Mazda RX-8 Mazda RX-8 2006 Kia Optima Kia Optima 2007

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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: $22,335

Kia Optima EX   
Difference: $10,255

Lowest Total Invoice: $20,720

Kia Optima EX   
Difference: $9,046

Calculate Payments

  Down Payment Interest Rate Term
Model Year200620062007
ModelRX-8RX-8Optima
TrimBase (automatic)Base (manual)EX
Body4dr Coupe4dr Coupe4dr Sedan
Base Price $26,435 $26,435 $19,395
Base Invoice $24,458 $24,458 $18,045
Grand Touring Package 5,210 4,510  
Rear spoiler 360 360 200
Cassette player 225 225  
CD changer, in-dash 500 500  
Leather seating surfaces     600
Convenience Package     700
Sunroof     800
Grand Touring Package 4,482 3,880  
Rear spoiler 288 288 160
Cassette player 180 180  
CD changer, in-dash 400 400  
Leather seating surfaces     535
Convenience Package     625
Sunroof     715
Options (change) 6,295 5,595 2,300
Options (change) 5,350 4,748 2,035
Destination 560 560 640
Total Price $33,290 $32,590 $22,335
Total Invoice $30,368 $29,766 $20,720

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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 EX
TrueDelta Adjusted Price Difference: $10,030
TrueDelta Adjusted Invoice Difference: $8,806
Model Year200620062007
ModelRX-8RX-8Optima
TrimBase (automatic)Base (manual)EX
Body4dr Coupe4dr Coupe4dr Sedan
Engine212hp R2238hp R2161hp I4
TransmissionT6M6T5
DrivetrainRWDRWDFWD
EPA Fuel Economy (city/highway)/ MPG/ MPG/ MPG
Audio (watts, speakers)300, 9300, 9360, 7
Tire (rear if not all the same)225/45-18225/45-18205/60-16
Total Price$33,290$32,590$22,335
Adjustments for Features-1,0500-125
Feature-Adjusted Total Price$32,240$32,590$22,210
Cost Above Minimum$0$350$0
Total Invoice$30,368$29,766$20,720
Adjustments for Features-9580-116
Feature-Adjusted Total Invoice$29,410$29,766$20,604
Cost Above Minimum$0$356$0

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Features Comparison: Mazda RX-8 vs. Kia Optima

Model Year200620062007
ModelRX-8RX-8Optima
TrimBase (automatic)Base (manual)EX
Body4dr Coupe4dr Coupe4dr Sedan
Transmission and Drivetrain 
6-speed manually-shiftable automatic$1100  
6-speed manual $150 
5-speed manually-shiftable automatic  $1000
RWD$0$0 
FWD  $0
Accessories 
Power rear side windows  $200
Power-adjustable pedals  $125
Proximity key$250$250 
Sunshade, rear  $125
Tilt steering wheel, manual$150$150 
Tilt/telescoping steering wheel, manual  $250
Brakes, Airbags, and Other Safety 
Active or whiplash-reducing head restraints, front seats  $0
Antilock brakes (ABS)$400$400 
Stability control$400$400 
Traction control$100$100 
Cargo Management 
Rear seat pass-through$100$100 
Second-row high console$250$250 
Climate Control 
Automatic climate control, front  $200
Drivetrain 
Limited-slip rear differential$300$300 
Exterior 
Bodyside moldings  $75
Bright-finished exhaust tip(s)$25$25 
Infotainment 
MP3-compatible player  $50
Instruments, Lights, and Mirrors 
Automatic headlights  $125
Trip computer  $150
Xenon HID headlights$500$500 
Seats and Interior Trim 
Folding second row seats  $300
Manual lumbar adjuster, driver seat  $50
Power fore-aft adjuster, passenger seat  $100
Power lumbar adjuster, driver seat$100$100 
Power recliner, passenger seat  $100
Suspension, Wheels, and Tires 
Sport suspension (upgrade)$0$0 
Transmission 
Steering-wheel-mounted transmission controls$100  
Total Value of Features$3,775$2,725$2,850
Value of Feature Adjustments$1,050$0$125
Value of Feature Adjustments-9580-116

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Specifications Comparison: Mazda RX-8 vs. Kia Optima

Model Year20062007
ModelRX-8Optima
Body4dr Coupe4dr Sedan
Wheelbase106.4 in107.1 in
Length174.3 in186.4 in
Width69.7 in71.1 in
Height52.8 in58.3 in
Curb Weight3,046 lb.3,143 lb.
Fuel Capacity15.9 gal.17.0 gal.
Row 1 Headroom38.2 in39.8 in
Row 1 Shoulder Room54.8 in57.1 in
Row 1 Hip Room53.3 in54.5 in
Row 1 Legroom42.7 in43.7 in
Row 2 Headroom36.8 in38.0 in
Row 2 Shoulder Room54.9 in56.3 in
Row 2 Hip Room48.1 in54.7 in
Row 2 Legroom32.2 in37.8 in
Cargo Volume7.6 ft314.8 ft3

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Option Package Details
Mazda RX-8 Base (automatic)

Grand Touring Package
FeatureValueRequested?
Leather seating surfaces900Yes
Heated mirrors25Yes
Heated front seats200Yes
Power fore-aft adjuster, driver seat100Yes
Power height adjuster, driver seat50Yes
Power tilt adjuster, driver seat100Yes
Power recliner, driver seat100Yes
Power lumbar adjuster, driver seat100No
Proximity key250No
Traction control100No
Stability control400No
Fog lights125Yes
Xenon HID headlights500No
Sunroof900Yes
Universal garage door opener100Yes
Auto-dimming rearview mirror150Yes
Bose, 300W, 9 speakers350No
Sport suspension (upgrade)250No
Performance braking system (optional)250No
Limited-slip rear differential300No
225/45ZR18 tires400No
Total Requested275049%
Total Not Requested290051%

Option Package Details
Mazda RX-8 Base (manual)

Grand Touring Package
FeatureValueRequested?
Leather seating surfaces900Yes
Heated mirrors25Yes
Heated front seats200Yes
Power fore-aft adjuster, driver seat100Yes
Power height adjuster, driver seat50Yes
Power tilt adjuster, driver seat100Yes
Power recliner, driver seat100Yes
Power lumbar adjuster, driver seat100No
Proximity key250No
Traction control100No
Stability control400No
Fog lights125Yes
Xenon HID headlights500No
Sunroof900Yes
Universal garage door opener100Yes
Auto-dimming rearview mirror150Yes
Bose, 300W, 9 speakers350No
225/45ZR18 tires400No
Total Requested275057%
Total Not Requested210043%

Option Package Details
Kia Optima EX

Convenience Package
FeatureValueRequested?
Heated front seats200Yes
Power recliner, passenger seat100No
Power fore-aft adjuster, passenger seat100No
Sunshade, rear125No
Power-adjustable pedals125No
Total Requested20031%
Total Not Requested45069%

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