VS
At a Glance
Power
523hp @ 5500
396hp
Torque
553lb-ft @ 1800
443lb-ft
Fuel
20 mpg est.
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Engine
4.4 L/268ci
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Choosing between the BMW 8 Series and the BMW I4 is one of the most common decisions car buyers in the United States face. The BMW 8 Series delivers 523hp @ 5500 while the BMW I4 produces 396hp. Pricing starts at $94,500 for the 8 Series and $62,300 for the I4. 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 SeriesM850i xDrive Coupe 2026 - From $94,500
BMW I4xDrive40 Gran Coupe 2026 - From $62,300
Performance
Power Output (hp)
523hp @ 5500
396hp
Torque (lb-ft)
553lb-ft @ 1800
443lb-ft
Engine & Drivetrain
Engine Capacity
4.4 L/268ci
—
Cylinders
8
—
Fuel Type
Gasoline
Electric
Forced Induction Device
Turbocharged
—
Transmission
Automatic
Automatic
Number of Gears
8
1
Drive Wheels
All Wheel Drive
All Wheel Drive
Fuel Economy
Fuel Economy (Combined, est.)
20 mpg est.
—
Fuel Economy - City (mpg)
17mpg
—
Fuel Economy - Highway (mpg)
24mpg
—
Fuel Tank Capacity (gal)
18gal
—
Dimensions
Length (in)
191.2in
188.5in
Width (in)
74.9in
72.9in
Height (in)
53in
57in
Wheelbase (in)
111.1in
112.4in
Curb Weight (lbs)
4478lbs
4969lbs
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
Tie
1 / 4 categories
Performance
8 Series
Fuel Economy
Tied
Value
I4
Practicality
Tied
Pros & Cons
BMW 8 Series
Well-rounded specification
Higher starting price
BMW I4
Lower starting price ($62,300)
Few notable weaknesses
Frequently Asked Questions
Which has more power, the 8 Series or I4?
The 8 Series produces 523hp @ 5500 and 553lb-ft @ 1800 of torque while the I4 delivers 396hp and 443lb-ft of torque. The 8 Series is the more powerful option.
What is the price difference between the 8 Series and I4?
The 8 Series starts from $94,500 and the I4 from $62,300. The I4 is cheaper by $32,200 at this variant level. Final on-the-road pricing varies by dealer and specification.
Should I buy the 8 Series or the I4?
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