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Compare BMW M4 Convertible vs Mercedes-Benz SL-Class vs Porsche 718 Boxster

BMW M4 Convertible
2020 BMW M4 Convertible
Select configuration:
$77,650
Starting Price (MSRP)
8.1
BMW M4 Convertible Full Review
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Mercedes-Benz SL-Class
2020 Mercedes-Benz SL-Class
Select configuration:
$91,000
Starting Price (MSRP)
8.0
Mercedes-Benz SL-Class Full Review
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Porsche 718 Boxster
2019 Porsche 718 Boxster
Select configuration:
$59,000
Starting Price (MSRP)
8.8
Porsche 718 Boxster Full Review
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Overview

Engine
3.0-liter Twin-Turbo Inline-6 Gas
Engine
3.0-liter Twin-Turbo V6 Gas
Engine
2.0-liter Turbo Flat 4 Gas
Transmission
6-Speed Manual
7-Speed Automatic (+$2,900)
Transmission
9-Speed Automatic
Transmission
6-Speed Manual
7-Speed Automatic (+$3,210)
Drivetrain
Rear Wheel Drive
Drivetrain
Rear Wheel Drive
Drivetrain
Rear Wheel Drive
Fuel Economy
City: 17 MPG
Hwy: 25 MPG
Fuel Economy
City: 20 MPG
Hwy: 28 MPG
Fuel Economy
City: 21 MPG
Hwy: 28 MPG
Fuel Tank Capacity
15.8 gallons
Fuel Tank Capacity
19.8 gallons
Fuel Tank Capacity
14.2 gallons
Seating Capacity
4 seater
Seating Capacity
2 seater
Seating Capacity
2 seater
Trunk Volume
7.8 ft³
Trunk Volume
8.5 ft³
Trunk Volume
9.7 ft³

Photos

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44
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Performance Specs

Engine and Transmission

Engine
3.0-liter Twin-Turbo Inline-6 Gas
3.0-liter Twin-Turbo V6 Gas
2.0-liter Turbo Flat 4 Gas
Horsepower
425 hp @ 5500 rpm
362 hp @ 5500 rpm
300 hp @ 6500 rpm
Torque
406 lb-ft @ 1850 rpm
369 lb-ft @ 2000 rpm
280 lb-ft @ 1950 rpm
Transmission
6-Speed Manual
7-Speed Automatic (+$2,900)
9-Speed Automatic
6-Speed Manual
7-Speed Automatic (+$3,210)
Drivetrain
Rear Wheel Drive
Rear Wheel Drive
Rear Wheel Drive

Steering

Steering Type
Rack-Pinion
Rack-Pinion
Rack-Pinion
Turning Diameter
40 ft
36.2 ft
36.1 ft

Wheels

Wheels Type
Aluminum Wheels
Aluminum Wheels
Aluminum Wheels
Front Wheel Size
18" x 9"
19" x 8.5"
18" x 8"
Rear Wheel Size
18" x 10"
19" x 9.5"
18" x 9.5"

Suspension

Front Suspension
Strut
Multi-Link
Strut
Rear Suspension
Multi-Link
Multi-Link
Strut

Tires

Front Tire
P255/40YR18
P255/35YR19
P235/45ZR18
Rear Tire
P275/40YR18
P285/30YR19
P265/45ZR18

Fuel and MPG

Fuel Economy

Combined
20 MPG
22 MPG
24 MPG
City
17 MPG
20 MPG
21 MPG
Highway
25 MPG
28 MPG
28 MPG

Emissions

CO2 Emissions @ 15K mi/year
8.8 Tons/yr
8.0 Tons/yr
7.3 Tons/yr

Fuel Tank

Fuel Tank Capacity
15.8 gallons
19.8 gallons
14.2 gallons
Cruising Range City
268.6 miles
396 miles
298.2 miles
Cruising Range Highway
395 miles
554.4 miles
397.6 miles

Dimensions and Measurement

Exterior Dimensions

Length
184.5 in
182.3 in
172.4 in
Height
54.6 in
51.2 in
50.4 in
Max Width
73.6 in
73.9 in
70.9 in
Front Width
62.2 in
62.8 in
59.6 in
Rear Width
63.1 in
63 in
60.3 in
Wheelbase
110.7 in
101.7 in
97.4 in
Ground Clearance
N/A
3.7 in
4.3 in

Interior Space

Seating Capacity
4 seater
2 seater
2 seater
Front Seat Leg Room
42.2 in
42.9 in
N/A
Front Seat Headroom
40.4 in
39.1 in
N/A
Front Seat Shoulder Room
55.3 in
55.5 in
N/A
Front Seat Hip Room
N/A
53.6 in
N/A
Rear Seat Leg Room
33.1 in
N/A
N/A
Rear Seat Headroom
37.1 in
N/A
N/A
Rear Seat Shoulder Room
49.8 in
N/A
N/A

Weight and Trailing

Curb Weight
4,110 lbs
3,826 lbs
2,944 lbs

Cargo Space

Trunk Volume
7.8 ft³
8.5 ft³
9.7 ft³

Colors and Materials

Standard Exterior Colors

Alpine White
  • Black
  • Brilliant Blue Metallic
  • Dolomite Brown Metallic
  • Graphite Grey Metallic
  • Iridium Silver Metallic
  • Obsidian Black Metallic
  • Polar White
  • Selenite Grey Metallic
  • Black
  • Guards Red
  • Racing Yellow
  • White

Optional Exterior Colors

  • Austin Yellow Metallic
  • Black Sapphire Metallic
  • Mineral Gray Metallic
  • Mineral White Metallic
  • Sakhir Orange II Metallic
  • San Marino Blue Metallic
  • Yas Marina Blue Metallic, Build Out:06/30/2019
  • Azurite Black Metallic, Priority 1. Build Out:05/31/2019
  • Champagne Quartz Metallic, Priority 1. Build Out:05/31/2019
  • Smoked Topaz Metallic, Priority 1
  • designo Cardinal Red Metallic
  • designo Diamond White Metallic
  • designo Selenite Grey Magno
  • Agate Grey Metallic
  • Carrara White Metallic
  • GT Silver Metallic
  • Jet Black Metallic
  • Night Blue Metallic
  • Carmine Red
  • Chalk
  • Lava Orange
  • Miami Blue
  • Custom Color Metallic
  • Custom Color

Standard Interior Materials

  • Black, Extended Merino Leather Upholstery
  • Sakhir Orange/Black, Extended Merino Leather Upholstery
  • Silverstone, Extended Merino Leather Upholstery
  • Bengal Red/Black, Leather Upholstery
  • Black, Leather Upholstery
  • Crystal Grey/Black, Leather Upholstery
  • Ginger Beige/Espresso, Leather Upholstery
  • Agate Grey, Leather Seat Trim
  • Agate Grey, Partial Leather Seat Trim
  • Black, Leather Seat Trim
  • Black, Partial Leather Seat Trim

Optional Interior Materials

  • Amaro Brown, Individual Extended Merino Leather Upholstery
  • Black, Full Merino Leather Upholstery
  • Cohiba Brown, Individual Extended Merino Leather Upholstery
  • Golden Brown, Individual Extended Merino Leather Upholstery
  • Nutmeg, Individual Extended Merino Leather Upholstery
  • Opal White, Individual Extended Merino Leather Upholstery
  • Sakhir Orange/Black, Full Merino Leather Upholstery
  • Silverstone, Full Merino Leather Upholstery
  • Bengal Red/Black, Nappa Leather Upholstery
  • Black, Nappa Leather Upholstery
  • Ginger Beige/Espresso, Nappa Leather Upholstery
  • Porcelain/Black, Nappa Leather Upholstery
  • Saddle Brown/Black, Nappa Leather Upholstery
  • Bengal Red/Black, Exclusive Nappa Leather Upholstery
  • Black, Exclusive Nappa Leather Upholstery
  • Ginger Beige/Espresso, Exclusive Nappa Leather Upholstery
  • Porcelain/Black, Exclusive Nappa Leather Upholstery
  • Saddle Brown/Black, Exclusive Nappa Leather Upholstery
  • Agate Grey, Partial Leather Seat Trim w/Leather Package
  • Black, Partial Leather Seat Trim w/Leather Package
  • Black/Bordeaux Red, Two-Tone Partial Leather Seat Trim w/Leather Pkg
  • Black/Chalk, Two-Tone Partial Leather Seat Trim w/Leather Pkg
  • Black/Luxor Beige, Two-Tone Partial Leather Seat Trim w/Leather Pkg
  • Agate Grey, Leather Seat Trim w/Leather Interior
  • Black, Leather Seat Trim w/Leather Interior
  • Black/Dark Silver, Lthr Seat Trim w/Sport-Tex Centers & Lthr Interior
  • Graphite Blue/Chalk, Lthr Seat Trim w/Sport-Tex Centers & Lthr Interior
  • Black/Bordeaux Red, Special Leather Seat Trim w/Leather Interior
  • Black/Chalk, Special Leather Seat Trim w/Leather Interior
  • Black/Luxor Beige, Special Leather Seat Trim w/Leather Interior
  • Bordeaux Red, Two-Tone Leather Seat Trim w/Leather Interior
  • Graphite Blue, Two-Tone Leather Seat Trim w/Leather Interior
  • Espresso, Natural Leather Seat Trim w/Leather Interior
  • Color to Sample, Color to Sample Leather Seat Trim
  • Espresso/Cognac, Two-Tone Natural Leather Seat Trim w/Leather Int

Features and Options

Infotainment

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

Interior Trim

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

Comfort

Head-Up Display
Optional
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
Optional
Automatic Parking
Optional
Optional
Not Available
Climate Control
Standard
Standard
Optional
Cooled Front Seat(s)
Not Available
Optional
Optional
Cruise Control
Standard
Standard
Standard
Hands-Free Liftgate
Not Available
Standard
Optional
Heated Front Seat(s)
Standard
Standard
Optional
Heated Steering Wheel
Optional
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 Engine Start
Not Available
Standard
Not Available
Remote Trunk Release
Not Available
Not Available
Optional
Seat Memory
Standard
Standard
Not Available
Universal Garage Door Opener
Standard
Standard
Standard
Seat-Massage
Not Available
Optional
Not Available
Keyless Start
Standard
Standard
Optional
Telematics
Standard
Standard
Not Available

Safety

Safety Features

Back-Up Camera
Standard
Standard
Standard
Rear Parking Aid
Standard
Not Available
Standard
Blind Spot Monitor
Optional
Optional
Optional
Lane Departure Warning
Standard
Optional
Not Available
Lane Keeping Assist
Standard
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
Not Available
Standard
Standard
Front Side Air Bag
Standard
Standard
Standard
Knee Air Bag
Standard
Standard
Standard
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
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