Audi A6 / S6 Audi A6 / S6 2018 Cadillac CT6 Cadillac CT6 2018

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Audi A6 / S6 vs. Cadillac CT6 Price Comparison (MSRP)

The sticker prices, before adjusting for remaining feature differences. Usually these are the numbers you will see on the window stickers.

Models in short supply often sell at or even above these prices.

Audi A6 / S6 vs. Cadillac CT6 Invoice Comparison

Lowest Total Price: $85,990

Audi A6 / S6 S6 4.0 TFSI   
Difference: $3,510

Lowest Total Invoice: $80,048

Audi A6 / S6 S6 4.0 TFSI   
Difference: $5,014

Calculate Payments

  Down Payment Interest Rate Term
Model Year20182018
ModelA6 / S6CT6
TrimS6 4.0 TFSIPlatinum
Body4dr Sedan4dr Sedan
Base Price $71,900 $84,295
Base Invoice $66,868 $80,080
Prestige Package 2,500  
Cold Weather Package 500  
Comfort Seating Package 1,850  
Driver Assistance Package 2,000  
Metallic paint (extra cost) 575  
Cargo mat 190 150
Night vision 2,500  
Synthetic suede headliner 3,000  
Cargo net   60
3.0L V6   4,000
Prestige Package 2,326  
Cold Weather Package 467  
Comfort Seating Package 1,722  
Driver Assistance Package 1,860  
Metallic paint (extra cost) 536  
Cargo mat 178 134
Night vision 2,326  
Synthetic suede headliner 2,790  
Cargo net   53
3.0L V6   3,800
Options (change) 13,115 4,210
Options (change) 12,205 3,987
Destination 975 995
Total Price $85,990 $89,500
Total Invoice $80,048 $85,062

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While we strive for accuracy, the site is not error-free, and prices can change at any time.

Dealer Price Quotes

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TrueDelta Value Comparison: Audi A6 / S6 vs. Cadillac CT6

Lowest Adjusted Price: Cadillac CT6 Platinum
Lowest Adjusted Invoice: Audi A6 / S6 S6 4.0 TFSI
TrueDelta Adjusted Price Difference: $1,695
TrueDelta Adjusted Invoice Difference: $67
Model Year20182018
ModelA6 / S6CT6
TrimS6 4.0 TFSIPlatinum
Body4dr Sedan4dr Sedan
Engine450hp V8404hp V6
TransmissionS7T8
DrivetrainAWDAWD
EPA Fuel Economy (city/highway)16/24 MPG18/26 MPG
Audio (watts, speakers)630, 14?, 34
Tire (rear if not all the same)255/35-20245/40-20
Total Price$85,990$89,500
Adjustments for Features0-5,205
Feature-Adjusted Total Price$85,990$84,295
Total Invoice$80,048$85,062
Adjustments for Features0-4,947
Feature-Adjusted Total Invoice$80,048$80,115

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Features Comparison: Audi A6 / S6 vs. Cadillac CT6

Model Year20182018
ModelA6 / S6CT6
TrimS6 4.0 TFSIPlatinum
Body4dr Sedan4dr Sedan
Transmission and Drivetrain 
7-speed automated manual$1200 
8-speed manually-shiftable automatic $1300
AWD$1700$1700
Accessories 
AC power outlet $100
Active noise reduction $0
Electronic engine sound enhancement $0
Remote app $25
Remote start $150
Semi-automated parking system $500
Sunshade, rear, power$225 
Brakes, Airbags, and Other Safety 
Automatic braking, high-speed or partial $200
Backup collision intervention $150
Collision preparation system, rear$100 
Cross-traffic warning, rear $100
Following distance indicator $25
Hands-free driving on limited-access highways $1000
Lane departure prevention, steering-based$200 
Lane keeping assist $400
Pedestrian detection $50
Pedestrian detection, night$50 
Rollover sensor$50 
Safety key $5
Secondary collision brake assist$25 
Surround view video recorder $50
Vehicle health reports $0
Wide-view front camera$150 
Wide-view rear camera$0 
Climate Control 
Automatic air recirculation$100 
Heated windshield washer nozzles$15 
Ionizing air filtration $50
Residual heat$50 
Engine / Motor 
Dual-mode exhaust, switchable$500 
Regenerative braking$0 
Exterior 
Active grille shutters $0
Panoramic sunroof $1200
Sunroof$900 
Infotainment 
App support $0
CD player$125 
DVD-compatible player$0 
Entertainment system with dual headrest screens $1200
Handwriting recognition$200 
HDMI port $25
In-vehicle Internet$150 
Media drive$15 
MP3-compatible player$50 
SD Card slot$25 
SMS text-to-speech reader $25
Streaming video device $30
Streaming video support $25
Telematics service, such as OnStar, with navigation $225
Traffic + travel information$25 
Traffic information $25
Voice control for external devices $0
Wireless charging station $75
Instruments, Lights, and Mirrors 
Approach detection $25
Auto-dimming passenger-side mirror$75 
Compass$0 
Cornering lights $50
Fog light, rear$100 
Large color reconfigurable instrument cluster display $250
Mirror tilt-down in reverse$25 
Rear camera mirror $200
Seats and Interior Trim 
Cooled or ventilated second row seats $200
Folding second row seats$300 
Massage, second row seats $150
Metal pedals$75 
Power 4-way lumbar adjuster, second row seats $225
Power recliner, second row seats $150
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 tilt adjuster, second row seats $150
Power upper seatback recliner, driver seat $100
Power upper seatback recliner, passenger seat $100
Upholstered instrument panel, leather $1000
Suspension, Wheels, and Tires 
Adaptive dampers - electrical $500
Air suspension, auto-leveling and height adjustable$1000 
Electronic systems calibration selector$200 
Rear wheel steering $1500
Sport suspension (upgrade)$0 
Total Value of Features$8,030$13,235
Value of Feature Adjustments$0$5,205
Value of Feature Adjustments0-4,947

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Specifications Comparison: Audi A6 / S6 vs. Cadillac CT6

Model Year20182018
ModelA6 / S6CT6
Body4dr Sedan4dr Sedan
Wheelbase114.6 in122.4 in
Length194.2 in204.0 in
Width73.8 in74.0 in
Height57.8 in57.9 in
Curb Weight4,398 lb.4,085 lb.
Fuel Capacity19.8 gal.19.5 gal.
Row 1 Headroom37.2 in40.1 in
Row 1 Shoulder Room57.5 in58.3 in
Row 1 Hip Room0.0 in55.8 in
Row 1 Legroom41.3 in42.3 in
Row 2 Headroom37.8 in38.0 in
Row 2 Shoulder Room56.3 in56.1 in
Row 2 Hip Room0.0 in53.4 in
Row 2 Legroom37.4 in40.4 in
Cargo Volume14.1 ft315.3 ft3

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Option Package Details
Audi A6 / S6 S6 4.0 TFSI

Prestige Package
FeatureValueRequested?
Sunshades, second row125Yes
Sunshade, rear, power225No
Power trunk closer350Yes
Head-up display (HUD)350Yes
Around view cameras300Yes
Wide-view front camera150No
Hands-free trunk or liftgate100Yes
Wide-view rear camera0No
Total Requested122577%
Total Not Requested37523%
Cold Weather Package
FeatureValueRequested?
Heated second row seats200Yes
Heated steering wheel100Yes
Total Requested300100%
Total Not Requested00%
Comfort Seating Package
FeatureValueRequested?
Cooled or ventilated front seats300Yes
Power thigh support length adjuster, driver seat100Yes
Power thigh bolsters, driver seat100No
Power seatback bolsters, driver seat100No
Power thigh support length adjuster, passenger seat100Yes
Power thigh bolsters, passenger seat100No
Power seatback bolsters, passenger seat100No
Memory system, passenger seat150Yes
Massage, driver seat100Yes
Massage, passenger seat100Yes
Total Requested85068%
Total Not Requested40032%
Driver Assistance Package
FeatureValueRequested?
Auto-dimming headlights200Yes
Radar- or camera-based collision preparation system0Yes
Lane departure warning200Yes
Adaptive cruise control, all-speed700Yes
Automatic braking, low-speed200Yes
Forward collision warning200Yes
Lane departure prevention, steering-based200Yes
Total Requested1700100%
Total Not Requested00%

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