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Compare BMW i8 Coupe vs Mercedes-AMG GT vs Porsche 718 Cayman GT4

BMW i8 Coupe
2019 BMW i8 Coupe
Select configuration:
$147,500
Starting Price (MSRP)
8.6
BMW i8 Coupe Full Review
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Mercedes-AMG GT
2020 Mercedes-AMG GT
Select configuration:
$115,900
Starting Price (MSRP)
8.9
Mercedes-AMG GT Full Review
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Porsche 718 Cayman GT4
2020 Porsche 718 Cayman GT4
Select configuration:
$99,200
Starting Price (MSRP)
8.4
Porsche 718 Cayman GT4 Full Review
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Overview

Engine
1.5-liter Turbo Inline-3 Plug-in Hybrid
Engine
4.0-liter Twin-Turbo V8 Gas
Engine
4.0-liter Flat 6 Gas
Transmission
6-Speed Automatic
Transmission
7-Speed Automatic
Transmission
6-Speed Manual
Drivetrain
All-Wheel Drive
Drivetrain
Rear-Wheel Drive
Drivetrain
Rear-Wheel Drive
Fuel Economy
N/A
Fuel Economy
City: 16 MPG
Hwy: 22 MPG
Fuel Economy
N/A
Fuel Tank Capacity
11.1 gallons
Fuel Tank Capacity
19.8 gallons
Fuel Tank Capacity
16.9 gallons
Seating Capacity
4 seater
Seating Capacity
2 seater
Seating Capacity
2 seater
Trunk Volume
5.4 ft³
Trunk Volume
N/A
Trunk Volume
N/A

Photos

16
More
35
More
15
More

Performance Specs

Engine and Transmission

Engine
1.5-liter Turbo Inline-3 Plug-in Hybrid
4.0-liter Twin-Turbo V8 Gas
4.0-liter Flat 6 Gas
Horsepower
369 hp @ 5800 rpm
469 hp @ 6000 rpm
414 hp @ 7600 rpm
Torque
420 lb-ft
465 lb-ft @ 1700 rpm
309 lb-ft @ 5000 rpm
Transmission
6-Speed Automatic
7-Speed Automatic
6-Speed Manual
Drivetrain
All-Wheel Drive
Rear-Wheel Drive
Rear-Wheel Drive

Steering

Steering Type
Rack-Pinion
Rack-Pinion
Rack-Pinion
Turning Diameter
40.4 ft
37.7 ft
37.5 ft

Wheels

Wheels Type
Aluminum Wheels
Aluminum Wheels
N/A
Front Wheel Size
20" x 7.5"
19" x 9"
20" x 8.5"
Rear Wheel Size
20" x 8.5"
19" x 11"
20" x 11"

Suspension

Front Suspension
Double Wishbone
Double Wishbone
Strut
Rear Suspension
Multi-Link
Double Wishbone
Strut

Tires

Front Tire
P215/45YR20
P255/35ZR19
P245/35ZR20
Rear Tire
P245/40YR20
P295/30ZR19
P295/30ZR20

Fuel and MPG

Fuel Economy

Combined
27 MPG
18 MPG
N/A
City
N/A
16 MPG
N/A
Highway
N/A
22 MPG
N/A

Emissions

CO2 Emissions @ 15K mi/year
N/A
9.8 Tons/yr
N/A

Fuel Tank

Fuel Tank Capacity
11.1 gallons
19.8 gallons
16.9 gallons
Cruising Range City
N/A
316.8 miles
N/A
Cruising Range Highway
N/A
435.6 miles
N/A

Dimensions and Measurement

Exterior Dimensions

Length
184.9 in
179 in
175.5 in
Height
50.8 in
50.7 in
50 in
Max Width
76.5 in
76.3 in
71 in
Front Width
64.7 in
66.1 in
60.6 in
Rear Width
67.8 in
65 in
60.4 in
Wheelbase
110.2 in
103.5 in
97.8 in

Interior Space

Seating Capacity
4 seater
2 seater
2 seater
Front Seat Leg Room
43.1 in
N/A
N/A
Front Seat Headroom
38.7 in
39.5 in
N/A
Front Seat Shoulder Room
56.7 in
N/A
N/A
Rear Seat Leg Room
28.2 in
N/A
N/A
Rear Seat Headroom
32.4 in
N/A
N/A
Rear Seat Shoulder Room
49.6 in
N/A
N/A

Weight and Trailing

Curb Weight
3,501 lbs
3,560 lbs
3,199 lbs

Cargo Space

Trunk Volume
5.4 ft³
N/A
N/A

Colors and Materials

Standard Exterior Colors

  • E-Copper Metallic w/Frozen Grey Accent
  • Individual Donington Grey Met w/Frozen Grey Accent
  • Sophisto Gray Metallic w/BMW i Frozen Blue Accent
  • Sophisto Gray Metallic w/Frozen Gray Accent
  • Black
  • Jupiter Red
  • Black
  • Guards Red
  • Racing Yellow
  • White

Optional Exterior Colors

  • Crystal White Pearl Metallic w/BMW i Frozen Blue
  • Crystal White Pearl Metallic w/Frozen Gray Accent
  • Brilliant Blue Metallic
  • Iridium Silver Metallic
  • Magnetite Black Metallic
  • Selenite Grey Metallic
  • designo Cardinal Red
  • designo Diamond White
  • designo Brilliant Blue Magno
  • designo Iridium Silver Magno
  • designo Magno Selenite Grey
  • Carrara White Metallic
  • Gentian Blue Metallic
  • GT Silver Metallic
  • Chalk
  • Miami Blue

Standard Interior Materials

  • E-Copper Exclusive, Natural Leather/Cloth Upholstery
  • Giga Amido, Full Perforated Leather Upholstery
  • Giga Ivory White, Full Perforated Leather Upholstery
  • Tera Excl Dalbergia Brown, Natural Leather/Cloth Upholstery
  • Black, MB-Tex/DINAMICA Upholstery
  • Black, Nappa Leather Upholstery
  • Nut Brown, Nappa Leather Upholstery
  • Red Pepper/Black, Nappa Leather Upholstery
  • Silver Pearl/Black, Nappa Leather Upholstery
  • Black, Partial Leather Seat Trim w/Alcantara Seat Centers

Optional Interior Materials

N/A
N/A
  • Black w/Red Stitching, Leather Seat Trim
  • Black w/Silver Stitching, Leather Seat Trim
  • Black w/Yellow Stitching, Leather Seat Trim

Features and Options

Infotainment

HD Radio
Not Available
Standard
Not Available
Bluetooth Connection
Standard
Standard
Standard
Hard Disk Drive Media Storage
Standard
Standard
Standard
Premium Sound System
Standard
Optional
Optional
Satellite Radio
Standard
Standard
Not Available
Smart Device Integration
Standard
Standard
Optional
Auxiliary Audio Input
Standard
Standard
Standard
MP3 Player
Standard
Standard
Standard

Interior Trim

Bucket Seats
Standard
Standard
Not Available
Cloth Seats
Standard
Standard
Optional
Leather Seats
Standard
Standard
Standard
Leather Steering Wheel
Standard
Standard
Optional
Premium Synthetic Seats
Standard
Standard
Standard
Vinyl Seats
Standard
Standard
Optional
Sun/Moonroof
Not Available
Optional
Not Available

Comfort

Head-Up Display
Standard
Not Available
Not Available
Navigation System
Standard
Standard
Optional
Steering Wheel Audio Controls
Standard
Standard
Optional
Power Mirror(s)
Standard
Standard
Standard
A/C
Standard
Standard
Standard
Adaptive Cruise Control
Not Available
Optional
Not Available
Automatic Parking
Not Available
Standard
Not Available
Climate Control
Standard
Standard
Optional
Cooled Front Seat(s)
Not Available
Optional
Not Available
Cruise Control
Standard
Standard
Standard
Hands-Free Liftgate
Not Available
Optional
Not Available
Heated Front Seat(s)
Standard
Standard
Optional
Heated Steering Wheel
Not Available
Not Available
Optional
Keyless Entry
Standard
Standard
Standard
Multi-Zone A/C
Standard
Standard
Optional
Power Driver Seat
Standard
Standard
Not Available
Power Passenger Seat
Standard
Standard
Not Available
Remote Trunk Release
Not Available
Optional
Not Available
Seat Memory
Not Available
Standard
Not Available
Universal Garage Door Opener
Standard
Standard
Standard
Keyless Start
Standard
Standard
Not Available
Telematics
Standard
Standard
Not Available

Safety

Safety Features

Back-Up Camera
Standard
Standard
Standard
Cross-Traffic Alert
Standard
Not Available
Not Available
Rear Parking Aid
Standard
Not Available
Standard
Blind Spot Monitor
Standard
Optional
Not Available
Lane Departure Warning
Standard
Optional
Not Available
Lane Keeping Assist
Not Available
Optional
Not Available
ABS
Standard
Standard
Standard
Tire Pressure Monitor
Standard
Standard
Standard
Brake Assist
Standard
Standard
Standard
Stability Control
Standard
Standard
Standard
Traction Control
Standard
Standard
Standard

Airbags

Driver Air Bag
Standard
Standard
Standard
Front Head Air Bag
Standard
Standard
Standard
Front Side Air Bag
Standard
Standard
Standard
Knee Air Bag
Standard
Standard
Standard
Passenger Air Bag
Standard
Standard
Standard
Rear Head Air Bag
Standard
Not Available
Not Available

Warranty

Warranty Summary

Basic
4 Years / 50,000 Miles
4 Years / 50,000 Miles
4 Years / 50,000 Miles
Corrosion
12 Years / Unlimited Miles
4 Years / 50,000 Miles
12 Years / Unlimited Miles
Drivetrain
4 Years / 50,000 Miles
4 Years / 50,000 Miles
4 Years / 50,000 Miles
Hybrid/Electric Components
8 Years / 100,000 Miles
N/A
N/A
Maintenance
3 Years / 36,000 Miles
N/A
N/A
Roadside Assistance
4 Years / Unlimited Miles
4 Years / 50,000 Miles
4 Years / 50,000 Miles