Lithia Auto Stores

Compare the2024 BMW 4 Series CoupeVS 2023 Porsche 718 Cayman

2024 BMW 4 Series Coupe
2023 Porsche 718 Cayman

Safety

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The 4 Series Coupe’s pre-crash front seatbelts will tighten automatically in the event the vehicle detects an impending crash, improving protection against injury significantly. The 718 Cayman doesn’t offer pre-crash pretensioners.

The 4 Series Coupe’s standard pretensioning seatbelts also sense rear collisions and remove slack from the front seatbelts to help protect the occupants from whiplash and other injuries. The 718 Cayman doesn’t offer a whiplash protection system.

The 4 Series Coupe has a standard PostCrash iBrake, which automatically applies the brakes in the event of a crash to help prevent secondary collisions and prevent further injuries. The 718 Cayman doesn’t offer a post collision braking system: in the event of a collision that triggers the airbags, more collisions are possible without the protection of airbags that may have already deployed.

Over 200 people are killed each year when backed over by motor vehicles. The 4 Series Coupe offers an optional Active Park Distance Control that uses rear sensors to monitor for objects to the rear and automatically applies the brakes to prevent a collision. The 718 Cayman doesn’t offer backup collision prevention brakes.

The 4 Series Coupe offers all-wheel drive to maximize traction under poor conditions, especially in ice and snow. The 718 Cayman doesn’t offer all-wheel drive.

The 4 Series Coupe’s 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 718 Cayman doesn’t offer a lane departure warning system.

The 4 Series Coupe offers an optional Surround View to allow the driver to see objects all around the vehicle on a screen. The 718 Cayman only offers a rear monitor and front and rear parking sensors that beep or flash a light. That doesn’t help with obstacles to the sides.

The 4 Series Coupe has a standard blind spot warning system that uses sensors to alert the driver to objects in the vehicle’s blind spots where the side view mirrors don’t reveal them and moves the vehicle back into its lane. A system to reveal vehicles in the 718 Cayman’s blind spot costs extra.

To help make backing out of a parking space safer, the 4 Series Coupe’s standard Cross Traffic Warning uses sensors in the rear to alert the driver to vehicles approaching from the side, helping the driver avoid collisions. The 718 Cayman doesn’t offer a rear cross-path warning system.

The 4 Series Coupe’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 718 Cayman doesn’t offer a driver alert monitor.

Both the 4 Series Coupe and the 718 Cayman have standard driver and passenger frontal airbags, front side-impact airbags, driver and front passenger knee airbags, side-impact head airbags, front seatbelt pretensioners, four-wheel antilock brakes, traction control, electronic stability systems to prevent skidding, daytime running lights and rearview cameras.

Warranty

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BMW pays for scheduled maintenance on the 4 Series Coupe for 2 years and 26000 miles longer than Porsche pays for maintenance for the 718 Cayman (3/36,000 vs. 1/10,000).

There are over 80 percent more BMW dealers than there are Porsche dealers, which makes it much easier should you ever need service under the 4 Series Coupe’s warranty.

Reliability

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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 4 Series Coupe’s reliability 28 points higher than the 718 Cayman.

Engine

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The 4 Series Coupe has more powerful engines than the 718 Cayman:

Torque

430i Coupe 2.0 turbo 4-cylinder

295 lbs.-ft.

M440i Coupe 3.0 turbo 6-cylinder hybrid

369 lbs.-ft.

718 Cayman 2.0 turbo 4-cylinder

280 lbs.-ft.

718 Cayman S 2.5 turbo 4-cylinder

309 lbs.-ft.

718 Cayman GTS 4.0 4.0 GT3 6-cylinder

309 lbs.-ft.

718 Cayman GT4 4.0 GT3 6-cylinder

309 lbs.-ft.

718 Cayman GT4 RS 4.0 DOHC 6-cylinder

331 lbs.-ft.

As tested in Car and Driver the M440i Coupe 3.0 turbo 6-cylinder hybrid is faster than the Porsche 718 Cayman turbo 4 cyl. (automatics tested):

4 Series Coupe

718 Cayman

Zero to 60 MPH

3.8 sec

4.3 sec

Zero to 100 MPH

9.6 sec

10.6 sec

5 to 60 MPH Rolling Start

4.6 sec

5.5 sec

Quarter Mile

12.3 sec

12.8 sec

Speed in 1/4 Mile

112 MPH

110 MPH

Fuel Economy and Range

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On the EPA test cycle the 4 Series Coupe gets better mileage than the 718 Cayman:

MPG

4 Series Coupe

RWD

Auto

3.0 turbo 6-cyl. Hybrid

24 city/32 hwy

2.0 turbo 4-cyl.

25 city/34 hwy

AWD

Auto

3.0 turbo 6-cyl. Hybrid

22 city/31 hwy

2.0 turbo 4-cyl.

23 city/33 hwy

718 Cayman

RWD

Manual

T 2.0 turbo flat-4

20 city/26 hwy

2.0 turbo flat-4

20 city/25 hwy

2.5 turbo flat-4

19 city/24 hwy

GTS 4.0 DOHC flat-6

17 city/24 hwy

GT4 4.0 DOHC flat-6

17 city/23 hwy

Auto

2.0 turbo flat-4

21 city/27 hwy

2.5 turbo flat-4

19 city/25 hwy

GTS 4.0 DOHC flat-6

19 city/24 hwy

GT4 4.0 DOHC flat-6

18 city/24 hwy

GT4 RS 4.0 DOHC flat-6

15 city/19 hwy

The 4 Series Coupe has 1.4 gallons more fuel capacity than the 718 Cayman’s standard fuel tank (15.6 vs. 14.2 gallons), for longer range between fill-ups.

Environmental Friendliness

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In its Green Vehicle Guide, the U.S. Environmental Protection Agency (EPA) rates the BMW 4 Series Coupe higher (5 to 7 out of 10) than the Porsche 718 Cayman (1 to 5). This means the 4 Series Coupe produces up to 47 pounds less smog-producing pollutants than the 718 Cayman every 15,000 miles.

Transmission and Drivetrain

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The BMW 4 Series Coupe comes standard with an automatic transmission, for driver comfort, especially in the city. Automatic costs extra on the 718 Cayman.

An eight-speed automatic is standard on the BMW 4 Series Coupe, for better acceleration and lower engine speed on the highway. Only a seven-speed automatic is available for the 718 Cayman.

All wheel drive, available in the 4 Series Coupe, provides the best traction for acceleration in wet, dry, and icy conditions. In corners, all wheel drive allows both outside wheels to provide power, balancing the car. This allows for better handling. The Porsche 718 Cayman is not available with all wheel drive.

Brakes and Stopping

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The 4 Series Coupe stops shorter than the 718 Cayman:

4 Series Coupe

718 Cayman

70 to 0 MPH

148 feet

149 feet

Car and Driver

Tires and Wheels

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Changing a flat tire near traffic can be dangerous and inconvenient. The run-flat tires available on the 4 Series Coupe can be driven up to 50 miles without any air pressure, allowing you to drive to a service station for a repair. The 718 Cayman doesn’t offer run-flat tires.

Suspension and Handling

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For a smoother ride and more stable handling, the 4 Series Coupe’s wheelbase is 14.8 inches longer than on the 718 Cayman (112.2 inches vs. 97.4 inches).

For better handling and stability, the track (width between the wheels) on the 4 Series Coupe is 2.2 inches wider in the front and 2.2 inches wider in the rear than the average track on the 718 Cayman.

The 4 Series Coupe’s front to rear weight distribution is more even (51.7% to 48.3%) than the 718 Cayman’s (44.7% to 55.3%). This gives the 4 Series Coupe more stable handling and braking.

Chassis

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The design of the BMW 4 Series Coupe amounts to more than styling. The 4 Series Coupe offers aerodynamic coefficients of drag from .25 to .3 Cd (depending on bodystyle and options). That is lower than the 718 Cayman (.3 to .34). A more efficient exterior helps the 4 Series Coupe go faster and keeps the interior quieter. It also helps the 4 Series Coupe get better fuel mileage.

Passenger Space

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The 4 Series Coupe has standard seating for 4 passengers; the 718 Cayman can only carry 2.

The 4 Series Coupe has 38 cubic feet more passenger volume than the 718 Cayman (86 vs. 48).

Cargo Capacity

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With its coupe body style, valet key, locking rear seatbacks and remote trunk release lockout, the 4 Series offers cargo security. The 718 Cayman’s hatchback body style and non-lockable remote release defeat cargo security.

To make loading and unloading groceries and cargo easier, especially for short adults, the 4 Series Coupe offers an optional power trunk, which opens and closes automatically by pressing a button, or optionally by just waving your foot, completely leaving your hands free. The 718 Cayman doesn’t offer a power trunk, so its trunk has to be closed manually.

Ergonomics

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The 4 Series Coupe 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 718 Cayman doesn’t offer a remote starting system.

The 4 Series Coupe offers an optional heads-up display that projects speed, tachometer, warning and navigation instruction readouts in front of the driver’s line of sight, allowing drivers to view information without diverting their eyes from the road. The 718 Cayman doesn’t offer a heads-up display.

If the windows are left open on the 4 Series Coupe the driver can close them all at the outside door handle. On a hot day the driver can lower the windows from a distance using the keyless remote. The driver of the 718 Cayman can only operate the windows from inside the vehicle, with the ignition on.

The 4 Series Coupe’s power window, power lock, power mirror and cruise control switches are lit from behind, making them plainly visible and easier to operate at night. The 718 Cayman’s cruise control switches are unlit, making them difficult to find at night and operate safely.

The 4 Series Coupe’s LED headlights produce a white, bright light using less electricity than the 718 Cayman’s standard xenon high intensity discharge (HID) headlights. HID headlights can be slow to reach full brightness or power cycle, causing issues when flashing them to signal other vehicles; LED headlights light instantly. LED lights also last about three to four times as long.

To shield the driver and front passenger’s vision over a larger portion of the windshield and side windows, the 4 Series Coupe has standard extendable sun visors. The 718 Cayman doesn’t offer extendable visors.

To quickly and conveniently keep personal devices charged without cables tangling and wearing out, the BMW 4 Series offers an optional wireless phone charging system (Qi) in the center console. The 718 Cayman doesn’t offer wireless personal charging.

The 4 Series Coupe’s optional Parking Assistant Plus can parallel park or back into a parking spot by itself, starting, stopping and changing direction automatically. The 718 Cayman doesn’t offer an automated parking system.

Model Availability

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The BMW 4 Series comes in coupe, convertible and four door hatchback bodystyles; the Porsche 718 isn’t available as a four door.

Recommendations

© 1999 - 2024Advanta-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 (“Advanta-STAR”). 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. Removal of this watermark/notification without prior written license and approval received from Advanta-STAR is an agreement, understanding, and/or stipulation by the person(s), entities, agents, attorneys, and any other persons involved in the removal of this watermark/notification (including but not limited to Search Optics, LLC and any and all parent entities, sister entities, and subsidiary entities of Search Optics, LLC and/or any other entity, agent, attorney, and persons related in any manner to Search Optics, LLC) to: 1) an agreed upon amount of liquidated monetary damages of a minimum of $1,250,000.00 US Dollars in favor of Advanta-STAR; 2) the jurisdiction and enforcement of any legal claims associated with this matter asserted by Advanta-STAR in the United States Federal District Court in Portand, Oregon; and 3) service of process of any legal claims asserted by Advanta-STAR associated with this matter may be accomplished by First-Class Postage by the United States Postal Service or comparable service. XPYNN-M34HG 2a06:98c0:3600::103 2024/11/10

The BMW 4 Series outsold the Porsche 718 by over 15 to one during 2022.

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