Compare BMW i8 Roadster vs Mercedes-AMG GT Roadster vs Porsche 911 Targa 4

BMW i8 Roadster
2020 BMW i8 Roadster
Select configuration:
$163,300
Starting Price (MSRP)
8.3
BMW i8 Roadster For SaleBMW i8 Roadster Full ReviewBMW i8 Roadster Trims Comparison
Mercedes-AMG GT Roadster
2021 Mercedes-AMG GT Roadster
Select configuration:
$130,700
Starting Price (MSRP)
8.8
Mercedes-AMG GT Roadster For SaleMercedes-AMG GT Roadster Full ReviewMercedes-AMG GT Roadster Trims Comparison
Porsche 911 Targa 4
2022 Porsche 911 Targa 4
Select configuration:
$121,300
Starting Price (MSRP)
8.8
Porsche 911 Targa 4 For SalePorsche 911 Targa 4 Full ReviewPorsche 911 Targa 4 Trims Comparison

Overview

Engine
1.5L Turbo Inline-3 Plug-in Hybrid
Engine
4.0L Twin-Turbo V8 Gas
Engine
3.0L Twin-Turbo Flat 6 Gas
Transmission
6-Speed Automatic
Transmission
7-Speed Automatic
Transmission
8-Speed Automatic
Drivetrain
All-Wheel Drive
Drivetrain
Rear-Wheel Drive
Drivetrain
All-Wheel Drive
Fuel Economy
N/A
Fuel Economy
City: 15 MPG
Hwy: 20 MPG
Fuel Economy
City: 18 MPG
Hwy: 24 MPG
Fuel Tank Capacity
11.1 gallons
Fuel Tank Capacity
19.8 gallons
Fuel Tank Capacity
17.6 gallons
Range
18 miles
Range
N/A
Range
N/A
Seating Capacity
2 seater
Seating Capacity
2 seater
Seating Capacity
4 seater
Trunk Volume
3.1 ft³
Trunk Volume
5.8 ft³
Trunk Volume
N/A

Photos

38
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28
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63
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Performance Specs

Engine and Transmission

Engine
1.5L Turbo Inline-3 Plug-in Hybrid
4.0L Twin-Turbo V8 Gas
3.0L Twin-Turbo Flat 6 Gas
Horsepower
369 hp @ 5800 rpm
523 hp @ 5500 rpm
379 hp @ 6500 rpm
Torque
420 lb-ft
494 lb-ft @ 2100 rpm
331 lb-ft @ 1950 rpm
Transmission
6-Speed Automatic
7-Speed Automatic
8-Speed Automatic
Drivetrain
All-Wheel Drive
Rear-Wheel Drive
All-Wheel Drive

Weight and Towing

Curb Weight
3,671 lbs
3,763 lbs
3,658 lbs

Fuel and MPG

Fuel Economy

Combined
27 MPG
17 MPG
20 MPG
City
N/A
15 MPG
18 MPG
Highway
N/A
20 MPG
24 MPG

Emissions

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

Fuel Tank

Fuel Tank Capacity
11.1 gallons
19.8 gallons
17.6 gallons
Cruising Range City
N/A
297 miles
316.8 miles
Cruising Range Highway
N/A
396 miles
422.4 miles

Battery Range & Charge Times

Range
18 miles
N/A
N/A
Battery Size
11.6 kWh
N/A
N/A
Charge Time
3 Hrs Charge Time @ 220/240V
N/A
N/A

Dimensions and Measurement

Exterior Dimensions

Length
184.9 in
179 in
177.9 in
Height
50.7 in
49.6 in
51.1 in
Max Width
76.5 in
76.3 in
72.9 in
Front Width
64.7 in
66.3 in
62.7 in
Rear Width
67.8 in
65 in
61.2 in
Wheelbase
110.2 in
103.5 in
96.5 in

Interior Space

Seating Capacity
2 seater
2 seater
4 seater
Front Seat Leg Room
43.1 in
N/A
N/A
Front Seat Headroom
38.7 in
38 in
N/A
Front Seat Shoulder Room
56.7 in
58.4 in
N/A

Cargo Space

Trunk Volume
3.1 ft³
5.8 ft³
N/A

Wheels and Suspension

Steering

Steering Type
Rack-Pinion
Rack-Pinion
Rack-Pinion
Turning Diameter
40.4 ft
41 ft
36.8 ft

Wheels

Wheels Type
Aluminum Wheels
Aluminum Wheels
Aluminum Wheels
Front Wheel Size
20" x 7.5"
19" x 9"
19" x 8.5"
Rear Wheel Size
20" x 8.5"
19" x 11"
20" x 11.5"

Suspension

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

Tires

Front Tire
P215/45YR20
P255/35ZR19
P235/40YR19
Rear Tire
P245/40YR20
P295/30ZR19
P295/35YR20

Colors and Materials

Standard Exterior Colors

  • E-Copper Metallic w/Frozen Grey Accent
  • Sophisto Gray Metallic w/BMW i Frozen Blue Accent
  • Sophisto Gray Metallic w/Frozen Gray Accent
  • Special Order Color
  • Black
  • Cirrus Silver Metallic
  • 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
  • Obsidian Black Metallic
  • Selenite Grey Metallic
  • designo Diamond White
  • designo Brilliant Blue Magno
  • designo Graphite Grey Magno
  • designo Selenite Grey Magno
  • Agate Grey Metallic
  • Aventurine Green Metallic
  • Carrara White Metallic
  • Dolomite Silver Metallic
  • Gentian Blue Metallic
  • GT Silver Metallic
  • Jet Black Metallic
  • Night Blue Metallic
  • Carmine Red
  • Chalk
  • Lava Orange
  • Python Green
  • Shark Blue
  • Custom Color

Standard Interior Materials

  • E-Copper Exclusive, Natural Leather/Cloth Upholstery
  • Giga Amido, Full Perforated Leather Upholstery
  • Giga Ivory White/Black, Full Perforated Leather Upholstery
  • Tera Dalbergia Brown, Natural Leather/Cloth Upholstery
  • Black w/Diamond Stitching, Exclusive Nappa Leather Upholstery
  • Black, MB-Tex/DINAMICA Upholstery
  • Atacama Beige/Black, Leather Seat Trim w/Two-Tone Heritage Design Interior
  • Black, Exclusive Manufaktur Lthr Seat Trim w/Two-Tone Interior
  • Black, Leather Seat Trim
  • Black, Leather Seat Trim
  • Black, Leather Seat Trim w/Heritage Design Interior
  • Bordeaux Red, Exclusive Manufaktur Lthr Seat Trim w/Two-Tone Interior
  • Graphite Blue, Exclusive Manufaktur Lthr Seat Trim w/Two-Tone Interior
  • Slate Grey, Exclusive Manufaktur Lthr Seat Trim w/Two-Tone Interior
  • Slate Grey, Leather Seat Trim
  • Slate Grey, Leather Seat Trim

Optional Interior Materials

N/A
  • Auburn Brown, Nappa Leather Upholstery
  • Black, Nappa Leather Upholstery
  • Red Pepper/Black, Nappa Leather Upholstery
  • Silver Pearl/Black, Nappa Leather Upholstery
  • Mojave Beige/Black, Leather Seat Trim w/Two-Tone Interior
  • Mojave Beige/Black, Leather Seat Trim w/Two-Tone Interior
  • Black, Leather Seat Trim w/Leather Package
  • Slate Grey, Leather Seat Trim w/Leather Package
  • Black, Leather Seat Trim w/Leather Interior
  • Black, Leather Seat Trim w/Sport-Tex Centers
  • Black, Lthr Seat Trim w/Lthr Interior & Chalk Stitching
  • Black, Lthr Seat Trim w/Sport-Tex Centers & Chalk Stitching
  • Bordeaux Red, Leather Seat Trim w/Leather Interior
  • Bordeaux Red, Lthr Seat Trim w/Lthr Interior & Chalk Stitching
  • Graphite Blue, Leather Seat Trim w/Leather Interior
  • Graphite Blue, Lthr Seat Trim w/Lthr Interior & Chalk Stitching
  • Slate Grey, Leather Seat Trim w/Leather Interior
  • Slate Grey, Lthr Seat Trim w/Lthr Interior & Chalk Stitching
  • Bordeaux Red/Black, Leather Seat Trim w/Two-Tone Leather Interior
  • Chalk/Slate Grey, Leather Seat Trim w/Two-Tone Leather Interior
  • Iceland Green/Black, Leather Seat Trim w/Two-Tone Leather Interior
  • Mojave Beige/Black, Leather Seat Trim w/Two-Tone Leather Interior
  • Agave Green, Club Leather Seat Trim
  • Agave Green, Club Leather Seat Trim w/Chalk Stitching
  • Truffle Brown, Club Leather Seat Trim
  • Truffle Brown, Club Leather Seat Trim w/Chalk Stitching

Features and Options

Infotainment

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

Interior Trim

Bucket Seats
Standard
Standard
Standard
Cloth Seats
Standard
Optional
Standard
Leather Seats
Standard
Optional
Standard
Leather Steering Wheel
Standard
Standard
Standard
Premium Synthetic Seats
Standard
Standard
Standard
Vinyl Seats
Standard
Optional
Standard
Woodgrain Interior Trim
Not Available
Not Available
Optional

Comfort

Head-Up Display
Standard
Not Available
Not Available
Navigation System
Standard
Standard
Standard
Steering Wheel Audio Controls
Standard
Standard
Standard
Power Mirror(s)
Standard
Standard
Standard
A/C
Standard
Standard
Standard
Adaptive Cruise Control
Not Available
Optional
Optional
Automatic Parking
Not Available
Standard
Not Available
Climate Control
Standard
Standard
Standard
Cooled Front Seat(s)
Not Available
Optional
Optional
Cruise Control
Standard
Standard
Standard
Hands-Free Liftgate
Not Available
Optional
Not Available
Heated Front Seat(s)
Standard
Standard
Standard
Heated Steering Wheel
Not Available
Not Available
Optional
Keyless Entry
Standard
Standard
Standard
Multi-Zone A/C
Standard
Standard
Standard
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
Optional
Standard
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
Optional
Lane Departure Warning
Standard
Optional
Optional
Lane Keeping Assist
Not Available
Optional
Optional
ABS
Standard
Standard
Standard
Night Vision
Not Available
Not Available
Optional
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
Not Available
Standard
Standard
Front Side Air Bag
Standard
Standard
Standard
Knee Air Bag
Standard
Standard
Not Available
Passenger Air Bag
Standard
Standard
Standard

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
1 Years / 10,000 Miles
Roadside Assistance
4 Years / Unlimited Miles
4 Years / 50,000 Miles
4 Years / 50,000 Miles
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