Mazda RX-8 Mazda RX-8 2006 Kia Optima Kia Optima 2016

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Mazda RX-8 vs. Kia Optima 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.

Mazda RX-8 vs. Kia Optima Invoice Comparison

Lowest Total Price: $31,190

Kia Optima SX   
Difference: $4,420

Lowest Total Invoice: $29,048

Kia Optima SX   
Difference: $3,351

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  Down Payment Interest Rate Term
Model Year200620162016
ModelRX-8OptimaOptima
TrimBase (manual)SXSX Limited
Body4dr Coupe4dr Sedan4dr Sedan
Base Price $26,435 $29,940 $36,040
Base Invoice $24,458 $27,865 $33,435
Shinka Package 6,165    
Rear spoiler 360    
Cargo mat 50    
Navigation system 2,000    
Cargo net 40 50 50
Universal garage door opener   350 350
Shinka Package 5,304    
Rear spoiler 288    
Cargo mat 36    
Navigation system 1,721    
Cargo net 32 42 42
Universal garage door opener   291 291
Options (change) 8,615 400 400
Options (change) 7,381 333 333
Destination 560 850 850
Total Price $35,610 $31,190 $37,290
Total Invoice $32,399 $29,048 $34,618

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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 Mazda RX-8 dealer quotes or Kia Optima dealer quotes from dealers using our car quote form.

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TrueDelta Value Comparison: Mazda RX-8 vs. Kia Optima

Lowest Adjusted Price and Invoice: Kia Optima SX
TrueDelta Adjusted Price Difference: $6,830
TrueDelta Adjusted Invoice Difference: $5,595
Model Year200620162016
ModelRX-8OptimaOptima
TrimBase (manual)SXSX Limited
Body4dr Coupe4dr Sedan4dr Sedan
Engine238hp R2245hp I4245hp I4
TransmissionM6T6T6
DrivetrainRWDFWDFWD
EPA Fuel Economy (city/highway)18/24 MPG22/32 MPG22/32 MPG
Audio (watts, speakers)300, 9?, 6630, 10
Tire (rear if not all the same)225/45-18235/45-18235/45-18
Total Price$35,610$31,190$37,290
Adjustments for Features0-2,410-7,360
Feature-Adjusted Total Price$35,610$28,780$29,930
Cost Above Minimum$0$0$1,150
Total Invoice$32,399$29,048$34,618
Adjustments for Features0-2,244-6,833
Feature-Adjusted Total Invoice$32,399$26,804$27,785
Cost Above Minimum$0$0$981

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Features Comparison: Mazda RX-8 vs. Kia Optima

Model Year200620162016
ModelRX-8OptimaOptima
TrimBase (manual)SXSX Limited
Body4dr Coupe4dr Sedan4dr Sedan
Transmission and Drivetrain 
6-speed manual$150  
6-speed manually-shiftable automatic $1100$1100
RWD$0  
FWD $0$0
Accessories 
Adaptive cruise control, all-speed  $850
Cruise control$150$150 
Heated steering wheel $100$100
Power rear side windows $200$200
Proximity trunk or liftgate opener $125$125
Sunshades, second row $125$125
Tilt steering wheel, manual$150  
Tilt/telescoping steering wheel, manual $250$250
Brakes, Airbags, and Other Safety 
911 assist $25$25
Active or whiplash-reducing head restraints, front seats $0$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$50
Cross-traffic warning, rear  $100
Forward collision warning  $200
Knee airbag, driver $75$75
Lane departure warning  $200
Obstacle detection, rear  $250
Rearview camera $200 
Rollover sensor $50$50
Vehicle health reports $0$0
Cargo Management 
Rear seat pass-through$100  
Second-row high console$250  
Climate Control 
Automatic climate control, front $200$200
Dual-zone climate control $125$125
Rear air vents $100$100
Water-repellent front-door glass$15  
Drivetrain 
Limited-slip rear differential$300  
Exterior 
Laminated front side windows $200$200
Painted brake calipers (optional) $0$0
Panoramic sunroof  $1200
Sunroof$900  
Infotainment 
Android Auto support $100$100
App support $0$0
Aux input $50$50
Bluetooth audio streaming $25$25
Bluetooth cell phone link $100$100
CD changer, in-dash$325  
HD radio $50$50
SMS text-to-speech reader $25$25
Surround sound  $250
Traffic information $25$25
Voice control for external devices $0$0
Voice control for nav and audio $100$100
Instruments, Lights, and Mirrors 
Approach detection $25$25
Auto-dimming headlights  $200
Automatic headlights $125$125
Compass $0$0
Fog lights$125  
Power-folding mirrors $50$50
Steering-linked headlights $150$150
Trip computer $150$150
Turn signals on or near mirrors $25$25
Seats and Interior Trim 
Cooled or ventilated front seats  $300
Folding second row seats $300$300
Heated front row armrests $100$100
Heated front seats$200  
Heated second row seats  $200
Manual height adjuster, passenger seat $50 
Memory system, driver seat $200$200
Power 4-way lumbar adjuster, driver seat $150$150
Power fore-aft adjuster, passenger seat  $100
Power height adjuster, passenger seat  $100
Power lumbar adjuster, driver seat$100  
Power lumbar adjuster, passenger seat  $100
Power recliner, passenger seat  $100
Power tilt adjuster, passenger seat  $100
Synthetic suede inserts in leather seating surfaces$0  
Suspension, Wheels, and Tires 
Electronic systems calibration selector $200$200
Machined alloy wheels $350$350
Performance steering system (optional) $0$0
Polished alloy wheels$350  
Transmission 
Steering-wheel-mounted transmission controls $100$100
Total Value of Features$3,115$5,525$10,475
Value of Feature Adjustments$0$2,410$7,360
Value of Feature Adjustments0-2,244-6,833

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Specifications Comparison: Mazda RX-8 vs. Kia Optima

Model Year20062016
ModelRX-8Optima
Body4dr Coupe4dr Sedan
Wheelbase106.4 in110.4 in
Length174.3 in191.1 in
Width69.7 in73.2 in
Height52.8 in57.7 in
Curb Weight3,045 lb.3,494 lb.
Fuel Capacity15.9 gal.18.5 gal.
Row 1 Headroom38.2 in39.8 in
Row 1 Shoulder Room54.8 in58.1 in
Row 1 Hip Room53.3 in56.0 in
Row 1 Legroom42.7 in45.5 in
Row 2 Headroom36.8 in37.8 in
Row 2 Shoulder Room54.9 in56.4 in
Row 2 Hip Room48.1 in56.0 in
Row 2 Legroom32.2 in35.6 in
Cargo Volume7.6 ft315.9 ft3

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Option Package Details
Mazda RX-8 Base (manual)

Shinka Package
FeatureValueRequested?
Leather seating surfaces900Yes
CD changer, in-dash200No
Satellite radio200Yes
Synthetic suede inserts in leather seating surfaces0No
Polished alloy wheels0No
Paint, special0No
Water-repellent front-door glass15No
Comfort suspension (upgrade)0No
Proximity key250Yes
Heated mirrors25Yes
Heated front seats200No
Power fore-aft adjuster, driver seat100Yes
Power height adjuster, driver seat50Yes
Power tilt adjuster, driver seat100Yes
Power recliner, driver seat100Yes
Power lumbar adjuster, driver seat100Yes
Traction control100Yes
Stability control400Yes
Fog lights125No
Xenon HID headlights500Yes
Sunroof900Yes
Universal garage door opener100Yes
Auto-dimming rearview mirror150Yes
Bose, 300W, 9 speakers350No
225/45ZR18 tires400No
Total Requested397575%
Total Not Requested129025%

Option Package Details
Kia Optima SX

Universal garage door opener
FeatureValueRequested?
Universal garage door opener100Yes
Compass0No
Total Requested100100%
Total Not Requested00%

Option Package Details
Kia Optima SX Limited

Universal garage door opener
FeatureValueRequested?
Universal garage door opener100Yes
Compass0No
Total Requested100100%
Total Not Requested00%

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