2025 Porsche 718 Cayman vs 2026 BMW 4 Series

$72,800 · Coupe

$52,600 · Coupe

Comparison Overview

The most significant quantifiable difference is the $20,200 MSRP gap, with the 2026 BMW 4 Series starting at $52,600 versus the 2025 Porsche 718 Cayman at $72,800. Despite the lower cost, the BMW achieves a respectable 255 hp, which trails the Cayman's 300 hp output by 45 horsepower. However, the BMW counters with 295 lb-ft of torque, exceeding the Porsche's 280 lb-ft. In terms of footprint, the BMW 4 Series is substantially longer at 187.9 inches compared to the Cayman's 172.4 inches. While neither vehicle offers exceptional fuel economy, the Cayman achieves 24 combined MPG, marginally better than the presumed efficiency of the 4 Series given its power output. Cargo space is nearly identical, with the BMW offering 15.5 cu ft against the Porsche's 15 cu ft.

Size Comparison

Performance

Fuel Efficiency

Full Specifications

Our Verdicts

🚗 Best for Commuters

2026 BMW 4 Series

The BMW 4 Series offers a more reasonable premium entry point at $52,600 and has a slightly larger 15.5 cu ft cargo capacity compared to the Cayman's 15 cu ft.

👨‍👩‍👧‍👦 Best for Families

2026 BMW 4 Series

The 2026 BMW 4 Series is slightly longer and wider, providing marginally more interior volume, despite both being strictly two-door coupes.

🏎️ Best for Enthusiasts

2025 Porsche 718 Cayman

The 2025 Porsche 718 Cayman delivers superior peak power with 300 hp and utilizes a focused 7-speed automated manual transmission.

💰 Best Value

2026 BMW 4 Series

The BMW 4 Series provides 295 lb-ft of torque and significantly lower entry cost, offering substantial performance credibility for $20,200 less than the Cayman.

Choose the Porsche 718 Cayman if...

Peak performance is the absolute priority, evidenced by its 300 hp output.
The driver prefers the tactile engagement of a 7-speed automated manual transmission over an 8-speed automatic.
A shorter overall vehicle length of 172.4 inches is beneficial for tight parking situations.

Choose the BMW 4 Series if...

Budget adherence is critical, due to the $52,600 MSRP compared to $72,800 for the Porsche.
Maximizing torque output is preferred, as it achieves 295 lb-ft versus the Cayman's 280 lb-ft.
The driver requires a slightly larger physical footprint, with a length of 187.9 inches and 54.6 inches in height.

Key Dimensions

Dimension	Porsche 718 Cayman	BMW 4 Series
Length	172.4"	187.9"
Width	70.9"	72.9"
Height	51.0"	54.6"
Wheelbase	97.4"	112.2"

Features Comparison

Safety

Feature	Porsche	BMW
Post-Collision Safety System	✓	✓
Dual Front Side-Mounted Airbags	✓	✓
Front Head Airbags	✓	✓
Passenger Airbag Occupant Sensing Deactivation	✓	✓
Electronic Stability Control	✓	✓
Traction Control System	✓	✓
Anti-lock Brakes (ABS)	4-Wheel	4-Wheel
Front Ventilated Disc Brakes	✓	✓
Rear Ventilated Disc Brakes	✓	✓
Brake Preparation System	✓	✓
Brake Assist	✓	✓
Tire Pressure Monitoring System	✓	✓
Automatic Headlights	✓	✓
Headlight Delay-Off	✓	✓
Xenon High-Intensity Discharge Headlights	✓	—
Adaptive Headlights	✓	—
Daytime Running Lights	✓	✓
Cornering Lights	✓	—
Headlight Washers	✓	—
Front Headrests	2	2
Front Integrated Headrests	✓	—
Anti-Theft Alarm System (Remote)	✓	✓
Engine Immobilizer	✓	✓
Blind Spot Monitor	—	✓
Lane Departure Warning	—	✓
Lane Keeping Assist System	—	✓
Rear Cross Traffic Alert	—	✓
Driver Attention Alert	—	✓
Pre-Collision Safety System	—	✓
Rear Head Airbags	—	✓
LATCH System	—	✓
Brake Drying	—	✓
LED Headlights	—	✓
Self-Leveling Headlights	—	✓
Integrated Turn Signal Mirrors	—	✓
Front Height Adjustable Headrests	—	✓
Rear Headrests	—	2
Rear Integrated Headrests	—	✓

Engine

Feature	Porsche	BMW
Base Engine Displacement	2.0 L	2.0 L
Number of Cylinders	flat 4	inline 4
Base Engine Type	gas	mild hybrid
Horsepower	300 hp @ 6500 rpm	255 hp @ 4700 rpm
Torque	280 lb-ft @ 1950 rpm	295 lb-ft @ 1600 rpm
Number of Valves	16	16
Camshaft Type	Double overhead cam (DOHC)	Double overhead cam (DOHC)
Variable Valve Timing	Variable	Variable
Fuel Injection Type	✓	✓

Drive Train

Feature	Porsche	BMW
Transmission Type	7-speed automated manual	8-speed shiftable automatic
Drivetrain Type	rear wheel drive	rear wheel drive

Fuel

Feature	Porsche	BMW
Fuel Type	premium unleaded (required)	premium unleaded (required)
EPA Fuel Economy (City/Highway)	21/27 MPG	—
EPA Fuel Economy (Combined)	24 MPG	—
EPA Driving Range (City/Highway)	298.2/383.4 mi.	0/0 mi.
Fuel Tank Capacity	14.2 gal.	15.5 gal.

Comfort & Convenience

Feature	Porsche	BMW
Tilt and Telescopic Steering Wheel	✓	✓
Transmission Controls on Steering Wheel	✓	✓
Electric Power Steering	✓	✓
Rear View Camera	✓	✓
Front Parking Sensors	✓	✓
Rear Parking Sensors	✓	✓
Cruise Control	✓	✓
Universal Remote Transmitter	✓	✓
Front Cupholders	✓	✓
Front Door Pockets	✓	✓
Leather Steering Wheel	✓	—
Dual Zone Climate Control	✓	✓
Interior Air Filtration	✓	✓
Dual Vanity Mirrors	✓	✓
Auto-Dimming Rearview Mirror	✓	✓
Push Button Start	—	✓
Cruise Control on Steering Wheel	—	✓
Audio Controls on Steering Wheel	—	✓
Wireless Charging Pad	—	✓
Rear Cupholders	—	✓
Front Seatback Storage	—	✓
Rear Ventilation Ducts	—	✓
Turn Signal Indicators in Mirrors	—	✓

In Car Entertainment

Feature	Porsche	BMW
AM/FM Stereo	✓	✓
Stereo Power	150W	205W
Speaker System	8	10
Apple CarPlay (Wired)	✓	—
USB Port	✓	✓
USB Port with External Media Control	✓	✓
Memory Card Slot	✓	—
Satellite Radio	✓	✓
Satellite Radio Trial Period	3 months	12 months
Infotainment Display	—	14.9 in
Subwoofer Count	—	2
Android Auto (Wireless)	—	✓
Apple CarPlay (Wireless)	—	✓

Power Feature

Feature	Porsche	BMW
One-Touch Power Windows	2	2
Remote Keyless Entry	✓	—
Heated Mirrors	✓	✓
Moonroof Type	—	1st Row Power Glass
Keyless Entry	—	✓
Reverse Tilt Passenger Mirror	—	✓

Frontseats

Feature	Porsche	BMW
Seat Material: Leather	✓	—
Front Seat Type: Sport	✓	✓
Driver Seat Power Adjustments	2-way	10-way
Driver Seat Manual Adjustments	4-way	2-way
Driver Seat Height Adjustment	✓	✓
Passenger Seat Power Adjustments	2-way	10-way
Passenger Seat Manual Adjustments	4-way	2-way
Passenger Seat Height Adjustment	✓	✓
Driver Seat Heating	Multi-level	Multi-level
Passenger Seat Heating	Multi-level	Multi-level
Front Head Room	—	38.0 in.
Front Leg Room	—	41.8 in.
Front Shoulder Room	—	55.1 in.
Seat Material: Leatherette	—	✓
Driver Seat Lumbar Support	—	Power
Driver Seat Thigh Extension	—	✓
Driver Seat Memory Settings	—	2
Passenger Seat Lumbar Support	—	Power
Passenger Seat Thigh Extension	—	✓

Rearseats

Feature	Porsche	BMW
Rear Head Room	—	35.2 in.
Rear Leg Room	—	34.5 in.
Rear Shoulder Room	—	51.0 in.
Split-Folding Rear Seatback	—	✓
Folding Center Armrest	—	✓

Tires and Wheels

Feature	Porsche	BMW
Wheel Material	Alloy	—
Wheel Size	18 x 9.5 in.	18 x 7.5 in
Tire Type	Performance	—
Tire Size	265/45R Z	225/45R18
Wheel Finish	—	Painted Alloy
Run Flat Tires	—	✓

Suspension

Feature	Porsche	BMW
Four-Wheel Independent Suspension	✓	✓
Front Stabilizer Bar	✓	✓
Rear Stabilizer Bar	✓	✓

Warranty

Feature	Porsche	BMW
Basic Warranty	4 yr./ 50000 mi.	4 yr./ 50000 mi.
Drivetrain Warranty	4 yr./ 50000 mi.	4 yr./ 50000 mi.
Corrosion/Rust Warranty	12 yr./ unlimited mi.	12 yr./ unlimited mi.
Roadside Assistance	4 yr./ 50000 mi.	4 yr./ unlimited mi.
Hybrid Component Warranty	—	8 yr./ 100000 mi.
Complimentary Scheduled Maintenance	—	3 yr./ 36000 mi.

Frequently Asked Questions

Common questions about comparing the 2025 Porsche 718 Cayman and 2026 BMW 4 Series.

What is the primary performance tradeoff between these two coupes?

The 2025 Porsche 718 Cayman offers a 45 hp advantage, producing 300 hp, indicating better high-end acceleration. Conversely, the 2026 BMW 4 Series leads in low-end grunt with 295 lb-ft of torque, beating the Cayman by 15 lb-ft.

How do the drivetrains differ mechanically?

The Porsche utilizes a 7-speed automated manual transmission optimized for faster shifts, while the BMW employs an 8-speed shiftable automatic. Both vehicles mandate the use of premium unleaded fuel.

Is there a noticeable difference in exterior dimensions?

Yes, the 2026 BMW 4 Series is significantly longer at 187.9 inches, measuring 15.5 inches longer than the 172.4-inch Porsche 718 Cayman. The BMW is also taller by 3.6 inches.

Which vehicle presents a better value proposition based on initial pricing?

The BMW 4 Series is the clear value winner, costing $20,200 less than the Cayman at $52,600. This significant saving allows buyers to acquire a premium RWD coupe for substantially less capital.

How does the fuel efficiency compare, given they both require premium fuel?

The Porsche 718 Cayman holds a slight advantage in efficiency, achieving a combined 24 MPG (21 city/27 highway). Specific MPG figures for the 2026 BMW 4 Series were not provided, but its performance profile suggests it may trail the Cayman slightly.