Kia Optima Kia Optima 2006 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: $22,165

Kia Optima EX   
Difference: $10,425

Lowest Total Invoice: $20,317

Kia Optima EX   
Difference: $9,449

Calculate Payments

  Down Payment Interest Rate Term
Model Year200620062006
ModelOptimaRX-8RX-8
TrimEXBase (automatic)Base (manual)
Body4dr Sedan4dr Coupe4dr Coupe
Base Price $19,100 $26,435 $26,435
Base Invoice $17,605 $24,458 $24,458
Leather Package 1,000    
Floor mats 85    
Antilock brakes (ABS) 795    
Rear spoiler 220 360 360
CD changer, remote 375    
Grand Touring Package   5,210 4,510
Cassette player   225 225
CD changer, in-dash   500 500
Leather Package 890    
Floor mats 65    
Antilock brakes (ABS) 710    
Rear spoiler 169 288 288
CD changer, remote 288    
Grand Touring Package   4,482 3,880
Cassette player   180 180
CD changer, in-dash   400 400
Options (change) 2,475 6,295 5,595
Options (change) 2,122 5,350 4,748
Destination 590 560 560
Total Price $22,165 $33,290 $32,590
Total Invoice $20,317 $30,368 $29,766

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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 EX
TrueDelta Adjusted Price Difference: $9,125
TrueDelta Adjusted Invoice Difference: $8,227
Model Year200620062006
ModelOptimaRX-8RX-8
TrimEXBase (automatic)Base (manual)
Body4dr Sedan4dr Coupe4dr Coupe
Engine138hp I4212hp R2238hp R2
TransmissionT4T6M6
DrivetrainFWDRWDRWD
EPA Fuel Economy (city/highway)/ MPG/ MPG/ MPG
Audio (watts, speakers)120, 6300, 9300, 9
Tire (rear if not all the same)205/60-15225/45-18225/45-18
Total Price$22,165$33,290$32,590
Adjustments for Features0-2,000-950
Feature-Adjusted Total Price$22,165$31,290$31,640
Cost Above Minimum$0$0$350
Total Invoice$20,317$30,368$29,766
Adjustments for Features0-1,824-868
Feature-Adjusted Total Invoice$20,317$28,544$28,898
Cost Above Minimum$0$0$354

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Features Comparison: Kia Optima vs. Mazda RX-8

Model Year200620062006
ModelOptimaRX-8RX-8
TrimEXBase (automatic)Base (manual)
Body4dr Sedan4dr Coupe4dr Coupe
Transmission and Drivetrain 
4-speed manually-shiftable automatic$900  
6-speed manually-shiftable automatic $1100 
6-speed manual  $150
FWD$0  
RWD $0$0
Accessories 
Power rear side windows$200  
Proximity key $250$250
Brakes, Airbags, and Other Safety 
Side curtain airbags $350$350
Stability control $400$400
Tire-pressure monitor $75$75
Traction control $100$100
Cargo Management 
Overhead sunglass holder $25$25
Rear seat pass-through $100$100
Second-row high console $250$250
Climate Control 
Automatic climate control, front$200  
Interior air filter $0$0
Drivetrain 
Limited-slip rear differential $300$300
Exterior 
Bodyside moldings$75  
Bright-finished exhaust tip(s) $25$25
Infotainment 
Audio controls on steering wheel $125$125
CD changer, in-dash $325$325
CD changer, remote$200  
CD player$125  
Instruments, Lights, and Mirrors 
Automatic headlights$125  
Outside temperature display $50$50
Xenon HID headlights $500$500
Seats and Interior Trim 
Folding second row seats$300  
Heated front seats $200$200
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$2,375$4,375$3,325
Value of Feature Adjustments$0$2,000$950
Value of Feature Adjustments0-1,824-868

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Specifications Comparison: Kia Optima vs. Mazda RX-8

Model Year20062006
ModelOptimaRX-8
Body4dr Sedan4dr Coupe
Wheelbase106.3 in106.4 in
Length185.8 in174.3 in
Width71.5 in69.7 in
Height55.5 in52.8 in
Curb Weight3,282 lb.3,046 lb.
Fuel Capacity17.2 gal.15.9 gal.
Row 1 Headroom39.0 in38.2 in
Row 1 Shoulder Room56.9 in54.8 in
Row 1 Hip Room55.8 in53.3 in
Row 1 Legroom43.3 in42.7 in
Row 2 Headroom37.6 in36.8 in
Row 2 Shoulder Room55.7 in54.9 in
Row 2 Hip Room54.4 in48.1 in
Row 2 Legroom36.2 in32.2 in
Cargo Volume13.6 ft37.6 ft3

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Option Package Details
Kia Optima EX

Leather Package
FeatureValueRequested?
Leather seating surfaces900Yes
Power recliner, passenger seat100No
Power fore-aft adjuster, passenger seat100No
Total Requested90082%
Total Not Requested20018%

Option Package Details
Mazda RX-8 Base (automatic)

Grand Touring Package
FeatureValueRequested?
Leather seating surfaces900Yes
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 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 Requested255045%
Total Not Requested310055%

Option Package Details
Mazda RX-8 Base (manual)

Grand Touring Package
FeatureValueRequested?
Leather seating surfaces900Yes
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 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 Requested255053%
Total Not Requested230047%

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