VS
At a Glance
Power
362hp
523hp @ 5500
Torque
406lb-ft
553lb-ft @ 1800
Fuel
24 mpg est.
20 mpg est.
Engine
3.0 L/183ci
4.4 L/268ci
Choosing between the Audi S5 and the BMW 8 Series is one of the most common decisions car buyers in the United States face. The Audi S5 delivers 362hp while the BMW 8 Series produces 523hp @ 5500. On fuel, the S5 returns 24 mpg est. while the 8 Series uses 20 mpg est. — important in a market where fuel prices change monthly. Pricing starts at $70,900 for the S5 and $94,500 for the 8 Series. 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
Audi S5Prestige 3.0 TFSI quattro 2026 - From $70,900
BMW 8 SeriesM850i xDrive Coupe 2026 - From $94,500
Performance
Power Output (hp)
362hp
523hp @ 5500
Torque (lb-ft)
406lb-ft
553lb-ft @ 1800
Engine & Drivetrain
Engine Capacity
3.0 L/183ci
4.4 L/268ci
Engine Layout
V
—
Cylinders
6
8
Fuel Type
Gasoline
Gasoline
Forced Induction Device
Turbocharged
Turbocharged
Transmission
Automatic
Automatic
Number of Gears
7
8
Drive Wheels
All Wheel Drive
All Wheel Drive
Fuel Economy
Fuel Economy (Combined, est.)
24 mpg est.
20 mpg est.
Fuel Economy - City (mpg)
19 (2025)mpg
17mpg
Fuel Economy - Highway (mpg)
28 (2025)mpg
24mpg
Fuel Tank Capacity (gal)
14.8gal
18gal
Dimensions
Length (in)
190.3in
191.2in
Width (in)
73.2in
74.9in
Height (in)
56.5in
53in
Wheelbase (in)
114in
111.1in
Curb Weight (lbs)
4288lbs
4478lbs
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
Audi S5
2 / 4 categories
Performance
8 Series
Fuel Economy
S5
Value
S5
Practicality
Tied
Pros & Cons
Audi S5
Better fuel economy (24 mpg est.)
Lower starting price ($70,900)
Few notable weaknesses
BMW 8 Series
Well-rounded specification
Higher fuel consumption (20 mpg est.)
Higher starting price
Frequently Asked Questions
Which is more fuel efficient, the S5 or 8 Series?
The S5 gets 24 mpg est. and the 8 Series gets 20 mpg est. on the combined cycle. The S5 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 S5 or 8 Series?
The S5 produces 362hp and 406lb-ft of torque while the 8 Series delivers 523hp @ 5500 and 553lb-ft @ 1800 of torque. The 8 Series is the more powerful option.
What is the price difference between the S5 and 8 Series?
The S5 starts from $70,900 and the 8 Series from $94,500. The S5 is cheaper by $23,600 at this variant level. Final on-the-road pricing varies by dealer and specification.
Should I buy the S5 or the 8 Series?
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