| Model Year | 2018 | 2018 |
| Model | A8 / S8 | Model X |
| Trim | A8 L 4.0T Sport | P100D |
| Body | 4dr Sedan, ext. | 4dr SUV |
| | |
| Transmission and Drivetrain | |
| 8-speed manually-shiftable automatic | $1300 | |
| 1-speed automatic | | $800 |
| AWD | $1700 | $1700 |
| Accessories | |
| Active noise reduction | $0 | |
| Adaptive cruise control, all-speed | $850 | |
| Adaptive cruise control, all-speed, road sign aware | | $1000 |
| Automated lane change | | $300 |
| Automated parking system, remote | | $200 |
| Power charge port door | | $25 |
| Power door closers | $300 | |
| Power front doors with proximity sensors | | $500 |
| Power gullwing doors | | $1200 |
| Power liftgate | | $350 |
| Power trunk closer | $350 | |
| Remote app | | $25 |
| Remote window/roof operation | $15 | |
| Semi-automated parking system | | $500 |
| Semi-autonomous driving | | $600 |
| Sunshade, rear, power | $225 | |
| Sunshades, second row, power | $225 | |
| Brakes, Airbags, and Other Safety | |
| Active or whiplash-reducing head restraints, front seats | $0 | |
| Around view cameras | $500 | |
| Automatic braking, high-speed or partial | | $200 |
| Automatic braking, low-speed | $200 | |
| Blind spot warning system | $200 | |
| Brake assist | $50 | |
| Collision preparation system, rear | $100 | |
| Full-size spare tire | $225 | |
| Lane departure prevention, steering-based | $200 | |
| Radar- or camera-based collision preparation system | $0 | |
| Rearview camera | | $200 |
| Trailer sway control | | $25 |
| Wide-view front camera | $150 | |
| Wide-view rear camera | $0 | |
| Cargo Management | |
| Air-conditioned storage compartment | $50 | |
| Cargo net | $40 | |
| Class III trailer hitch | | $250 |
| Console with shifter | $150 | |
| Console without shifter | | $150 |
| Rear seat pass-through | $100 | |
| Ski sack | $50 | |
| Trailering equipment (7 wire) | | $150 |
| Climate Control | |
| Automatic air recirculation | $100 | |
| Heated windshield washer nozzles | $15 | |
| HEPA interior air filter | | $100 |
| Interior air filter | $0 | |
| Rear air vents | | $100 |
| Rear air vents with automatic controls | $250 | |
| Rear dual-zone climate control | $125 | |
| Residual heat | $50 | |
| Wiper de-icer | | $25 |
| Engine / Motor | |
| 10 kW onboard charger | | $750 |
| 100 kWh battery pack | | $0 |
| 400 kWh a year of DC charging credits | | $200 |
| Automatic start / stop | $150 | |
| DC quick-charging capability | | $750 |
| High amperage charger | | $750 |
| Exterior | |
| Bodyside cladding (gray/black) | | $250 |
| Bright-finished exhaust tip(s) | $25 | |
| Glass roof panel(s) | | $300 |
| Laminated front side windows | $200 | |
| Laminated rear side windows | $100 | |
| Painted brake calipers (optional) | | $0 |
| Panoramic sunroof with venting rear panel | $1500 | |
| Panoramic windshield | | $600 |
| Retractable rear spoiler | | $400 |
| Wheel-lip moldings | | $75 |
| Infotainment | |
| 4G LTE connectivity | | $0 |
| App support | | $0 |
| Aux input | $50 | |
| CD player | $125 | |
| Center stack smartphone cradle | | $0 |
| DVD-compatible player | $0 | |
| Handwriting recognition | $200 | |
| Media drive | $15 | |
| MP3-compatible player | $50 | |
| Range alert | | $0 |
| SD Card slot | $25 | |
| Traffic + travel information | $25 | |
| Wi-Fi hotspot | $50 | |
| Instruments, Lights, and Mirrors | |
| Analog clock | $25 | |
| Compass | $0 | |
| Fog light, rear | $100 | |
| Fog lights | | $125 |
| Head-up display (HUD) | $350 | |
| Headlight washers | $50 | |
| Illuminated vanity mirrors, rear seat | $100 | |
| Interior ambient lighting | | $150 |
| Interior ambient lighting, configurable | $150 | |
| Large color reconfigurable instrument cluster display | | $250 |
| Large energy flow and fuel economy display | | $25 |
| Tachometer | $75 | |
| Seats and Interior Trim | |
| Center armrest(s), second row | $50 | |
| Cooled or ventilated front seats | $300 | |
| Cooled or ventilated second row seats | $200 | |
| Door sill trim plates | $100 | |
| Leather door panel trim | $250 | |
| Leather seating surfaces | $900 | |
| Massage, driver seat | $100 | |
| Massage, passenger seat | $100 | |
| Massage, second row seats | $150 | |
| Memory system, second row seats | $150 | |
| Metal pedals | | $75 |
| Power 4-way lumbar adjuster, second row seats | $225 | |
| Power fore-aft adjuster, second row seats | | $150 |
| Power seat belt height adjusters, front row | $25 | |
| Power seatback bolsters, driver seat | $100 | |
| Power seatback bolsters, passenger seat | $100 | |
| Power thigh bolsters, driver seat | $100 | |
| Power thigh bolsters, passenger seat | $100 | |
| Power thigh support length adjuster, driver seat | $100 | |
| Power thigh support length adjuster, passenger seat | $100 | |
| Power upper seatback recliner, driver seat | $100 | |
| Power upper seatback recliner, passenger seat | $100 | |
| Synthetic leather seating surfaces | | $0 |
| Suspension, Wheels, and Tires | |
| Adaptive dampers - electrical | $500 | |
| Transmission | |
| Steering-wheel-mounted transmission controls | $100 | |
| Total Value of Features | $14,835 | $13,250 |
| Value of Feature Adjustments | $1,585 | $0 |
| Value of Feature Adjustments | -1,475 | 0 |