2021 BMW M340i

MSRP $54,700 - $56,700

Ranked #13 in Midsize Sedan

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2021 BMW M340i Price, Review, Ratings and Pictures

Updated on: December 28, 2021

Nathan Dyer's image
Nathan Dyer 

Senior Editor


If you fancy an entry-level ‘M’ sedan from BMW but don’t have the budget for the famed M3, don’t worry as BMW has just the right sedan for you, and it’s the 2021 BMW M340i. The M340i happens to be placed right between the 330i and the M3 in the 3 Series lineup. The M340i manages to bridge the gap between the softer 330i and the aggressive M3, and hence it might be the perfect compact sedan for the road as it gives you the comfort and practicality factor of the 330i while offering an exciting and dynamic driving experience that resembles an M3.

More from 2021 BMW M340i

2021 BMW M340i Exclusive Interior and Exterior Pictures | View latest Pictures

See detailed review »

Pros

Refined engine

Agile handling

Roomy cabin

Cons

Interior design is not distinguishable from the base 3 Series

Vague steering feedback

What's New?

Ambient lighting and a 48-volt mild-hybrid system are now available

Android Auto is now standard


See all »

Features

vehicle bio

base price

$54700

bodystyle

4dr Sedan

passenger capacity

5

top speed

155 mph

drivetrain

rear wheel drive

engine type

displacement

183 cu.in.

horsepower

382 hp @ 5800 rpm

torque

475 lb.-ft.. @ 4100 rpm

transmission

8 speed shiftable automatic

chassis

suspension front

Independent front strut suspension w/anti-roll bar

brake rotors (f/r)

13.7/13.6 in.

dimensions

wheelbase

112.2 in.

length

185.7 in.

width

71.9 in.

height

56.4 in.

curb weight

3849 lbs.

ground clearance

5.4 in.

capacity

cargo volume

17 cu ft.

payload capacity

860 lbs.

performance

zero to 60 mph

4.1 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


Trims

Base$54,700 onwards

  • 12.3-inch digital instrument cluster
  • Apple CarPlay and Android Auto Compatibility
  • Hands-Free Bluetooth
  • Leather seating
  • Sensatec Upholstery
  • Usb audio connection

Colors and Styles

2021 BMW M340i in Alpine White 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

8.0

Engine and Performance

8.0

Fuel Economy

6.0

Interior

9.0

Exterior

7.5

Safety

9.0

Competition

6.0

7.6

OVERALL RATING

Expert Review, Pricing Analysis and Buying Guide

7.6

Overall Rating


The M340i comes in both RWD and the obvious xDrive AWD drivetrain configuration. These are the only major options that you need to choose as the M340i doesn’t have any other trim level related to it and comes in a single trim configuration. Prices for the M340i start at $55,695 for the RWD version, and opting for the xDrive variant might cost you an extra couple thousand dollars. It competes with the 2021 Audi S4, the 2021 Mercedes-AMG C43 Sedan, and the 2021 INFINITI Q50 Red Sport 400.

2021 BMW M340i Sedan front angle view
2021 BMW M340i Sedan rear angle view

8.0/10
Engine and Performance

6.0/10
Fuel Economy

9.0/10
Interior

7.5/10
Exterior

9.0/10
Safety

6.0/10
Competition


2021 BMW M340i Features

The M340i only comes in a single trim level and prices start at $55,695. The M340i is available in both RWD and the xDrive AWD drivetrain configurations. It comes with a plethora of standard features whether it be in the exterior bodywork, interior, infotainment, or safety aids, and adds a lot of value to the money you spend on it along with options offered by BMW.

Trim

M340i

MSRP (RWD)

$55,695

MSRP (AWD)

$57,695

Key Features

10.25-inch touchscreen display

 

8-speaker sound system

 

M Sport brakes

 

14-way power-adjustable front sport seats

 

Leatherette dash trim

 

Hands-free trunk release

Which Trim should you buy?

The xDrive drivetrain should be on the spec sheet when you order your M340i as it brings in a lot of difference to the drive and makes the handling more agile and potent. The M340i, just like any other BMW, does come with a long list of optional extras, but even the standard spec is a handful for a car of its caliber.

2021 BMW M340i Engine and Performance

8.0/10

The 2021 BMW M340i comes powered by a 3-liter turbocharged inline-6 engine that produces 382 horsepower and 369 lb-ft of torque. It delivers its power in the best way for the road as it has most of its torque down low in the rev range that makes it easy to overtake on the highways and have fun on the twisties without much stress on the powertrain. The engine comes mated to an 8-speed automatic ZF transmission that performs as per the drive mode selected. As far as drivetrain configurations go, the M340i comes in a standard RWD drivetrain as well as an optional xDrive drivetrain configuration.

 2021 BMW M340i Sedan driving view

Speaking of drive modes, the M340i comes with four drive modes, namely Comfort, Economy, Adaptive, and Sport, and you can avail yourself of a fifth drive mode named the Sport Plus mode by pressing the Sport button twice. These drive modes make it easy for the M340i to adapt to your driving style and the driving conditions and helps get the best performance and efficiency for you. The M340i goes from 0-60 mph in 4.4 seconds and can cover a quarter-mile distance in 12.3 seconds from a standstill, which is really impressive for a premium sedan. It has a restricted top speed of 155 mph.

Models

2021 BMW M340i

2021 Audi S4

2021 Mercedes-AMG C43 Sedan

2021 INFINITI Q50 Red Sport 400

MSRP

$55,695

$50,945

$57,550

$51,995

Engine

3.0L, Turbocharged Inline-6

3.0L, Turbocharged V6

3.0L, Turbocharged V6

3.0L, Turbocharged V6

Drivetrain

RWD

AWD

AWD

RWD

Transmission

8-speed automatic

8-speed automatic

9-speed automatic

7-speed automatic

Power

382 hp @ 5,000 rpm

349 hp @ 6,300 rpm

385 hp @ 6,100 rpm

400 hp @ 6,400 rpm

Torque

369 lb-ft @ 1,600 rpm

369 lb-ft @ 3,200 rpm

384 lb-ft @ 2,500 rpm

350 lb-ft @ 1,600 rpm

0-60 MPH (sec)

4.4

4.1

4.3

4.5

Quarter-Mile (sec)

12.3

12.2

12.3

13

Top-Speed (MPH)

155

155

155

155

All the sedans in the segment offer similar performance figures, and the M340i is the only car in the segment with an inline-6 engine while the rivals come with a V6. The INFINITI Q50 Red Sport 400 might have the highest power figure in the segment, but the lower torque doesn’t help it to accelerate quicker than the rest of the cars. The Audi S4 is the quickest off the mark and yet is the most affordable prospect amongst these cars. The Mercedes-AMG C43 is just a hair length behind the Audi but costs considerably more. 

How well does the 2021 BMW M340i handle?

Part of the reason why people opt for the M340i is the fact that it handles better than the 330i on the road and offers driving dynamics similar to that of the M3. The sports-tuned suspension and the powertrain unit along with the electro-mechanical limited-slip differential make sure that the M340i behaves exactly how you want it to. 

 2021 BMW M340i Sedan handling

There is absolutely minimum body roll from the chassis’ part, and the M340i is blissful to handle through corners. However, the steering wheel doesn’t seem to offer much feedback and feel from the road, and that is an attribute that BMW needs to work on to improve the handling even more. Although it isn’t completely dead in any way, improving it could make a whole lot of difference in the overall driving experience. 

Braking Performance

The M340i has the right amount of braking power that helps it handle and stop in a way that it is expected to do. The front brake rotors are 13.7-inch in diameter, while the rear ones are 13.6-inch ones. These brakes along with the safety aids such as ABS and the clever traction control system manage to stop the M340i from 60 mph to a standstill in a braking distance of just 111 ft, which is impressive considering the fact that it weighs around 3,800 lbs mark.

Models

2021 BMW M340i

2021 Audi S4

2021 Mercedes-AMG C43 Sedan

2021 INFINITI Q50 Red Sport 400

Brake Rotors: Front (in)

13.7

13.8

14.2

14.0

Brake Rotors: Rear (in)

13.6

13.0

12.6

13.8

Curb Weight (lbs)

3,849

3,847

3,836

3,840

60-0 (feet)

111

113

110

110

The brakes on the M340i are not the biggest or smallest ones in the segment, but they seem to provide an adequate amount of feel and feedback which further add to the driver’s confidence. The Mercedes-AMG C43 seems to have the best stopping distance in the segment due to the large front brake rotors. The Q50 Red Sport 400 matches the stopping distance of the C43, while the Audi S4 travels the farthest. 

2021 BMW M340i Fuel Economy

6.0/10

The fuel economy is surprisingly great in the M340i as it delivers a combined fuel economy of 26 MPG while offering 23 and 32 MPG in the city and highway driving conditions, which are the best economy figures in its segment. Thanks to the turbocharged inline-6 along with the clever economy drive mode which helps save a lot of fuel, especially on the highways, and this is the reason why the M340i attracts a lot of customers. The 15.6-gallon fuel tank capacity does help the BMW M340i offer a driving range of around 400 miles on a single tank of gas, which is pretty impressive. 

Models

2021 BMW M340i

2021 Audi S4

2021 Mercedes-AMG C43 Sedan

2021 INFINITI Q50 Red Sport 400

MPG (City)

23

20

18

20

MPG (Highway)

32

28

27

26

MPG (Combined)

26

23

21

22

Fuel Capacity (gal)

15.6

15.3

17.4

20

Range (City / Highway / Combined) (miles)

359 / 500 / 406

306 / 428 / 352

313 / 470 / 365

400 / 520 / 440

The M340i certainly could have had a bigger fuel tank to complement its impressive fuel economy figures and offer a better fuel range. The INFINITI Q50, despite its lower fuel economy figures, manages to offer a better fuel range just because of its larger tank capacity of 20 gallons. The more powerful C43 is the least efficient, as expected, and hence employs a larger gas tank, while the Audi S4 returns a better fuel economy than the Infiniti but struggles in terms of driving range. 

2021 BMW M340i Interior

9.0/10

The interior design layout of the 2021 M340i is no different than a standard 330i, but the components and creature comforts offered are much more premium and instantly appeal to a majority of potential customers. The dashboard gets the new generation BMW design treatment with a sleek and subtle design layout and a minimalistic approach when it comes to buttons. The metal trim inserts along with the dual-tone leather-upholstered surface add elegance to the overall interior feel.

2021 BMW M340i basic Sedan cockpit area

The front bucket seats are leather-upholstered 14-way power-adjustable seats that offer best-in-class comfort and confidence. The power lumbar support adds to the confidence of the driver at tight corners. Also, features like the dual-zone automatic climate control, cruise control buttons on the steering wheel, and the armrest on the center console add to the comfort and convenience of the driver and passenger in the front row.

2021 BMW M340i basic Sedan front seats

Models

2021 BMW M340i

2021 Audi S4

2021 Mercedes-AMG C43 Sedan

2021 INFINITI Q50 Red Sport 400

Seating Capacity

5

5

5

5

Front Row (Head / Shoulder / Leg) (in)

38.7 / 56.0 / 42.0

37.3 / 55.9 / 41.3

37.9 / 55.3 / 41.7

39.5 / 56.7 / 44.5

Second Row (Head / Shoulder / Leg) (in)

37.6 / 54.6 / 35.2

37.4 / 54.5 / 35.7

37.1 / 55.0 / 35.2

36.8 / 56.1 / 35.1

Trunk Capacity (cu-ft)

17.0

12.0

12.6

13.5

The 40-20-40 split-bench seat in the second row comes with leather upholstery and adds elegance and comfort. The second row also gets small storage spaces, an armrest, as well as rear HVAC ducts for the comfort and convenience of the passengers. The M340i comes with the largest trunk capacity in its segment at 17 cubic feet. Features like the remote cargo access and the wide cargo entry help make loading and unloading cargo an easy task.

Along with the cargo capacity, the M340i has the best proportions in the segment with respect to cabin space for both the front and rear row of seats. The INFINITI Q50 does offer much more spacious front seats compared to other cars in the segment, but its second row doesn’t feel as comfortable as the one in M340i. It also offers a boot that is marginally better than the Audi and Mercedes sedans. Some of the notable interior features are:

  • Tilt & telescopic multi-function steering wheel
  • Aluminum accents on dash and door trim
  • Leatherette upholstery
  • 14-way power front seats with power lumbar support
  • Interior ambient lighting
  • Dual-zone automatic climate control unit

What’s there to keep you entertained?

BMWs never disappoint you when it comes to their infotainment systems, and the M340i is no exception. It comes with the latest iDrive 7 infotainment system along with a 10.25-inch infotainment touchscreen display unit on the dashboard that has voice command activation and gesture controls as well. The driver’s display is a single 12.3-inch TFT display that shows a wide range of vehicle information. 

The standard audio system is an 8-speaker sound unit, and you can also opt for a larger Harman/Kardon 16-speaker surround-sound unit for better audio quality. Features like SiriusXM satellite radio and satellite navigation are available as usual. As far as connectivity features go, the M340i gets Bluetooth audio and phone connectivity, Apple CarPlay, and Android Auto as standard. A 4G WiFi internet access hotspot feature is also available. Some of the notable infotainment features are:

  • SiriusXM satellite radio
  • 4G internet access WiFi hotspot
  • 10.25-inch touchscreen infotainment screen 
  • Apple CarPlay and Android Auto compatibility
  • 16-speaker Harman/Kardon surround sound system
  • Bluetooth phone and audio connectivity
  • 12.3-inch TFT driver’s display unit

2021 BMW M340i Exterior

7.5/10

The 2021 BMW M340i is undoubtedly the best-looking sedan in its segment. Its sharp headlights, blacked-out exterior features, subtle yet strong side profile, and the rear fascia with the sharp LED tail lamps and bumper portray the M340i’s true character and feel. The wheels available as standard are 18-inch double-spoke ‘M’ wheels, and you can always get the 19-inch set as an optional extra. The headlamps are projector LED headlamps with directional sensing and cornering assist features. The sharp LED daytime running lights and the LED tail lamps add to the M340i’s powerful character as well. 

 2021 BMW M340i Sedan 

Models

2021 BMW M340i

2021 Audi S4

2021 Mercedes-AMG C43 Sedan

2021 INFINITI Q50 Red Sport 400

Curb Weight (lbs)

3,849

3,847

3,836

3,840

Length (in)

185.7

187.5

185.0

189.6

Width (in)

71.9

72.7 

71.3

71.8

Height (in)

56.4

56.2

56.3

56.8

Ground Clearance (in)

3.5

4.5

3.5

5.2

Wheelbase (in)

112.2

111.0

111.8

112.2

The Audi S4 is marginally larger in dimensions than the BMW, while the Infiniti Q50 is much longer than its peers. That being said, there is hardly any difference in terms of the weights of all these cars, and all of them weigh around the 3,800 lbs mark. Both the Bimmer and Mercedes have a low hunkered down stance, which limits ground clearance to a great extent. The S4 rides an inch higher than them, while the Q50 Red Sport 400 has the highest ground clearance on offer. Some of the notable exterior features are:

  • LED headlamps 
  • LED DRLs
  • LED tail lights
  • Power-folding mirrors
  • Dual integrated exhaust tips
  • Black grille with grey surrounds
  • 18-inch double-spoke ‘M’ wheels 
  • Rear spoiler lip

2021 BMW M340i Safety

9.0/10

The 2021 BMW M340i hasn’t been crash-tested by agencies like the NHTSA or the IIHS so far, but as a BMW car, it assures to be one of the safest options in its class. Its chassis integrity and safety quotient need no mention as BMW has always delivered the best thanks to its engineering and manufacturing prowess. As standard safety features, the M340i gets an impressive list of features that include Tire Pressure Monitoring System, Lane Departure Warning, Lane Keep Assist, Pre-Collision Warning, and side-impact beams that ensure the occupants are safe and secure all the time. Some of the notable safety features are:

  • Tire Pressure Monitoring System
  • Pre-collision Warning
  • Lane Departure Warning
  • Lane Keep Assist
  • Side impact beams

2021 BMW M340i Competition

6.0/10

2021 BMW M340i vs. 2021 Audi S4

The Audi S4 is the cheapest option in the segment and brings along a good amount of features and practicality alongside. The BMW M340i offers a better driving experience and brings along better fuel economy when compared to the S4, while the Audi is said to have a better infotainment system but not so easy to use as the one in BMW. Here, BMW takes the upper hand between the two.

2021 Audi S4

2021 BMW M340i vs. 2021 Mercedes-AMG C43 Sedan

The Mercedes-AMG C43 Sedan is the closest rival to the M340i in terms of performance, practicality, and features. However, the M340i still proves to have better driving dynamics and more cargo capacity, hence is a more practical and exciting option to go for in comparison between the two. The more expensive nature of Mercedes further makes the BMW a better deal between the two.

2021 Mercedes-AMG C43 Sedan

2021 BMW M340i vs. 2021 INFINITI Q50 Red Sport 400

The INFINITI Q50 Red Sport 400 might be cheaper than the M340i, but the M340i definitely has better ride quality and features compared to the INFINITI. In comparison, the Q50 Red Sport 400 doesn’t seem to have a good second-row space and cargo capacity and is on the lower side when it comes to the safety and reliability quotient.

2021 INFINITI Q50 Red Sport 400

 

2021 BMW M340i Final Verdict

The 2021 BMW M340i is a car that gives you the best of both comfort and performance. It is the perfect sedan for those who wish to have a performance sedan but are not too keen on going for the BMW M3. The M340i not only delivers the best performance and handling in its segment, but also offers the best fuel economy, practicality, and usability. All in all, it seems to be the perfect daily driver that can also carry the family along while catering to your performance needs right when you need them.

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