BMW2021 420d Convertible Specs

2021 (G23) BMW 420d Convertible Specs & Performance

2021 - 2024 (G23)

Tech Specs Summary


2 L Inline 4 Bi-Turbo MHEV

147 mph

7.6 seconds

187 hp

56 mpg

2 Doors

4 Seats

13.6 ft3
lb
3,913 lbs
Front - RWD

Performance

Performance
Top Speed
147 mph
0-62 mph
7.6 seconds
0-60 mph
7.4 seconds
Power-to-Weight
20.92 lb/hp
Combined Power
187 hp
Combined Torque
295 lb·ft

Gas Mileage

Gas Mileage
Combined
56 mpg
City
50 mpg
Highway
60.3 mpg
Total Range
873 Miles
Tailpipe CO2
179 g/Mile

Electric Powertrain - Mild Hybrid

Electric Powertrain - Mild Hybrid
Peak Power
11 hp
11 ps
Peak Output
8 kW
Battery Size
0.53 kWh

Diesel Engine - Mild Hybrid

Diesel Engine - Mild Hybrid
Capacity
2 Liter
121.7 in3
Layout
Inline 4
Aspiration
Bi-Turbo
Peak Power
187 hp @ 4,000 RPM
190 ps @ 4,000 RPM
Peak Torque
295 lb·ft @ 1,750 RPM
400 N·m @ 1,750 RPM
Valvetrain
DOHC
Valves/Cylinder
4 (16v Total)
Fuel Delivery
Common Rail
Position
Front Engine
Orientation
Longitudinal
Fuel
Diesel
Fuel Tank Capacity
15.6 Gallons

More Engine Specs

More Engine Specs
Engine Name
B47D20
Compression Ratio
16.5:1
Bore x Stroke
3.307 x 3.543 in
Bore-Stroke Ratio
0.93:1
Under-Square
Specific Output
1.54 hp/in3
Power/Cylinder
47 hp
Cylinder Volume
30.5 in3
BMEP
365.4 PSI
25.2 Bar

Drivetrain & Chassis

Drivetrain & Chassis
Driven Wheels
RWD
Rear-wheel Drive
Transmission (AT)
8 Speeds
Tyre Sizes
225/50R17 Y
Front Suspension
MacPherson Strut
Rear Suspension
Multi-Link
Front Brakes
Vented Disc
Rear Brakes
Vented Disc

Dimensions & Practicality

Dimensions & Practicality
Body
Medium Convertible
Door Count
2
Seat Count
4
Luggage Space
13.6 ft3
Turning Radius
37.4 ft
Curb Weight
3,913 lbs
Gross Weight
5,004 lbs
Maximum Payload
1,091 lbs
Towing Capacity
1,653-3,527 lbs
Length
187.7 in
Width
72.9 in
Height
54.5 in
Wheelbase
112.2 in
Front Track
62 in
Rear Track
63.4 in
★★★★★
★★★★★
3.1

Performance Rating2.1
Environment Rating2.2
Practicality Rating2.6

Pros & Cons vs Rivals

Performance
Environment
Practicality
Luggage
City Driving
Road Trips

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2021 BMW 420d Convertible Rankings

Best MPG Convertibles #30 / 1.8K
Best MPG Hybrid #41 / 900+
Best MPG BMWs #137 / 1.7K
Top HP/cu in BMWs #536 / 1.6K
Top lb·ft BMWs #646 / 1.7K
Fastest BMWs #806 / 1.7K
Fastest Convertibles #882 / 1.8K
Best 0-62 mph BMWs #1,011 / 1.7K
Top BHP BMWs #1,039 / 1.7K
Quickest 0-62 Convertibles #1,045 / 1.8K
Most Powerful Convertibles #1,074 / 1.8K
Top Power/Weight BMWs #1,288 / 1.7K
Best MPG #1,675 / 23K
Fastest #5,160 / 23K
Quickest 0-62 mph #6,648 / 23K
Most Powerful #7,989 / 23K
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