2018 Audi A8 Sedan

City mpg:
Highway mpg:

Actual rating will vary with options, driving conditions, habits and vehicle condition.

2018 Audi A8 Sedan Overview

The standard features of the Audi A8 L 3.0T include 3.0L V-6 333hp intercooled supercharger engine, 8-speed automatic transmission with overdrive, 4-wheel anti-lock brakes (ABS), integrated navigation system, side seat mounted airbags, SIDEGUARD curtain 1st and 2nd row overhead airbags, rear side-impact airbag, driver and passenger knee airbag, airbag occupancy sensor, automatic air conditioning, 19" aluminum wheels, cruise control, ABS and driveline traction control.

2018 Audi
A8 Sedan

Starting at: $82,500

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  • Air conditioning
  • Automatic temperature control
  • Front dual zone A/C
  • Residual heat recirculation
  • Rear air conditioning
  • Rear dual zone A/C
  • Power moonroof
  • Memory seat
  • Steering wheel memory
  • Head restraints memory
  • HVAC memory
  • Seatbelt memory
  • Speed control
  • Power windows
  • 1-touch down
  • 1-touch up
  • Remote keyless entry
  • Illuminated entry
  • Tilt steering wheel
  • Telescoping steering wheel
  • Auto tilt-away steering wheel
  • Auto-dimming rearview mirror
  • Driver vanity mirror
  • Passenger vanity mirror
  • Garage door transmitter - HomeLink
  • Navigation system
  • Front beverage holders
  • Rear beverage holders
  • Overhead console
  • Driver door bin
  • Passenger door bin
  • Rear door bins
  • Trunk/hatch auto-latch
  • AM/FM radio - SiriusXM
  • CD player
  • CD-MP3 decoder
  • DVD-Audio
  • Internal memory capacity (GB) - 20 GB
  • Radio data system
  • Steering wheel mounted audio controls
  • Speakers - 14
  • Speaker type - Bose
  • Wireless phone connectivity - Bluetooth
  • 1st row LCD monitors - 2
  • Primary LCD size - 8.0"
  • Diversity antenna
  • Basic warranty - 48 months/50,000miles
  • Powertrain warranty - 48 months/50,000miles
  • Corrosion perforation warranty - 144 months/ unlimited distance
  • Roadside assistance coverage - 48 months/ unlimited distance
  • Maintenance warranty - 12 months/10,000miles
  • Max seating capacity - 5
  • Front seats - bucket
  • Power driver seat
  • Power 4-way driver lumbar support
  • Power passenger seat
  • Power 4-way passenger lumbar support
  • Heated front seats
  • Rear seats - bench
  • Rear seat center armrest
  • Leather upholstery
  • Genuine wood console insert
  • Leather shift knob
  • Leather steering wheel
  • Engine displacement - 3.0 L
  • Engine horsepower - 333hp @ 5,500RPM
  • Engine torque - 325 lb.-ft. @ 2,900RPM
  • Engine bore x stroke - 84.5mm x 89.0mm (3.33" x 3.50")
  • Compression ratio - 10.30 to 1
  • Payload - 500kg (1,102lbs)
  • GVWR - 2,645kg (5,831lbs)
  • Exterior length - 5,268mm (207.4")
  • Exterior body width - 1,948mm (76.7")
  • Exterior height - 1,471mm (57.9")
  • Wheelbase - 3,122mm (122.9")
  • Turning radius - 6.4m (20.8')
  • Front legroom - 1,052mm (41.4")
  • Rear legroom - 1,090mm (42.9")
  • Front headroom - 945mm (37.2")
  • Rear headroom - 993mm (39.1")
  • Front shoulder room - 1,501mm (59.1")
  • Rear shoulder room - 1,468mm (57.8")
  • Passenger volume - 3,452L (121.9 cu.ft.)
  • Interior cargo volume - 402 L (14 cu.ft.)
  • Interior maximum cargo volume - 402 L (14 cu.ft.)
  • Rear cargo - power open and close trunk
  • Door auto-latch
  • Power door mirrors
  • Heated door mirrors
  • Auto-dimming door mirrors
  • Turn signal indicator mirrors
  • Tailpipe finisher - polished
  • Door mirrors - body-color
  • Bumpers - body-color
  • Engine liters - 3.0
  • Compressor - intercooled supercharger
  • Cylinder configuration - V-6
  • Horsepower - 333hp @ 5,500RPM
  • Torque - 325 lb.-ft. @ 2,900RPM
  • Number of valves - 24
  • Variable valve control
  • Variable intake manifold
  • Engine location - front
  • Recommended fuel - Premium Unleaded
  • Transmission - 8 speed automatic
  • Mode select transmission
  • Manual-shift auto
  • Drive type - quattro all-wheel drive
  • Fuel economy combined - 22mpg
  • Fuel tank capacity - 21.7gal.
  • Fuel economy city - 19mpg
  • Fuel economy highway - 29mpg
  • 4 wheel disc brakes
  • ABS brakes
  • Brake assist
  • Dual front impact airbags
  • Dual front side impact airbags
  • Overhead airbag
  • Knee airbag
  • Rear side impact airbag
  • Occupant sensing airbag
  • Panic alarm
  • Perimeter/approach lights
  • Ignition disable
  • Security system
  • Electronic stability
  • Traction control
  • Power adjustable front head restraints
  • Adjustable head restraints - driver and passenger, rear w/tilt
  • Adaptive suspension
  • Auto-leveling suspension
  • Four wheel independent suspension
  • Front anti-roll bar
  • Rear anti-roll bar
  • Power steering
  • Alloy wheels
  • Front tires - 255/45HR19.0
  • Rear tires - 255/45HR19.0
  • Wheel size - 19"
  • Delay-off headlights
  • Headlight cleaning
  • Front fog lights
  • Rear fog lights
  • Variably intermittent wipers
  • Rain sensing wipers
  • Speed sensitive wipers
  • Rear window defroster
  • Rear window blind
  • Sun blinds
  • Front reading lights
  • Rear reading lights
  • Display - analog
  • Tachometer
  • Compass
  • Outside temperature display
  • Low tire pressure warning
  • Trip computer
  • Parking sensors - front and rear
  • Forward collision - Audi pre sense basic warning
  • Exterior parking camera rear


  MSRP Engine Transmission City/Hwy mpg
L 3.0T 2018 Audi A8 Sedan L 3.0T Search New $82,500   333-hp 3.0L 6-cyl  8-spd auto  19 / 29  
L 4.0T Sport 2018 Audi A8 Sedan L 4.0T Sport Search New $92,000   450-hp 4.0L 8-cyl  8-spd auto  16 / 26  


Driving Impression

New Car Test Drive

When you read the term lightweight aluminum chassis, it only means that aluminum weighs less than steel. It doesn’t mean that the car is light. The A8 might be your best example (among very few), it comes out pretty porky, at 4670 pounds fully equipped.

But the chassis and suspension engineers scored an ace, in making the A8 feel as light and nimble as a full-size car can feel. It’s a complex suspension, which the Quattro system understands, to make the A8 feel sure-footed in corners. The front-to-rear torque split varies from 40/60 front/rear, to 60/40 front/rear.

The supercharged 3.0-liter V6 engine is very responsive and has fabulous torque down low. It’s not especially smooth, and can be noisy when the throttle is way down. Acceleration to 60 mph takes 5.5 seconds.

The gearshifts in the 8-speed automatic are smooth, quick, well-spaced, and well-programmed, which is to say they come at the right times, so no invasive surges. In manual mode, the paddleshifters can be used.

The 4.0-liter twin-turbocharged V8, with 450 horsepower, is basically the same engine as in the S8, with 605 horsepower. The difference is all in plumbing, breathing, and electronics. One thing that means is that the structure of the 4.0-liter engine is strong, strong enough to handle 30 percent more power without breaking.

Drive Select can control the response of the engine, transmission, steering, and suspension. Comfort, Auto, or Dynamic mode can move the car from sedate to dramatic. In Comfort or Auto mode, the transmission tends to shift quite early, and it downshifts a lot.

There’s also an Individual mode, so an owner can find the overall setting for how he or she likes the car to feel. There’s a lot of tweaking and awareness, to find that place. It’s not unlike adjusting an 18-way power seat, it takes some experimenting and moving around.

The S8 isn’t a hotrod, not even with 605 horsepower and 517 pound-feet of torque. It’s too smooth to be a hotrod. t. It’s an executive uber-car. The ultimate full-size luxury car, with the ultimate motor. It’s breathtaking in its power, and execution. With an 8-speed automatic, Quattro, adaptive dampers and air suspension, it’s got it all.

Walk Around

New Car Test Drive

The A8 is stylish, nothing flashy, not even excessive. It’s sophisticated, restrained and low key. It’s way less sleek and dramatic than the Audi A7 sedan.

It’s well detailed. Front LED lighting highlights the expansive elegance of the hood and shoulders. What used to be the Sport package of exterior tweaks is now standard, making it officially in our book a sport sedan. Never mind that the gearshift lever is patterned after the throttle of a yacht.

The S8 is the ultimate sleeper, hiding its 605 horsepower under a hood and body that’s no different than the A8 sedan, except four inches shorter, although it looks longer because it’s lower. The subtle spoiler on the deck lid is the only cue.

Interior Overview

New Car Test Drive

If the A8 exterior is well detailed, the cabin is extremely well detailed, with the best materials, whether it’s leather, wood, aluminum, plastic, or splashes of chrome. It’s plush and comfortable. The standard front seats adjust 18 ways, upholstered in perforated leather, and comfortable; it feels like two cushions, soft on top of a firmer one. At startup, tweeters rise from the dashboard, to name one cool detail.

Two adults have plenty of room in the rear, comforted by individual climate control. An option includes a footrest for the right side and recline/massage for the left. The dual panel sunroof doesn’t steal head space. Trunk space is 13.2 cubic feet, slim for a full-size car. The S8, with its shorter wheelbase, has a smaller trunk.

Audi engineering keeps away almost all wind and road noise. The A8 is silent and serene.

The standard infotainment system is impressive, using Audi’s Multi-Media Interface, a knob on the console that spins and clicks, to scroll and select audio, phone, climate, and navigation.

There are a couple flaws to the infotainment system. Some controls are duplicated needlessly, and voice control has a mind and voice of its own. It doesn’t always respond properly to commands. Good luck if you can find one of those in life.


New Car Test Drive

We like the excitement of the base engine, the supercharged 3.0-liter V6. Any A8 is well detailed, quiet, comfortable, and roomy–near the top of each category, compared to rivals the full-size luxury segment. The Quattro and 8-speed automatic flawlessly add to the dynamics. The S8 is a Master of the Universe kind of car.

Sam Moses contributed to this review, with staff reports.

Model Lineup

New Car Test Drive

A8 L 3.0T ($82,500) has the supercharged V6 engine, Quattro all-wheel drive, leather upholstery, navigation, full-LED headlights, power front and rear seats, a sunroof, and power-closing trunk lid. Standard infotainment boasts satellite radio, Bluetooth phone and streaming, Bose speakers, and a USB port. Curiously, a rearview camera is optional, though parking sensors are standard.

A8 L 4.0T ($92,000) features the twin-turbo 450-horsepower, 4.0-liter V8.

S8 ($115,900) uses the shorter wheelbase and comes with a 605-horsepower V8. (Prices are MSRP and do not include destination charge.)

Numerous safety features include front knee and rear-side passenger airbags. Audi’s Pre Sense system can tighten seatbelts before an impact occurs. Advanced safety technologies come in option groups, including adaptive cruise control with stop/go capability in traffic, blind-spot monitoring, lane-keeping assist, and Night Vision.

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