2025 BMW Z4 vs 2025 Porsche 718 Boxster
Comparison Overview
The primary financial divergence between the 2025 BMW Z4 and the 2025 Porsche 718 Boxster is the MSRP, with the Z4 priced at $54,500, representing a substantial $20,400 saving over the Boxster's $74,900 starting price. Despite the lower cost, the Z4 achieves a superior combined fuel economy of 28 MPG compared to the Boxster's 24 MPG, offering 4 MPG better efficiency. Performance metrics show the Boxster holding the advantage with 300 hp versus the Z4's 255 hp, though the Z4 counters with slightly more torque at 295 lb-ft to the Boxster's 280 lb-ft. Dimensionally, both roadsters are comparable, with the Boxster being slightly longer at 172.4 inches versus the Z4's 170.7 inches, while cargo capacities are nearly identical at 9.9 cu ft (Z4) and 9.7 cu ft (Boxster). The Z4 offers a clearer economic case based on initial outlay and operational efficiency.
Size Comparison
Performance
Fuel Efficiency
Full Specifications
Our Verdicts
2025 BMW Z4
The BMW Z4 offers a superior 28 combined MPG versus the Boxster's 24 MPG, reducing daily running costs.
2025 BMW Z4
As both lack practicality, the Z4 wins due to its significantly lower $54,500 MSRP compared to the Boxster's $74,900 entry price.
2025 Porsche 718 Boxster
The Porsche 718 Boxster provides higher peak output with 300 hp and utilizes a dedicated 7-speed automated manual transmission.
2025 BMW Z4
The Z4 is $20,400 less expensive while delivering 255 hp and better fuel economy figures.
Choose the BMW Z4 if...
- Budget is a primary constraint, given the $20,400 lower MSRP ($54,500 vs $74,900).
- Maximizing fuel efficiency is desired, as the Z4 achieves 28 combined MPG.
- A preference exists for slightly higher torque figures (295 lb-ft vs 280 lb-ft).
Choose the Porsche 718 Boxster if...
- Achieving the highest horsepower figure (300 hp) is the main priority.
- A desire exists for a 7-speed automated manual transmission over an 8-speed shiftable automatic.
- The vehicle will be used strictly for performance driving where the higher power output offsets the cost and MPG penalty.
Key Dimensions
| Dimension | BMW Z4 | Porsche 718 Boxster |
|---|---|---|
| Length | 170.7" | 172.4" |
| Width | 73.4" | 70.9" |
| Height | 51.4" | 50.4" |
| Wheelbase | 97.2" | 97.4" |
Features Comparison
Safety
| Feature | BMW | Porsche |
|---|---|---|
| Driver Attention Alert | ✓ | — |
| Pre-Collision Safety System | ✓ | — |
| Post-Collision Safety System | ✓ | ✓ |
| Dual Front Side-Mounted Airbags | ✓ | ✓ |
| Passenger Airbag Occupant Sensing Deactivation | ✓ | ✓ |
| Electronic Stability Control | ✓ | ✓ |
| Traction Control System | ✓ | ✓ |
| LATCH System | ✓ | — |
| Anti-lock Brakes (ABS) | 4-Wheel | 4-Wheel |
| Front Ventilated Disc Brakes | ✓ | ✓ |
| Rear Ventilated Disc Brakes | ✓ | ✓ |
| Brake Assist | ✓ | ✓ |
| Tire Pressure Monitoring System | ✓ | ✓ |
| Automatic Headlights | ✓ | ✓ |
| LED Headlights | ✓ | — |
| Self-Leveling Headlights | ✓ | — |
| Daytime Running Lights | ✓ | ✓ |
| Integrated Turn Signal Mirrors | ✓ | — |
| Front Headrests | 2 | 2 |
| Front Integrated Headrests | ✓ | ✓ |
| Anti-Theft Alarm System (Remote) | ✓ | ✓ |
| Engine Immobilizer | ✓ | ✓ |
| Front Head Airbags | — | ✓ |
| Brake Preparation System | — | ✓ |
| Headlight Delay-Off | — | ✓ |
| Xenon High-Intensity Discharge Headlights | — | ✓ |
| Adaptive Headlights | — | ✓ |
| Cornering Lights | — | ✓ |
| Headlight Washers | — | ✓ |
Engine
| Feature | BMW | Porsche |
|---|---|---|
| Base Engine Displacement | 2.0 L | 2.0 L |
| Number of Cylinders | inline 4 | flat 4 |
| Base Engine Type | gas | gas |
| Horsepower | 255 hp @ 5000 rpm | 300 hp @ 6500 rpm |
| Torque | 295 lb-ft @ 1500 rpm | 280 lb-ft @ 1950 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 | BMW | Porsche |
|---|---|---|
| Transmission Type | 8-speed shiftable automatic | 7-speed automated manual |
| Drivetrain Type | rear wheel drive | rear wheel drive |
Fuel
| Feature | BMW | Porsche |
|---|---|---|
| Fuel Type | premium unleaded (recommended) | premium unleaded (required) |
| EPA Fuel Economy (City/Highway) | 25/33 MPG | 21/27 MPG |
| EPA Fuel Economy (Combined) | 28 MPG | 24 MPG |
| EPA Driving Range (City/Highway) | 342.5/452.1 mi. | 300.3/386.1 mi. |
| Fuel Tank Capacity | 13.7 gal. | 14.3 gal. |
Comfort & Convenience
| Feature | BMW | Porsche |
|---|---|---|
| Push Button Start | ✓ | — |
| Tilt and Telescopic Steering Wheel | ✓ | ✓ |
| Transmission Controls on Steering Wheel | ✓ | ✓ |
| Cruise Control on Steering Wheel | ✓ | — |
| Audio Controls on Steering Wheel | ✓ | — |
| Electric Power Steering | ✓ | ✓ |
| Rear View Camera | ✓ | ✓ |
| Cruise Control | ✓ | ✓ |
| Universal Remote Transmitter | ✓ | ✓ |
| Front Cupholders | ✓ | ✓ |
| Front Door Pockets | ✓ | ✓ |
| Leather Steering Wheel | ✓ | ✓ |
| Dual Zone Climate Control | ✓ | ✓ |
| Interior Air Filtration | ✓ | ✓ |
| Auto-Dimming Rearview Mirror | ✓ | ✓ |
| Turn Signal Indicators in Mirrors | ✓ | — |
| Front Parking Sensors | — | ✓ |
| Rear Parking Sensors | — | ✓ |
| Dual Vanity Mirrors | — | ✓ |
In Car Entertainment
| Feature | BMW | Porsche |
|---|---|---|
| Infotainment Display | 10.3 in | — |
| AM/FM Stereo | ✓ | ✓ |
| Stereo Power | 205W | 110W |
| Speaker System | 10 | 6 |
| Subwoofer Count | 2 | — |
| Android Auto (Wireless) | ✓ | — |
| Apple CarPlay (Wireless) | ✓ | — |
| USB Port | ✓ | ✓ |
| USB Port with External Media Control | ✓ | ✓ |
| Satellite Radio | ✓ | ✓ |
| Satellite Radio Trial Period | 12 months | 3 months |
| Apple CarPlay (Wired) | — | ✓ |
| Memory Card Slot | — | ✓ |
Power Feature
| Feature | BMW | Porsche |
|---|---|---|
| One-Touch Power Windows | 2 | 2 |
| Remote Keyless Entry | ✓ | ✓ |
| Reverse Tilt Passenger Mirror | ✓ | — |
| Heated Mirrors | ✓ | ✓ |
Frontseats
| Feature | BMW | Porsche |
|---|---|---|
| Front Head Room | 38.9 in. | — |
| Front Leg Room | 42.2 in. | — |
| Front Shoulder Room | 54.3 in. | — |
| Seat Material: Leatherette | ✓ | — |
| Front Seat Type: Sport | ✓ | ✓ |
| Driver Seat Power Adjustments | 10-way | 2-way |
| Driver Seat Manual Adjustments | 2-way | 4-way |
| Driver Seat Height Adjustment | ✓ | ✓ |
| Driver Seat Thigh Extension | ✓ | — |
| Driver Seat Memory Settings | 2 | — |
| Passenger Seat Power Adjustments | 10-way | 2-way |
| Passenger Seat Manual Adjustments | 2-way | 4-way |
| Passenger Seat Height Adjustment | ✓ | ✓ |
| Passenger Seat Thigh Extension | ✓ | — |
| Driver Seat Heating | Multi-level | Multi-level |
| Passenger Seat Heating | Multi-level | Multi-level |
| Seat Material: Leather | — | ✓ |
Tires and Wheels
| Feature | BMW | Porsche |
|---|---|---|
| Wheel Finish | Painted Alloy | — |
| Wheel Size | 18 x 9.0 in. | 18 x 9.5 in. |
| Tire Type | Performance | Performance |
| Tire Size | 255/40R | 265/45R Z |
| Wheel Material | — | Alloy |
Suspension
| Feature | BMW | Porsche |
|---|---|---|
| Four-Wheel Independent Suspension | ✓ | ✓ |
| Front Stabilizer Bar | ✓ | ✓ |
| Rear Stabilizer Bar | ✓ | ✓ |
Warranty
| Feature | BMW | Porsche |
|---|---|---|
| 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./ unlimited mi. | 4 yr./ 50000 mi. |
| Complimentary Scheduled Maintenance | 3 yr./ 36000 mi. | — |
Frequently Asked Questions
Common questions about comparing the 2025 BMW Z4 and 2025 Porsche 718 Boxster.
What is the primary performance difference between the two convertibles?
The 2025 Porsche 718 Boxster boasts 300 hp, outperforming the 2025 BMW Z4's 255 hp rating. However, the Z4 generates slightly more rotational force with 295 lb-ft of torque compared to the Boxster's 280 lb-ft.
How significant is the cost difference when comparing MSRPs?
There is a significant $20,400 price disparity, with the BMW Z4 starting at $54,500 and the Porsche 718 Boxster beginning at $74,900.
Which vehicle offers better day-to-day fuel economy?
The BMW Z4 is clearly more efficient, delivering 28 combined MPG (25 city/33 highway), whereas the 718 Boxster manages only 24 combined MPG (21 city/27 highway).
Are the transmission types identical in these models?
No, the BMW Z4 utilizes an 8-speed shiftable automatic transmission. In contrast, the Porsche 718 Boxster is equipped with a 7-speed automated manual transmission, suggesting a different shift feel.
How do the exterior dimensions compare for parking and garaging?
The dimensions are very close; the Boxster is marginally longer at 172.4 inches versus the Z4’s 170.7 inches, but the Z4 is slightly wider (73.4 inches vs 70.9 inches).
Is there a difference in required fuel type between the Z4 and the Boxster?
Yes, the Z4 recommends premium unleaded fuel, but the Porsche 718 Boxster requires premium unleaded fuel, which is a key distinction for operational requirements.
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