Kia Optima Kia Optima 2017 Mazda RX-8 Mazda RX-8 2006

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Kia Optima vs. Mazda RX-8 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.

Kia Optima vs. Mazda RX-8 Invoice Comparison

Lowest Total Price: $31,235

Kia Optima SX   
Difference: $4,375

Lowest Total Invoice: $29,093

Kia Optima SX   
Difference: $3,306

Calculate Payments

  Down Payment Interest Rate Term
Model Year201720172006
ModelOptimaOptimaRX-8
TrimSXSX LimitedBase (manual)
Body4dr Sedan4dr Sedan4dr Coupe
Base Price $26,855 $36,090 $26,435
Base Invoice $25,023 $33,481 $24,458
SX Base Package 3,085    
Cargo net 50 50 40
Universal garage door opener 350 350  
Shinka Package     6,165
Navigation system     2,000
Rear spoiler     360
Cargo mat     50
SX Base Package 2,842    
Cargo net 42 42 32
Universal garage door opener 291 291  
Shinka Package     5,304
Navigation system     1,721
Rear spoiler     288
Cargo mat     36
Options (change) 3,485 400 8,615
Options (change) 3,175 333 7,381
Destination 895 895 560
Total Price $31,235 $37,385 $35,610
Total Invoice $29,093 $34,709 $32,399

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

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

Lowest Adjusted Price and Invoice: Kia Optima SX
TrueDelta Adjusted Price Difference: $7,485
TrueDelta Adjusted Invoice Difference: $6,203
Model Year201720172006
ModelOptimaOptimaRX-8
TrimSXSX LimitedBase (manual)
Body4dr Sedan4dr Sedan4dr Coupe
Engine245hp I4245hp I4238hp R2
TransmissionT6T6M6
DrivetrainFWDFWDRWD
EPA Fuel Economy (city/highway)22/31 MPG22/31 MPG18/24 MPG
Audio (watts, speakers)?, 6630, 10300, 9
Tire (rear if not all the same)235/45-18235/45-18225/45-18
Total Price$31,235$37,385$35,610
Adjustments for Features-3,110-8,1350
Feature-Adjusted Total Price$28,125$29,250$35,610
Cost Above Minimum$0$1,125$0
Total Invoice$29,093$34,709$32,399
Adjustments for Features-2,897-7,5530
Feature-Adjusted Total Invoice$26,196$27,156$32,399
Cost Above Minimum$0$960$0

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Features Comparison: Kia Optima vs. Mazda RX-8

Model Year201720172006
ModelOptimaOptimaRX-8
TrimSXSX LimitedBase (manual)
Body4dr Sedan4dr Sedan4dr Coupe
Transmission and Drivetrain 
6-speed manually-shiftable automatic$1100$1100 
6-speed manual  $150
FWD$0$0 
RWD  $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 
Apple CarPlay support$100$100 
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 
Wireless charging station $75 
Instruments, Lights, and Mirrors 
Approach detection$25$25 
Auto-dimming headlights $200 
Automatic headlights$125$125 
Compass$0$0 
Fog lights  $125
LED headlights$1000$1000 
Power-folding mirrors$50$50 
Steering-linked headlights$150$150 
Trip computer$150$150 
Turn signals on or near mirrors$25$25 
Xenon HID headlights  $500
Seats and Interior Trim 
Cooled or ventilated front seats $300 
Folding second row seats$300$300 
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  
Performance steering system (optional)$0$0 
Polished alloy wheels $350$350
Transmission 
Steering-wheel-mounted transmission controls$100$100 
Total Value of Features$6,525$11,550$3,415
Value of Feature Adjustments$3,110$8,135$0
Value of Feature Adjustments-2,897-7,5530

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Specifications Comparison: Kia Optima vs. Mazda RX-8

Model Year20172006
ModelOptimaRX-8
Body4dr Sedan4dr Coupe
Wheelbase110.4 in106.4 in
Length191.1 in174.3 in
Width73.2 in69.7 in
Height57.7 in52.8 in
Curb Weight3,494 lb.3,045 lb.
Fuel Capacity18.5 gal.15.9 gal.
Row 1 Headroom39.8 in38.2 in
Row 1 Shoulder Room58.1 in54.8 in
Row 1 Hip Room56.0 in53.3 in
Row 1 Legroom45.5 in42.7 in
Row 2 Headroom37.8 in36.8 in
Row 2 Shoulder Room56.4 in54.9 in
Row 2 Hip Room56.0 in48.1 in
Row 2 Legroom35.6 in32.2 in
Cargo Volume15.9 ft37.6 ft3

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Option Package Details
Kia Optima SX

SX Base Package
FeatureValueRequested?
Auto-dimming rearview mirror150Yes
Steering-linked headlights150No
Door sill trim plates100No
LED headlights1000No
Navigation system600Yes
Voice control for nav and audio100No
Traffic information25No
HD radio50No
Proximity key250Yes
Perimeter approach lighting25No
Approach detection25No
Proximity trunk or liftgate opener125No
Total Requested100038%
Total Not Requested160062%

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 wheels350Yes
Paint, special0No
Water-repellent front-door glass15No
Comfort suspension (upgrade)0No
Power tilt adjuster, driver seat100Yes
Power recliner, driver seat100Yes
Power lumbar adjuster, driver seat100Yes
Proximity key250Yes
Heated mirrors25Yes
Heated front seats200Yes
Power fore-aft adjuster, driver seat100Yes
Power height adjuster, driver seat50Yes
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 Requested452581%
Total Not Requested109019%

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