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Compare 2015 BMW i8 vs 2015 Porsche 918 Spyder

2015 BMW i8 Change
2015 Porsche 918 Spyder Change
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Selected Style 2-Door Coupe 2-Door Roadster
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Body Style


Style MPG City MPG Hwy Invoice MSRP
2-Door Roadster 20 24 N/A $845,000
2-Door Roadster w/Weissach Pkg 20 24 N/A $929,000
Invoice Price
Manufacturer Suggested Retail Price
Monthly Payment Estimate
$2275 / month
$14083 / month
Dealer Price Quotes
The Car Connection's Take
TCC Rating
/ 10
TCC Rating
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or “Go” (green) messages along with the numerical score so you can easily understand where we stand at a glance.

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Read Our Full Review
/ 10
TCC Rating
Read Our Full Review
TCC’s Bottom Line The 2015 BMW i8 is a ground-breaking new sports coupe with a plug-in hybrid powertrain that delivers several driving personalities from which the driver can choose. The 2015 Porsche 918 Spyder delivers unheralded levels of both performance and efficiency in a supercar.
TCC Likes
TCC Dislikes
Fuel Economy
Fuel Economy - City N/A mpg 20 mpg
Fuel Economy - Highway N/A mpg 24 mpg
EPA Classification Subcompact Cars Two-Seaters
Interior Dimensions
Second Shoulder Room (in) 49.6 -
Front Head Room (in) 38.7 -
Passenger Volume (ft³) 81 -
Front Shoulder Room (in) 56.7 -
Second Leg Room (in) 28.2 -
Passenger Capacity 4 2
Front Leg Room (in) 43.1 -
Second Head Room (in) 32.4 -
Exterior Dimensions
Track Width, Front (in) 64.7 65.5
Length, Overall (in) 184.9 182.9
Height, Overall (in) 50.8 46
Track Width, Rear (in) 67.8 63.5
Wheelbase (in) 110.2 107.5
Width, Max w/o mirrors (in) 76.5 76.4
Cargo Area Dimensions
Trunk Volume (ft³) 4.7 -
Front Brake Rotor Diam x Thickness (in) 13.4 16.1
Drum - Rear (Yes or ) NA NA
Brake ABS System 4-Wheel 4-Wheel
Disc - Rear (Yes or ) Yes Yes
Rear Brake Rotor Diam x Thickness (in) 13 15.4
Rear Drum Diam x Width (in) NA NA
Disc - Front (Yes or ) Yes Yes
Fuel Tank
Fuel Tank Capacity, Approx (gal) 11.1 18.5
Steering Type Rack-Pinion Rack-Pinion
Turning Diameter - Curb to Curb (ft) 40.4 41.7
Front Tire Order Code NA NA
Spare Tire Order Code NA NA
Rear Tire Size P245/40YR20 P325/30YR21
Rear Tire Order Code NA NA
Front Tire Size P215/45YR20 P265/35YR20
Spare Tire Size NA NA
Weight Information
Base Curb Weight (lbs) 3455 3692
Rear Wheel Size (in) 20 X 8.5 21 X 12.5
Front Wheel Material Aluminum Forged Aluminum
Spare Wheel Material NA NA
Front Wheel Size (in) 20 X 7.5 20 X 9.5
Spare Wheel Size (in) NA NA
Rear Wheel Material Aluminum Forged Aluminum
Displacement 1.5 L/91 4.6 L
SAE Net Horsepower @ RPM 357 @ 5800 887 @ 8600
Engine Type Intercooled Turbo Gas/Electric I-3 Gas/Electric V-8
Fuel System Gasoline Direct Injection Gasoline Direct Injection
SAE Net Torque @ RPM 420 944 @ 5000
Engine Order Code NA NA
Fuel Economy Est-Combined (MPG) 28 (Est) 22
Battery Range (mi) 15 18
EPA MPG Equivalent - Combined 76 67
EPA Fuel Economy Est - City (MPG) - 20
EPA Fuel Economy Est - Hwy (MPG) - 24
Final Drive Axle Ratio (:1) 3.68 3.09
Third Gear Ratio (:1) 1.56 1.58
Trans Type 6 7
Fifth Gear Ratio (:1) 0.85 0.97
Trans Description Cont. Again NA NA
Drivetrain All Wheel Drive All Wheel Drive
Reverse Ratio (:1) 3.19 3.55
Second Gear Ratio (:1) 2.51 2.29
Trans Order Code NA 250
Fourth Gear Ratio (:1) 1.14 1.19
Trans Description Cont. Automatic w/OD Auto-Shift Manual w/OD
Sixth Gear Ratio (:1) 0.67 0.83
First Gear Ratio (:1) 4.46 3.91
Seventh Gear Ratio (:1) - 0.67
Vehicle Name BMW i8 Porsche 918 Spyder
Body Style Coupe Roadster
Suspension Type - Rear Multi-Link Multi-Link
Suspension Type - Rear (Cont.) Multi-Link Multi-Link
Suspension Type - Front Double Wishbone Double Wishbone
Suspension Type - Front (Cont.) Double Wishbone Double Wishbone
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