VS
At a Glance
Power
335hp @ 5000
388hp @ 6500
Torque
368lb-ft @ 1600
332lb-ft @ 1950
Fuel
25 mpg est.
22 mpg est.
Engine
3.0 L/183ci
3.0 L/182ci
Choosing between the BMW 8 Series and the Porsche 911 is one of the most common decisions car buyers in the United States face. The BMW 8 Series delivers 335hp @ 5000 while the Porsche 911 produces 388hp @ 6500. On fuel, the 8 Series returns 25 mpg est. while the 911 uses 22 mpg est. — important in a market where fuel prices change monthly. Pricing starts at $94,500 for the 8 Series and $149,400 for the 911. Both vehicles have their merits. The right choice depends on your priorities: fuel economy, performance, towing ability, safety features or total cost of ownership. This comparison covers every specification available so you can make an informed decision.
Specification
BMW 8 Series840i xDrive Gran Coupe 2026 - From $94,500
Porsche 911Carrera Cabriolet 2026 - From $149,400
Performance
Power Output (hp)
335hp @ 5000
388hp @ 6500
Torque (lb-ft)
368lb-ft @ 1600
332lb-ft @ 1950
Engine & Drivetrain
Engine Capacity
3.0 L/183ci
3.0 L/182ci
Engine Layout
Inline
Flat/Boxer
Cylinders
6
6
Fuel Type
Gasoline
Gasoline
Forced Induction Device
Turbocharged
Turbocharged
Transmission
Automatic
Automatic
Number of Gears
8
8
Drive Wheels
All Wheel Drive
Rear Wheel Drive
Fuel Economy
Fuel Economy (Combined, est.)
25 mpg est.
22 mpg est.
Fuel Economy - City (mpg)
21mpg
18 (Est)mpg
Fuel Economy - Highway (mpg)
29mpg
25 (Est)mpg
Fuel Tank Capacity (gal)
18gal
16.6gal
Dimensions
Length (in)
200.2in
178.8in
Width (in)
76.1in
72.9in
Height (in)
55.2in
51.2in
Wheelbase (in)
119in
96.5in
Curb Weight (lbs)
4381lbs
3525lbs
Safety
ABS
✓ Standard
✓ Standard
Brake Assist
✓ Standard
✓ Standard
Stability Control
✓ Standard
✓ Standard
Traction Control
✓ Standard
✓ Standard
Driver Airbag
✓ Standard
✓ Standard
Passenger Airbag
✓ Standard
✓ Standard
Side Airbags Front
✓ Standard
✓ Standard
Curtain Airbags
✓ Standard
✓ Standard
Features & Tech
Air Conditioning
✓ Standard
✓ Standard
Climate Control
✓ Standard
✓ Standard
Cruise Control
✓ Standard
✓ Standard
Adaptive Cruise Control
✓ Standard
✓ Standard
Bluetooth
✓ Standard
✓ Standard
Backup Camera
✓ Standard
✓ Standard
Rear Parking Aid
✓ Standard
✓ Standard
Sunroof
✓ Standard
—
Heated Seats
✓ Standard
✓ Standard
Power Seat Adjustment
✓ Standard
✓ Standard
Keyless Entry
✓ Standard
✓ Standard
Alloy Wheels
✓ Standard
✓ Standard
The Verdict
Which Wins?
Overall Winner
BMW 8 Series
2 / 4 categories
Performance
911
Fuel Economy
8 Series
Value
8 Series
Practicality
Tied
Pros & Cons
BMW 8 Series
Better fuel economy (25 mpg est.)
Lower starting price ($94,500)
Few notable weaknesses
Porsche 911
Well-rounded specification
Higher fuel consumption (22 mpg est.)
Higher starting price
Frequently Asked Questions
Which is more fuel efficient, the 8 Series or 911?
The 8 Series gets 25 mpg est. and the 911 gets 22 mpg est. on the combined cycle. The 8 Series is the more fuel-efficient choice. In real-world conditions with a mix of highway and urban driving, actual figures will be slightly higher.
Which has more power, the 8 Series or 911?
The 8 Series produces 335hp @ 5000 and 368lb-ft @ 1600 of torque while the 911 delivers 388hp @ 6500 and 332lb-ft @ 1950 of torque. The 911 is the more powerful option.
What is the price difference between the 8 Series and 911?
The 8 Series starts from $94,500 and the 911 from $149,400. The 8 Series is cheaper by $54,900 at this variant level. Final on-the-road pricing varies by dealer and specification.
Should I buy the 8 Series or the 911?
It depends on your priorities. If fuel economy matters most, check the mpg figures above. If you need towing capacity, compare the towing ratings. For day-to-day driving - commutes, school runs and highway trips - consider ground clearance, service network coverage, and total cost of ownership including insurance and maintenance. Use the spec tables above to compare every detail before making your decision.
Also Consider