Porsche Boxster Porsche Boxster 2008 Audi A4 / S4 Audi A4 / S4 2006

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Porsche Boxster vs. Audi A4 / S4 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.

Porsche Boxster vs. Audi A4 / S4 Invoice Comparison

Lowest Total Price: $61,985

Audi A4 / S4 S4 Cabriolet   
Difference: $11,000

Lowest Total Invoice: $57,160

Audi A4 / S4 S4 Cabriolet   
Difference: $1,179

Calculate Payments

  Down Payment Interest Rate Term
Model Year20082006
ModelBoxsterA4 / S4
TrimSS4 Cabriolet
Body2dr Convertible2dr Convertible
Base Price $55,700 $54,640
Base Invoice $43,512 $50,256
Xenon HID headlights 1,090  
Adaptive Sports Seats 3,055  
Auto-dimming rearview mirror 690  
Metallic paint (extra cost) 690 450
Wood trim 890  
Floor mats 115  
Automatic climate control, front 550  
Obstacle detection, rear 530 350
Navigation system 3,110 1,950
Audio controls on steering wheel 990 150
Heated front seats 480  
Wind blocker, small 375  
5-speed shiftable automatic 3,210  
CD changer, remote 650  
Premium Package   1,775
Tire-pressure monitor   250
Xenon HID headlights 927  
Adaptive Sports Seats 2,597  
Auto-dimming rearview mirror 587  
Metallic paint (extra cost) 587 410
Wood trim 757  
Floor mats 98  
Automatic climate control, front 468  
Obstacle detection, rear 451 319
Navigation system 2,644 1,775
Audio controls on steering wheel 842 137
Heated front seats 408  
Wind blocker, small 319  
5-speed shiftable automatic 2,729  
CD changer, remote 553  
Premium Package   1,615
Tire-pressure monitor   228
Options (change) 16,425 4,925
Options (change) 13,967 4,484
Destination 860 720
Gas Tax 0 1,700
Total Price $72,985 $61,985
Total Invoice $58,339 $57,160

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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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Request free, no-obligation Porsche Boxster dealer quotes or Audi A4 / S4 dealer quotes from dealers using our car quote form.

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TrueDelta Value Comparison: Porsche Boxster vs. Audi A4 / S4

Lowest Adjusted Price and Invoice: Audi A4 / S4 S4 Cabriolet
TrueDelta Adjusted Price Difference: $12,470
TrueDelta Adjusted Invoice Difference: $2,535
Model Year20082006
ModelBoxsterA4 / S4
TrimSS4 Cabriolet
Body2dr Convertible2dr Convertible
Engine295hp H6340hp V8
TransmissionT5M6
DrivetrainRWDAWD
EPA Fuel Economy (city/highway)18/25 MPG15/21 MPG
Audio (watts, speakers)230, 7180, 9
Tire (rear if not all the same)235/40-18235/40-18
Total Price$72,985$61,985
Adjustments for Features0-1,470
Feature-Adjusted Total Price$72,985$60,515
Total Invoice$58,339$57,160
Adjustments for Features0-1,356
Feature-Adjusted Total Invoice$58,339$55,804

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Features Comparison: Porsche Boxster vs. Audi A4 / S4

Model Year20082006
ModelBoxsterA4 / S4
TrimSS4 Cabriolet
Body2dr Convertible2dr Convertible
Transmission and Drivetrain 
5-speed manually-shiftable automatic$1000 
6-speed manual $150
RWD$0 
AWD $1700
Accessories 
Power rear side windows $200
Wind blocker $300
Wind blocker, small$100 
Brakes, Airbags, and Other Safety 
Auto-raising roll bars / headrests $500
Brake assist $50
Knee airbag, driver $75
Knee airbag, passenger $75
Roll bar$200 
Cargo Management 
Cargo net$40 
Rear seat pass-through $100
Ski sack $50
Climate Control 
Dual-zone climate control $125
Rain-sensing wipers$175 
Variable intermittent wipers $75
Water-repellent front-door glass$15 
Engine / Motor 
Mid-engine configuration$0 
Exterior 
Bodyside moldings $75
Retractable rear spoiler$400 
Infotainment 
CD player$125 
Instruments, Lights, and Mirrors 
Automatic headlights $125
Compass $0
Power-folding mirrors $50
Turn signals on or near mirrors $25
Seats and Interior Trim 
Center armrest(s), second row $50
Manual thigh support length adjuster, driver seat $50
Power 4-way lumbar adjuster, passenger seat $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 
Suspension, Wheels, and Tires 
Ultra-sport suspension (upgrade) $0
Total Value of Features$2,455$3,925
Value of Feature Adjustments$0$1,470
Value of Feature Adjustments0-1,356

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Specifications Comparison: Porsche Boxster vs. Audi A4 / S4

Model Year20082006
ModelBoxsterA4 / S4
Body2dr Convertible2dr Convertible
Wheelbase95.1 in104.5 in
Length170.4 in180.0 in
Width70.9 in70.0 in
Height51.0 in54.8 in
Curb Weight3,053 lb.3,958 lb.
Fuel Capacity17.0 gal.16.6 gal.
Row 1 Headroom38.4 in38.0 in
Row 1 Shoulder Room51.7 in53.0 in
Row 1 Hip Room53.4 in0.0 in
Row 1 Legroom41.6 in41.3 in
Row 2 Headroom0.0 in36.3 in
Row 2 Shoulder Room0.0 in45.1 in
Row 2 Legroom0.0 in32.4 in
Cargo Volume9.9 ft38.9 ft3

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Option Package Details
Porsche Boxster S

Adaptive Sports Seats
FeatureValueRequested?
Power thigh bolsters, driver seat100No
Power seatback bolsters, driver100No
Power thigh bolsters, passenger seat100No
Power seatback bolsters, passenger seat100No
Front sport buckets100Yes
Power fore-aft adjuster, driver seat100Yes
Power height adjuster, driver seat50Yes
Power tilt adjuster, driver seat100Yes
Power 4-way lumbar adjuster, driver seat150Yes
Power fore-aft adjuster, passenger seat100Yes
Memory system, driver seat200Yes
Power height adjuster, passenger seat50Yes
Power tilt adjuster, passenger seat100Yes
Total Requested95070%
Total Not Requested40030%

Option Package Details
Audi A4 / S4 S4 Cabriolet

Navigation system
FeatureValueRequested?
Navigation system600Yes
CD changer, remote-125Yes
Total Requested475100%
Total Not Requested00%
Premium Package
FeatureValueRequested?
Heated front seats200Yes
Universal garage door opener100Yes
Automatic headlights125No
Alloy wheels, optional design0No
Memory system, driver seat200Yes
Wind blocker300No
Auto-dimming rearview mirror150Yes
Auto-dimming driver-side mirror75Yes
Compass0No
Power-folding mirrors50No
Auto-dimming passenger-side mirror75Yes
Total Requested80063%
Total Not Requested47537%

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