2021 BMW Z4 M40i Convertible

MSRP $63,700 | Check Best Price

Ranked #12 in Compact Convertibles

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2021 BMW Z4 M40i Convertible Price, Review, Ratings and Pictures

Updated on: February 25, 2021

T. Banerjee's image
T. Banerjee

Automotive Journalist


The all-new 2021 BMW Z4 sdrive M40i  is all set for the upcoming year with a more aggressive design and exterior front grille and everything in common with the else 2021 BMW Z4. However, the Z4 sdrive M40i is respected across the roadster segment for its unmatched power, excellent performance, premium features and robust build quality among all performance cars the BMW Z4 sdrive M40i convertible promises on delivering top notch quality and spec. 

The BMW Z4 sdrive M40i is expensive by around $13,000 from the BMW Z4 base model. The 2021 BMW Z4 sdrive M40i comes with a performance tuned 3.0L Twin Turbo Inline 6 engine that punches out a massive 382hp and 369 lb-ft. of torque and is known for making prowess and nimble performance. To know how the BMW Z4 sdrive M40i performs and feels when put against its competition the Porsche 718 Boxster Convertible, the Mercedes-Benz C300 and the Audi TT 2.0 TFSI Quattro, read out our detailed analysis.

See Detailed Review »

Pros

Nimble handling

Tech loaded drive assist features

More performance

Fastest among rivals

Cons

Useless cargo area

Too much Expensive than base version

Lacks manual transmission

AWD not available

What's New?

SiriusXM satellite radio and Android Auto integration

Optional wireless smartphone charging pad

Optional M Sport brakes with red-painted calipers


See all »

Features

vehicle bio

base price

$63700

bodystyle

2dr Convertible

passenger capacity

2

top speed

155 mph

drivetrain

rear wheel drive

engine type

displacement

183 cu.in.

horsepower

382 hp @ 5000 rpm

torque

369 lb.-ft.. @ 1600 rpm

transmission

8-speed Automatic w/overdrive and auto-manual

chassis

suspension front

Independent front strut suspension w/anti-roll bar

brake rotors (f/r)

14.6/13.6 in.

dimensions

wheelbase

97.2 in.

length

170.7 in.

width

73.4 in.

height

51.4 in.

curb weight

3457 lbs.

capacity

cargo volume

9.9 cu ft.

payload capacity

551 lbs.

performance

zero to 60 mph

5.2 sec.

zero to 100 mph

7.2 sec.

standing 1/4-mile

12.3 sec.

warranty

basic warranty

4 yr./ 50000 mi.

drivetrain warranty

4 yr./ 50000 mi.

corrosion warranty

12 yr./ unlimited mi.

roadside assistance

Yes


Pictures & Videos

Videos
2021 BMW Z4 M40i Convertible Review video
2021 BMW Z4 M40i Convertible Review video
2021 BMW Z4 M40i Convertible Safety video

Trims

Base $63,700 onwards

382 hp @ 5000 rpm | 3 L | Inline 6 | Premium unleaded

  • Active Driving Assistant
  • Apple Carplay Compatible
  • Driver Lumbar Support
  • Heated Exterior Mirrors
  • Wireless Charger

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Colors and Styles

2021 BMW Z4 M40i Convertible in Alpine White color 2021 BMW Z4 M40i Convertible in Black Sapphire Metallic color 2021 BMW Z4 M40i Convertible in Glacier Silver Metallic color 2021 BMW Z4 M40i Convertible in Mediterranean Blue Metallic color
Alpine White

Vehicle images are guides only and may not reflect the model's exact specifications/features– exact specifications/features should be confirmed with the seller.

Ratings

Pricing And Features

5.0

Engine And Performance

8.0

Fuel Economy

6.0

Interior

6.0

Exterior

8.0

6.5

OVERALL RATING

Expert Review, Pricing Analysis and Buying Guide

6.5

Overall Rating


The 2021 BMW Z4 sdrive M40i is BMW’s answer to the Porsche 718 Boxster and it surely gets its way ahead of the Porsche. This aggressive looking convertible coupe that is similarly aggressive to drive comes with a lot of good characteristics and offers a fuel efficient drive, while it also falls short of some features over its competitors. The 2021 BMW Z4 sdrive M40i is expensively priced at $63,700 and is a great choice for an sports and performance based roadster cum convertible coupe. 

2021 BMW Z4 M40i Convertible front three quarter view
2021 BMW Z4 M40i Convertible rear three quarter view

5.0/10
Pricing and Features

8.0/10
Engine and Performance

6.0/10
Fuel Economy

6.0/10
Interior

8.0/10
Exterior


2021 BMW Z4 M40i Convertible Pricing and Features

5.0/10

The 2020 BMW Z4 sdrive M40i convertible is available in two trims, namely the BMW Z4 sdrive M40i sdrive 30i and the BMW Z4 sdrive M40i sdrive m40i although the prices at which they are offered are drastically different. Here we are reviewing the 2021 BMW Z4 sdrive M40i which is the performance version. 

For a price hike of $13,000, the BMW Z4 sdriveM40i offers an excellent performance taking just 3.9 seconds on the track to cover 0-60MPH. The 2021 BMW Z4 sdrive M40i also similarly comes with a list of upgraded features just like the sdrive30i on the inside to make your journey comfortable and illustrious. Some key features are mentioned below. 

Trim

BMW Z4 sdrive M40i Sdrive M40i

MSRP (RWD)

$63,700 (est)

Key Features

Remote activated perimeter/approach lights

 

Locking fuel flap included with power door locks

 

Front seatbelt pretensioners

 

Independent rear multi-link suspension w/anti-roll bar

 

18" x 10" machined w/painted accents aluminum rear wheels

 

Power steering

 

Speed-sensing steering

2021 BMW Z4 M40i Convertible Maintenance, Reliability and Warranty

Though the BMW Z4 sdrive M40i could not make a revolutionary entry into the market, it did make a statement with its presence after remaining discontinued for a few years due to its homegrown name in making reliable and quality cars. The 2021 BMW Z4 sdrive M40i holds a lot of responsibility on its shoulder and will be backed by the reliability and quality of its previous generation model. The BMWs twin-turbo inline 6 engine ushers a quality and capable drive and offers the feeling of driving a roadster car.

The 2021 BMW Z4 sdrive M40i has not been rated yet by independent ratings agencies such as J.D.Power, IIHS and NHTSA among others. However, the previous model of the vehicle was recalled a few times and due to issues resulting from the reverse camera and the display. These recalls were generally made for software issues and no major hardware or parts were affected.

Ownership costs

Similar to the base version, the 2021 BMW Z4 sdrive M40i ownership cost will be updated on availability. However, just like other convertibles on the roads, the BMW Z4 sdrive M40i is an expensive vehicle to run and maintain over a period of time. Its sporty performance and agile ride and handling like a sports car does not cost you any extra fuel and is similarly affordable like the base Z4, 

However, the surprising part is that in spite of being a performance trim it costs you similar to the base Z4. The cost to own a BMW Z4 sdrive M40i for a period of 5 years, is totaled to around $72,900 You can take a look at the Z4 sdrive30i ownership table for drawing a close conclusion of the costs which you may incur while owning a 2021 BMW Z4 sdrive M40i Convertible for a 5 year period. As both of them cost you the same on maintenance, repairs and fuel expense.

2021 BMW Z4 sdrive M40i Warranty

The BMW Z4 sdrive M40i convertible remains one of the classic roadsters on the US roads. Like other BMW cars the Z4 is also crafted with great detail and tries to fulfill all the needs of the customer. The vehicle scores well in reliability and provides a class-leading comprehensive warranty which extends great value to customers post purchase. The Warranty policy included in the 2021 BMW Z4 sdrive M40i are following:

Warranty 

Time Period

Bumper-to-bumper warranty

4 years or 50,000 miles, whichever is first

Powertrain warranty

4 years or 50,000 miles, whichever is first

Emission control warranty

2 years or 24,000, whichever is first

Specific control devices

8 years or 80,000 miles, whichever is first

Rust and Perforation Warranty

12 years and unlimited warranty

The above warranty policies ensure post purchase confidence of buying a BMW Z4. All these warranty policies extend cover against any uncertain breakdown, manufacturing fault and serious malfunction arising from a part of the vehicle and free replacement of the parts within the warranty period from the BMW authorised service agencies.

Miles Per Dollar

The BMW Z4 sdrive M40i average cost of ownership for a year comes to $13,500, hence, this is the cost you will pay for driving a BMW Z4 sdrive M40i for a range equal to 1 year or 15,000 miles. However, on doing a breakdown we came to a conclusion that BMW Z4 sdrive M40i will come to 1 mile per dollar.

2021 BMW Z4 M40i Convertible Buying Advice

The 2021 BMW Z4 sdrive M40i is the performance tuned version of the BMW Z4 and comes with heavy additional features and gets access to the powerful 3.0 liter turbocharged six cylinder engine which boosts the power figures by a relatively higher margin. Well, this performance upgrade and additional features make the BMW Z4 sdrive M40i more expensive, however, if you want performance this is the one that can take things to new heights.

Is buying a used BMW Z4 sdrive M40i Convertible a good idea?

The BMW Z4 is expensive and buying a used BMW Z4 sdrive M40i is a good idea because that can save you a good amount of money, if you get hold of the right vehicle at the right price. Many Certified pre owned car dealerships across US have a good stock of the BMW Z4 sdrive M40i Convertible and offering great discounts. Check them out here before stocks end. 

However, if you have a vision of buying a brand new BMW Z4 sdrive M40i you will have to spend some extra cash and since the BMW Z4 sdrive M40i has not changed a lot after the generation upgrade a few years ago buying a 1 or 2 years old BMW Z4 sdrive M40i will be a great deal and save you a lot of money and you still get the latest features and design.

2021 BMW Z4 M40i Convertible Engine and Performance

8.0/10

The 2021 BMW Z4 sdrive M40i convertible comes with an upgraded Twin Turbo 3.0-liter six-cylinder in-line engine offering 382hp and 369 lb-ft. Of torque between 1600-4500rpm. The BMW Z4 sdrive M40i is known for its fast driving skills and exemplary power and handling. The performance of the all new BMW Z4 sdrive M40i convertible is expected to be better than the previous model. The suspension setup manages to handle the body roll quite firmly while cornering and also you can choose between adaptive air suspension or a stiff sports suspension. 

2021 BMW Z4 M40i Convertible has 3.0L inline-6 engine

The 2021 BMW Z4 sdrive M40i convertible also comes with improved aerodynamics and this one gets a 8 speed automatic transmission unit that is responsive and offers better efficiency to the powertrain. In order to reduce weight, BMW Z4 sdrive M40i convertible comes with a fabric roof which makes the car very lighter than before. The sporty ride quality is taken care of by the 19” inch wheels when you speed over uneven roads and sharp hairpin turns. 

Models

BMW Z4 sdrive M40i convertible

Porsche 718 Boxster convertible

Audi TT 2.0 TFSI Quattro

Mercedes-Benz C 300 Convertible

MSRP

$63,700

$59,000

$49,395

$52,845

Engine

3.0L Twin turbo Inline 6

2.0L H4 Intercooled Turbocharged Motor

2.0L TFSI Inline 4 Motor

2.0L, Turbocharged Inline-4 Motor

Drivetrain

RWD

RWD

FWD

RWD

Transmission

8 Speed Automatic

6-speed manual

7 Speed Automated Manual

9-speed automatic

Power (hp @ RPM

382@5500rpm

300 @6500

228 @5000

255 @5800

Torque (lb-ft @ RPM)

369@1850rpm

280 @1950

258 @1750

273 @1800

However, the 2021 BMW Z4 sdrive M40i convertible when compared to the performance of the Porsche 718 Boxster, Audi TT 2.0 TFSI convertible and the Mercedes-Benz C series beats them all with its straightaway fast and agile performance.

2021 BMW Z4 sdrive M40i ACCELERATION AND BRAKING PERFORMANCE

The 2021 BMW Z4 sdrive M40i convertible is straightway faster than all of its competitors, and why not the massive 3.0L Turbocharged inline 6 engine produces great low end torque for such tasks.

2021 BMW Z4 M40i Convertible accelerate 0-60 mph in 3.9 sec

The 2021 BMW Z4 sdrive M40i convertible reaches from 0-60 in just 3.9 seconds, and if you’re driving the car in sports mode plus, the transmission shows its smoothness as you swoosh from just over 60 mph to 100 mph In the blink of an eye. 

2021 BMW Z4 M40i Convertible  front/rear brake rotor

Models

BMW Z4 sdrive M40i convertible*

Porsche 718 Boxster convertible

Audi TT 2.0 TFSI Quattro

Mercedes-Benz C 300 Convertible

0-60 MPH (seconds)

3.9

4.9 

5.5

6.1

Quarter-Mile (seconds)

12.3

12.7

13.7

14.1

Top-Speed (MPH)

155

187

155

155

Engine

3.0L Inline 6 Turbocharged engine

2.0L H4 Intercooled Turbocharged Motor

2.0L TFSI Inline 4 Motor

2.0L, Turbocharged Inline-4 Motor

Braking 60-0 (feet)

113

112

115

153 (70-0)

*2020 acceleration figures used for reference purposes only

The 2021 BMW Z4 sdrive M40i convertible is fitted with Brembo brakes including 4 piston calipers and 13.7 inch ventilated rotors upfront. Also, the 2021 BMW Z4 sdrive M40i convertible comes with the full traction control which gives the driver and the passenger a better braking experience and more control over the car’s handling.

2021 BMW Z4 M40i Convertible Fuel Economy

6.0/10

Something that the 2021 BMW Z4 sdrive M40i is expected to do better is fuel economy. The 2021 BMW Z4 sdrive M40i gives an average MPG of 24 which is decent and better than what the rivals offer with a smaller engine and lesser power output.

Models

BMW Z4 sdrive M40i convertible

Porsche 718 Boxster convertible

Audi TT 2.0 TFSI Quattro

Mercedes-Benz C 300 Convertible

MPG (City)

24

21

23

21

MPG (Highway)

31

28

31

29

MPG (Combined)

26

24

26

24

Fuel Capacity (Gallons)

13.7

16.9

12.4

17.4

Range (City/Highway/Combined, in Miles)

343/438/NA

355/473/NA

334/450/NA

365/505/NA

It does beat its competition in fuel economy. Still, it could be better as the remodeling and redesigning are going on for the same.

2021 BMW Z4 M40i Convertible Interior

6.0/10

The 2021 BMW Z4 sdrive M40i convertible has a really stunning interior. With premium leather seats and fittings as a standard option, the 2021 BMW Z4 sdrive M40i convertible really feels luxurious. With an option of lining the central console with aluminum accents and also the gear stick, it looks really classy. With extended stitching and soft touch material all over the car it makes you want to sit in the all-new 2021 BMW Z4 sdrive M40i convertible.

2021 BMW Z4 M40i Convertible front seats

The interior comes with a two color style option. The interior of the car houses a lot of the top of the line technology. 

Models

BMW Z4 sdrive M40i convertible

Porsche 718 Boxster convertible

Audi TT 2.0 TFSI Quattro

Mercedes-Benz C 300 Convertible

Seating Capacity

2

2

2

4

Front Row (Headroom/Shoulder Room/Leg Room, in inches)

38.9/54.3/42.2

39.8/58.1/45.5

36.6/53.6/41.1

38.8/54.8/42.0

Rear Row (Headroom/Shoulder Room/Leg Room, in inches)

N/A

N/A

N/A

35.6/51.7/32.0

Trunk Capacity (cubic feet)

9.9

10(total)

12.0

12.6

Being a convertible does mean compromising with luggage space. Also the 2021 BMW Z4 sdrive M40i convertible is decently spacious and can easily accommodate a 6 footer because of the really low power adjusted seats.

2021 BMW Z4 sdrive M40i Infotainment features 

The 2021 BMW Z4 sdrive M40i comes with Apple CarPlay on its massive infotainment screen. The screen itself is pretty fast, advanced and interactive. With the virtual assistant that is provided by BMW, you can perform various tasks just by giving voice commands. The car comes with its own navigation system which is not as optimized as the Google maps but does get the job done. The vehicle comes with a premium 12 speaker Harman Kardon audio system which surrounds the car with its premium sound quality.

2021 BMW Z4 M40i Convertible infotainment screen

The car has a virtual driver assistance screen where the speedometers and the odometer as well as the fuel indicator is located. Also, there is a space between the screen for the navigation window. The only drawbacks of this virtual driver space are not very crisp and clear, also people may have a hard time adjusting to the counterclockwise moving speedometer. 

2021 BMW Z4 M40i Convertible screen
2021 BMW Z4 M40i Convertible instrument cluster
2021 BMW Z4 M40i Convertible front seats
2021 BMW Z4 M40i Convertible shift knob
2021 BMW Z4 M40i Convertible steering wheel

2021 BMW Z4 M40i Convertible Exterior

8.0/10

The 2021 BMW Z4 sdrive M40i convertible is a serious head-turner. If you’re looking to buy this vehicle you would have to get used to the attention you’ll get. The vehicle is facilitated with an aggressive exterior and premium interior.

2021 BMW Z4 M40i Convertible

Also, the soft convertible roof top adds to the aesthetic of the car. It is compact and serves its purpose in performance, luxury and design and is one of the most beautiful cars you’ll ever come across. 

Models

BMW Z4 sdrive M40i convertible

Porsche 718 Boxster convertible

Audi TT 2.0 TFSI Quattro

Mercedes-Benz C 300 Convertible

Curb Weight (lb)

3287

2944

3395

3894

Length (inches)

170.7

172.4

165.0

184.5

Width (inches)

73.4

70.9

72.1

71.3

Height (inches)

51.4

50.4

53.4

55.3

Ground Clearance (inches)

4.7

4.3

4.2

3.8

Wheelbase (inches)

97.2

97.4

98.6

111.8

The car stands apart amongst other convertibles and has a really sporty look that can attract buyers very easily.

2021 BMW Z4 M40i Convertible three quarter view
2021 BMW Z4 M40i Convertible left side view
2021 BMW Z4 M40i Convertible rear view
2021 BMW Z4 M40i Convertible rear view
2021 BMW Z4 M40i Convertible right side view

2021 BMW Z4 M40i Convertible Safety

Being low floored and having a very low center of gravity the 2021 BMW Z4 sdrive M40i convertible is very safe to drive on the road. This convertible has a smart roof closing wherein if someone comes in the way of its closing it’ll immediately retract. Also one of the cool features of this car is that the roof can be closed even at a speed of 30 mph which can help you even if it starts to rain suddenly. Some of the other safety features include:

  • Seat-mounted driver and passenger side-impact airbags
  • Electronic stability
  • Forward collision prevention system
  • Occupant sensing airbags
  • Traction control
  • Driver and passenger side airbag head extension
  • Power door locks with Locking fuel flap

2021 BMW Z4 M40i Convertible Competition

2021 BMW Z4 sdrive M40i Convertible Vs Audi TT 2.0 TFSI Quattro

The Audi TT 2.0 TFSI Quattro is a much more affordable and similarly capable vehicle. However, it is ranked quite low in terms of performance and power but provides better luxury, looks and design features.

Audi TT 2.0 TFSI Quattro

The Audi comes in at an exceptionally lesser price than the 2021 BMW Z4 sdrive M40i convertible but it lacks the joy and pleasure of driving a BMW.

2021 BMW Z4 sdrive M40i Convertible vs Porsche 718 Boxster convertible

The Porsche 718 Boxster convertible is undoubtedly fast, agile and gets the most perfect handling on the roads, it is a convertible that is best known for its sheer delivery of race car performance unmatched handling on corners, however in terms of performance and speed it cannot compete with the 2021 BMW Z4 sdrive M40i convertible.

Porsche 718 Boxster convertible

Although you have to pay extra for the Z4 sdriveM40i and we think that it is worth it.

2021 BMW Z4 M40i Convertible Final Verdict

Undoubtedly, the 2021 BMW Z4 sdrive M40i convertible is the best one out here in comparison to its segment rivals. However, it's simply more expensive than all the other and does not offer anything that is worth the price compared to the sdrive30i which is less expensive by a margin of $13,000 dollars. It equips the same luxury, comfort features and safety features but only replaces the powertrain with the 3.0L Inline 6 engine unit.

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