front headroom, 2.8 inches more front legroom, .8 inches more front hip room and .3 inches more rear headroom than the Civic Si Coupe.

Cargo Capacity

The Mustang Fastback has a much larger trunk than the Civic Si Coupe (13.5 vs. 11.9 cubic feet).

A standard locking glovebox and optional locking center console keeps your small valuables safer in the Mustang. The Civic Si doesn’t offer locking storage for small valuables.

Towing

The Mustang has a 1000 lbs. towing capacity. The Civic Si has no towing capacity.

Servicing Ease

The engine in the Mustang is mounted longitudinally (North-South), instead of sideways, as in the Civic Si. This makes it easier to service and maintain, because the accessory belts are in front.

Ergonomics

The Mustang Auto offers a remote vehicle starting system, so the vehicle can be started from inside the driver's house. This allows the driver to comfortably warm up the engine before going out to the vehicle. The climate system will also automatically heat or cool the interior. The Civic Si doesn’t offer a remote starting system.

When three different drivers share the Mustang Premium, the optional memory system makes it convenient for all three. Each setting activates different, customized memories for the driver’s seat position, suspension setting, power steering assist and outside mirror angle. The Civic Si doesn’t offer a memory system.

The Mustang Premium’s optional easy entry system glides the driver’s seat back when the door is unlocked or the ignition is switched off, making it easier for the driver to get in and out. The Civic Si doesn’t offer an easy entry system.

The Mustang’s instruments include an oil pressure gauge and a temperature gauge – which could save your engine! Often ‘idiot lights’ don’t warn you until damage has been done. The Civic Si does not have an oil pressure gauge.

The Mustang’s standard speed-sensitive wipers speed up when the vehicle does, so that the driver doesn’t have to continually adjust the speed of the wipers. The Civic Si’s manually variable intermittent wipers have to be constantly adjusted. The Mustang’s optional wipers adjust their speed and turn on and off automatically according to the amount of rainfall on the windshield.

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

Standard air-conditioned seats in the Mustang Premium keep the driver and front passenger comfortable and take the sting out of hot seats in summer. The Civic Si doesn’t offer air-conditioned seats.

On extremely cold winter days, the Mustang Premium’s optional heated steering wheel provides comfort, allowing the driver to steer safely and comfortably before the car heater warms up. The Civic Si doesn’t offer a heated steering wheel.

To keep a safe, consistent following distance, the Mustang offers an optional Adaptive Cruise Control, which alters the speed of the vehicle without driver intervention. This allows the driver to use cruise control more safely without constantly having to disengage it when approaching slower traffic. The Civic Si doesn’t offer an adaptive cruise control.

The Mustang’s available GPS navigation system has a real-time traffic update feature that plots alternative routes to automatically bypass traffic problems. (Service not available in all areas.) The Civic Si’s available navigation system doesn’t offer real-time traffic updates.

Economic Advantages

Insurance will cost less for the Mustang owner. The Car Book by Jack Gillis rates the Mustang with a number “3” insurance rate while the Civic Si is rated higher at a number “10” rate.

According to The Car Book by Jack Gillis, the Mustang is less expensive to operate than the Civic Si because typical repairs cost much less on the Mustang than the Civic Si, including $42 less for a water pump, $418 less for a starter, $291 less for a fuel pump and $34 less for front struts.

Recommendations

J.D. Power and Associates rated the Mustang third among midsize sporty cars in owner reported satisfaction. This includes how well the vehicle performs and satisfies its owner’s expectations. The Civic Si isn’t in the top three.

© 1991-2018 Advanta-STAR Automotive Research. All rights reserved.

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