2020 Honda Civic Si vs. 2020 Ford Mustang

Detailed Review, Specifications & Comparison

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Safety

© 1999 - 2019 Advanta-STAR Automotive Research. All rights reserved. This vehicle comparison and all of the content in it are provided only by license from Advanta-STAR Automotive Research Corporation of America. If you are not a legally licensed user of this vehicle comparison, it is against federal law to access it, copy it, forward it or use it in any manner whatsoever. Any unauthorized use of this vehicle comparison is a violation of U.S. and international law and is punishable criminally and civilly. 6IUEX-0KENZ 45.55.47.189 2019/10/21

For enhanced safety, the front seat shoulder belts of the Honda Civic Si Sedan are height-adjustable to accommodate a wide variety of driver and passenger heights. A better fit can prevent injuries and the increased comfort also encourages passengers to buckle up. The Ford Mustang doesn’t offer height-adjustable seat belts.

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 Mustang’s airbags don’t have smart features and will always deploy full force.

Both the Civic Si and the Mustang 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 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 Ford Mustang:

Civic Si

Mustang

Driver

STARS

5 Stars

5 Stars

Neck Injury Risk

20%

23%

Neck Stress

176 lbs.

208 lbs.

Leg Forces (l/r)

192/350 lbs.

330/502 lbs.

Passenger

STARS

5 Stars

5 Stars

Chest Compression

.6 inches

.6 inches

Neck Stress

131 lbs.

172 lbs.

Neck Compression

46 lbs.

119 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 Ford Mustang:

Civic Si

Mustang

Rear Seat

STARS

5 Stars

5 Stars

HIC

404

422

Hip Force

356 lbs.

741 lbs.

Into Pole

STARS

5 Stars

5 Stars

Max Damage Depth

12 inches

13 inches

HIC

260

513

Spine Acceleration

37 G’s

39 G’s

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

Reliability

© 1999 - 2019 Advanta-STAR Automotive Research. All rights reserved. This vehicle comparison and all of the content in it are provided only by license from Advanta-STAR Automotive Research Corporation of America. If you are not a legally licensed user of this vehicle comparison, it is against federal law to access it, copy it, forward it or use it in any manner whatsoever. Any unauthorized use of this vehicle comparison is a violation of U.S. and international law and is punishable criminally and civilly. 6IUEX-0KENZ 45.55.47.189 2019/10/21

A reliable vehicle saves its owner time, money and trouble. Nobody wants to be stranded or have to be without a vehicle while it’s being repaired. Consumer Reports rates the Civic Si’s reliability 37 points higher than the Mustang.

From surveys of all its subscribers, Consumer Reports’ December 2018 Auto Issue reports that Honda vehicles are more reliable than Ford vehicles. Consumer Reports ranks Honda 3 places higher in reliability than Ford.

Fuel Economy and Range

© 1999 - 2019 Advanta-STAR Automotive Research. All rights reserved. This vehicle comparison and all of the content in it are provided only by license from Advanta-STAR Automotive Research Corporation of America. If you are not a legally licensed user of this vehicle comparison, it is against federal law to access it, copy it, forward it or use it in any manner whatsoever. Any unauthorized use of this vehicle comparison is a violation of U.S. and international law and is punishable criminally and civilly. 6IUEX-0KENZ 45.55.47.189 2019/10/21

On the EPA test cycle the Civic Si gets better fuel mileage than the Mustang Fastback:

MPG

Civic Si

Manual

1.5 turbo 4-cyl.

26 city/36 hwy

Mustang Fastback

Manual

2.3 turbo 4-cyl.

21 city/31 hwy

Performance 2.3 turbo 4-cyl.

20 city/27 hwy

5.0 DOHC V8

15 city/24 hwy

BULLIT 5.0 DOHC V8

15 city/24 hwy

Auto

2.3 turbo 4-cyl.

21 city/32 hwy

Performance 2.3 turbo 4-cyl.

20 city/28 hwy

5.0 DOHC V8

16 city/25 hwy

On the EPA test cycle the Civic Si gets better fuel mileage than the Mustang Convertible:

MPG

Civic Si

FWD

Manual

1.5 turbo 4-cyl.

26 city/36 hwy

Mustang Convertible

Manual

2.3 turbo 4-cyl.

20 city/28 hwy

Performance 2.3 turbo 4-cyl.

20 city/27 hwy

5.0 DOHC V8

14 city/21 hwy

Auto

2.3 turbo 4-cyl.

20 city/28 hwy

Performance 2.3 turbo 4-cyl.

20 city/28 hwy

5.0 DOHC V8

15 city/24 hwy

Brakes and Stopping

© 1999 - 2019 Advanta-STAR Automotive Research. All rights reserved. This vehicle comparison and all of the content in it are provided only by license from Advanta-STAR Automotive Research Corporation of America. If you are not a legally licensed user of this vehicle comparison, it is against federal law to access it, copy it, forward it or use it in any manner whatsoever. Any unauthorized use of this vehicle comparison is a violation of U.S. and international law and is punishable criminally and civilly. 6IUEX-0KENZ 45.55.47.189 2019/10/21

The Civic Si stops shorter than the Mustang:

Civic Si

Mustang

70 to 0 MPH

159 feet

165 feet

Car and Driver

60 to 0 MPH

106 feet

111 feet

Motor Trend

Tires and Wheels

© 1999 - 2019 Advanta-STAR Automotive Research. All rights reserved. This vehicle comparison and all of the content in it are provided only by license from Advanta-STAR Automotive Research Corporation of America. If you are not a legally licensed user of this vehicle comparison, it is against federal law to access it, copy it, forward it or use it in any manner whatsoever. Any unauthorized use of this vehicle comparison is a violation of U.S. and international law and is punishable criminally and civilly. 6IUEX-0KENZ 45.55.47.189 2019/10/21

The Civic Si’s standard tires provide better handling because they have a lower 40 series profile (height to width ratio) that provides a stiffer sidewall than the Mustang’s standard 55 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 Mustang.

Suspension and Handling

© 1999 - 2019 Advanta-STAR Automotive Research. All rights reserved. This vehicle comparison and all of the content in it are provided only by license from Advanta-STAR Automotive Research Corporation of America. If you are not a legally licensed user of this vehicle comparison, it is against federal law to access it, copy it, forward it or use it in any manner whatsoever. Any unauthorized use of this vehicle comparison is a violation of U.S. and international law and is punishable criminally and civilly. 6IUEX-0KENZ 45.55.47.189 2019/10/21

The Civic Si’s drift compensation steering can automatically compensate for road conditions which would cause the vehicle to drift from side to side, helping the driver to keep the vehicle straight more easily. The Mustang doesn’t offer drift compensation steering.

The Civic Si Sedan handles at .97 G’s, while the Mustang GT Premium Convertible pulls only .96 G’s of cornering force in a Motor Trend skidpad test.

The Civic Si Coupe handles at .97 G’s, while the Mustang GT Premium Fastback pulls only .96 G’s of cornering force in a Car and Driver skidpad test.

Chassis

© 1999 - 2019 Advanta-STAR Automotive Research. All rights reserved. This vehicle comparison and all of the content in it are provided only by license from Advanta-STAR Automotive Research Corporation of America. If you are not a legally licensed user of this vehicle comparison, it is against federal law to access it, copy it, forward it or use it in any manner whatsoever. Any unauthorized use of this vehicle comparison is a violation of U.S. and international law and is punishable criminally and civilly. 6IUEX-0KENZ 45.55.47.189 2019/10/21

The Honda Civic Si may be more efficient, handle and accelerate better because it weighs about 650 to 1000 pounds less than the Ford Mustang.

The Civic Si Coupe is 11.2 inches shorter than the Mustang, making the Civic Si easier to handle, maneuver and park in tight spaces.

As tested by Car and Driver, the interior of the Civic Si Coupe is quieter than the Mustang GT Fastback:

Civic Si

Mustang

At idle

40 dB

45 dB

Full-Throttle

84 dB

88 dB

70 MPH Cruising

72 dB

74 dB

Passenger Space

© 1999 - 2019 Advanta-STAR Automotive Research. All rights reserved. This vehicle comparison and all of the content in it are provided only by license from Advanta-STAR Automotive Research Corporation of America. If you are not a legally licensed user of this vehicle comparison, it is against federal law to access it, copy it, forward it or use it in any manner whatsoever. Any unauthorized use of this vehicle comparison is a violation of U.S. and international law and is punishable criminally and civilly. 6IUEX-0KENZ 45.55.47.189 2019/10/21

Because it has more passenger and cargo room, the EPA rates the Civic Si Coupe a Compact car, while the Mustang Fastback is rated a Subcompact.

The Civic Si has standard seating for 5 passengers; the Mustang can only carry 4.

The Civic Si Coupe has 5.8 cubic feet more passenger volume than the Mustang Fastback (88.6 vs. 82.8).

The Civic Si Coupe has .6 inches more front shoulder room, 6.9 inches more rear legroom, .7 inches more rear hip room and .4 inches more rear shoulder room than the Mustang Fastback.

Ergonomics

© 1999 - 2019 Advanta-STAR Automotive Research. All rights reserved. This vehicle comparison and all of the content in it are provided only by license from Advanta-STAR Automotive Research Corporation of America. If you are not a legally licensed user of this vehicle comparison, it is against federal law to access it, copy it, forward it or use it in any manner whatsoever. Any unauthorized use of this vehicle comparison is a violation of U.S. and international law and is punishable criminally and civilly. 6IUEX-0KENZ 45.55.47.189 2019/10/21

The Civic Si’s power parking brake sets with one touch and releases with one touch or automatically. The Mustang 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 Civic Si’s standard power windows have a locking feature to keep children from operating them. Ford does not offer a locking feature on the Mustang’s standard power windows.

If the windows are left open on the Civic Si the driver can close them all at the outside door handle. On a hot day the driver can lower the windows at the outside door handle or from a distance using the keyless remote. The driver of the Mustang can only close the windows from inside the vehicle, with the ignition on.

The Civic Si has a standard locking fuel door with a remote release located convenient to the driver. A locking fuel door helps prevent vandalism, such as sugar in the tank and fuel theft. The Mustang doesn’t offer a locking fuel door.

The Civic Si’s standard outside mirrors include heating elements to clear off the mirrors for better visibility. Ford only offers heated mirrors on the Mustang Premium.

The Civic Si Sedan has a standard center folding armrest for the rear passengers. A center armrest helps make rear passengers more comfortable. The Mustang doesn’t offer a rear seat center armrest.

The Civic Si has a standard dual zone air conditioning allows the driver and front passenger to choose two completely different temperatures so people with different temperature preferences won’t have to compromise. This makes both the driver and front passenger as comfortable as possible. Dual zone air conditioning costs extra on the Mustang.

For greater rear passenger comfort, the Civic Si Sedan has standard rear heat vents to keep rear occupants more comfortable. The Mustang doesn’t offer rear vents.

Economic Advantages

© 1999 - 2019 Advanta-STAR Automotive Research. All rights reserved. This vehicle comparison and all of the content in it are provided only by license from Advanta-STAR Automotive Research Corporation of America. If you are not a legally licensed user of this vehicle comparison, it is against federal law to access it, copy it, forward it or use it in any manner whatsoever. Any unauthorized use of this vehicle comparison is a violation of U.S. and international law and is punishable criminally and civilly. 6IUEX-0KENZ 45.55.47.189 2019/10/21

Insurance will cost less for the Civic Si owner. The Complete Car Cost Guide estimates that insurance for the Civic Si will cost $595 less than the Mustang over a five-year period.

The Civic Si will cost the buyer less in the long run because of its superior resale value. The IntelliChoice estimates that the Civic Si will retain 54.01% to 55.27% of its original price after five years, while the Mustang only retains 41.34% to 54.88%.

According to The Car Book by Jack Gillis, the Civic Si is less expensive to operate than the Mustang because it costs $181 less to do the manufacturer’s suggested maintenance for 50,000 miles. Typical repairs cost much less on the Civic Si than the Mustang, including $624 less for a muffler, $60 less for front brake pads, $16 less for fuel injection, $260 less for a timing belt/chain and $762 less for a power steering pump.

IntelliChoice estimates that five-year ownership costs (depreciation, financing, insurance, fuel, fees, repairs and maintenance) for the Honda Civic Si will be $4177 to $25380 less than for the Ford Mustang.

Recommendations

© 1999 - 2019 Advanta-STAR Automotive Research. All rights reserved. This vehicle comparison and all of the content in it are provided only by license from Advanta-STAR Automotive Research Corporation of America. If you are not a legally licensed user of this vehicle comparison, it is against federal law to access it, copy it, forward it or use it in any manner whatsoever. Any unauthorized use of this vehicle comparison is a violation of U.S. and international law and is punishable criminally and civilly. 6IUEX-0KENZ 45.55.47.189 2019/10/21

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

The Civic was chosen as one of Automobile Magazine’s “All Stars” for 2 of the last 23 years. The Mustang has never been an “All Star.”

A group of representative automotive journalists from North America selected the Civic as the 2016 North American Car of the Year. The Mustang has never been chosen.

The Honda Civic outsold the Ford Mustang by over four to one during 2018.

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

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