Mazda RX-8 Mazda RX-8 2010 Kia Optima Kia Optima 2018

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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: $31,795

Kia Optima SX   
Difference: $1,400

Lowest Total Invoice: $29,608

Kia Optima SX   
Difference: $1,096

Calculate Payments

  Down Payment Interest Rate Term
Model Year20102018
ModelRX-8Optima
TrimGrand TouringSX
Body4dr Coupe4dr Sedan
Base Price $31,960 $30,500
Base Invoice $29,566 $28,380
Cargo net 40 50
Cargo mat 50  
Temporary spare tire 395  
Universal garage door opener   350
Cargo net 32 42
Cargo mat 36  
Temporary spare tire 320  
Universal garage door opener   291
Options (change) 485 400
Options (change) 388 333
Destination 750 895
Total Price $33,195 $31,795
Total Invoice $30,704 $29,608

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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: $5,750
TrueDelta Adjusted Invoice Difference: $5,147
Model Year20102018
ModelRX-8Optima
TrimGrand TouringSX
Body4dr Coupe4dr Sedan
Engine232hp R2245hp I4
TransmissionM6T6
DrivetrainRWDFWD
EPA Fuel Economy (city/highway)/ MPG/ MPG
Audio (watts, speakers)300, 9?, 6
Tire (rear if not all the same)225/45-18235/45-18
Total Price$33,195$31,795
Adjustments for Features0-4,350
Feature-Adjusted Total Price$33,195$27,445
Total Invoice$30,704$29,608
Adjustments for Features0-4,051
Feature-Adjusted Total Invoice$30,704$25,557

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Features Comparison: Mazda RX-8 vs. Kia Optima

Model Year20102018
ModelRX-8Optima
TrimGrand TouringSX
Body4dr Coupe4dr Sedan
Transmission and Drivetrain 
6-speed manual$150 
6-speed manually-shiftable automatic $1100
RWD$0 
FWD $0
Accessories 
Power rear side windows $200
Proximity trunk or liftgate opener $125
Tilt steering wheel, manual$150 
Tilt/telescoping steering wheel, manual $250
Brakes, Airbags, and Other Safety 
911 assist $25
Active or whiplash-reducing head restraints, front seats $0
Blind spot warning system $200
Brake assist $50
Cross-traffic warning, rear $100
Knee airbag, driver $75
Obstacle detection, rear $250
Rearview camera $200
Rollover sensor $50
Vehicle health reports $0
Cargo Management 
Rear seat pass-through$100 
Second-row high console$250 
Climate Control 
Dual-zone climate control $125
Rain-sensing wipers$175 
Rear air vents $100
Variable intermittent wipers $75
Drivetrain 
Limited-slip rear differential$300 
Exterior 
Black exterior trim (optional) $0
Laminated front side windows $200
Painted brake calipers (optional) $0
Panoramic sunroof $1200
Sunroof$900 
Infotainment 
Android Auto support $100
App support $0
Apple CarPlay support $100
Bluetooth audio streaming $25
CD changer, in-dash$325 
MP3-compatible player$50 
SMS text-to-speech reader $25
Surround sound$250 
USB port $25
Voice control for external devices $0
Instruments, Lights, and Mirrors 
Approach detection $25
Compass $0
Interior ambient lighting $150
LED headlights $1000
Power-folding mirrors $50
Steering-linked headlights $150
Trip computer $150
Turn signals on or near mirrors $25
Xenon HID headlights$500 
Seats and Interior Trim 
Cooled or ventilated front seats $300
Door sill trim plates$100 
Folding second row seats $300
Power 4-way lumbar adjuster, driver seat $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
Suspension, Wheels, and Tires 
Alloy wheels$350 
Electronic systems calibration selector $200
Machined alloy wheels $350
Performance steering system (optional) $0
Sport suspension (upgrade) $0
Transmission 
Steering-wheel-mounted transmission controls $100
Total Value of Features$3,700$8,050
Value of Feature Adjustments$0$4,350
Value of Feature Adjustments0-4,051

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Specifications Comparison: Mazda RX-8 vs. Kia Optima

Model Year20102018
ModelRX-8Optima
Body4dr Coupe4dr Sedan
Wheelbase106.4 in110.4 in
Length175.6 in191.1 in
Width69.7 in73.2 in
Height52.8 in57.7 in
Curb Weight3,065 lb.3,220 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
Kia Optima SX

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

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