Kia Optima Kia Optima 2007 Mazda RX-8 Mazda RX-8 2008

We are 103,000+ car owners sharing real-world car information.

Join Us

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: $22,335

Kia Optima EX   
Difference: $9,970

Lowest Total Invoice: $20,720

Kia Optima EX   
Difference: $9,133

Calculate Payments

  Down Payment Interest Rate Term
Model Year200720082008
ModelOptimaRX-8RX-8
TrimEXAutomaticManual
Body4dr Sedan4dr Coupe4dr Coupe
Base Price $19,395 $26,435 $26,435
Base Invoice $18,045 $24,458 $24,458
Rear spoiler 200 360 360
Sunroof 800    
Leather seating surfaces 600    
Convenience Package 700    
Grand Touring Package   5,335 4,635
Cassette player   225 225
Rear spoiler 160 288 288
Sunroof 715    
Leather seating surfaces 535    
Convenience Package 625    
Grand Touring Package   4,922 4,277
Cassette player   180 180
Options (change) 2,300 5,920 5,220
Options (change) 2,035 5,390 4,745
Destination 640 650 650
Total Price $22,335 $33,005 $32,305
Total Invoice $20,720 $30,498 $29,853

Return to top

While we strive for accuracy, the site is not error-free, and prices can change at any time.

Dealer Price Quotes

Want to find out how much dealers are willing to discount these cars?

Request free, no-obligation Kia Optima dealer quotes or Mazda RX-8 dealer quotes from dealers using our car quote form.

The process is easy and takes just a minute or two. You'll receive price quotes from local approved dealers within 48 hours.

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

Lowest Adjusted Price and Invoice: Kia Optima EX
TrueDelta Adjusted Price Difference: $9,745
TrueDelta Adjusted Invoice Difference: $8,924
Model Year200720082008
ModelOptimaRX-8RX-8
TrimEXAutomaticManual
Body4dr Sedan4dr Coupe4dr Coupe
Engine161hp I4212hp R2232hp R2
TransmissionT5T6M6
DrivetrainFWDRWDRWD
EPA Fuel Economy (city/highway)/ MPG/ MPG/ MPG
Audio (watts, speakers)360, 7300, 9300, 9
Tire (rear if not all the same)205/60-16225/45-18225/45-18
Total Price$22,335$33,005$32,305
Adjustments for Features-125-1,0500
Feature-Adjusted Total Price$22,210$31,955$32,305
Cost Above Minimum$0$0$350
Total Invoice$20,720$30,498$29,853
Adjustments for Features-116-9700
Feature-Adjusted Total Invoice$20,604$29,528$29,853
Cost Above Minimum$0$0$325

Return to top

Features Comparison: Kia Optima vs. Mazda RX-8

Model Year200720082008
ModelOptimaRX-8RX-8
TrimEXAutomaticManual
Body4dr Sedan4dr Coupe4dr Coupe
Transmission and Drivetrain 
5-speed manually-shiftable automatic$1000  
6-speed manually-shiftable automatic $1100 
6-speed manual  $150
FWD$0  
RWD $0$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$2,850$3,775$2,725
Value of Feature Adjustments$125$1,050$0
Value of Feature Adjustments-116-9700

Return to top

Specifications Comparison: Kia Optima vs. Mazda RX-8

Model Year20072008
ModelOptimaRX-8
Body4dr Sedan4dr Coupe
Wheelbase107.1 in106.4 in
Length186.4 in174.3 in
Width71.1 in69.7 in
Height58.3 in52.8 in
Curb Weight3,143 lb.3,046 lb.
Fuel Capacity17.0 gal.15.9 gal.
Row 1 Headroom39.8 in38.2 in
Row 1 Shoulder Room57.1 in54.8 in
Row 1 Hip Room54.5 in53.3 in
Row 1 Legroom43.7 in42.7 in
Row 2 Headroom38.0 in36.8 in
Row 2 Shoulder Room56.3 in54.9 in
Row 2 Hip Room54.7 in48.1 in
Row 2 Legroom37.8 in32.2 in
Cargo Volume14.8 ft37.6 ft3

Return to top

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%

Option Package Details
Mazda RX-8 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
CD changer, in-dash200Yes
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 Requested295050%
Total Not Requested290050%

Option Package Details
Mazda RX-8 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
CD changer, in-dash200Yes
Universal garage door opener100Yes
Auto-dimming rearview mirror150Yes
Bose, 300W, 9 speakers350No
225/45ZR18 tires400No
Total Requested295058%
Total Not Requested210042%

Was this information useful?

We're glad we could help! Share this page:

We're so sorry! Tell us how we can improve it.

See TrueDelta's information for all Sedans and Wagons.
See TrueDelta's information for all Kia models.