The Comparative Analysis :

BMW 420d Convertible Steptronic (14 - 15) vs. BMW M4 Convertible Competition M DKG (17 - 18)

€ 48,500
BMW 420d Convertible Steptronic (14 - 15) 420d Cabrio
€ 95,800
 BMW M4 Convertible Competition M DKG (17 - 18) M4 Convertible Competition Package
€ 48,500
Base Price ⓘBase price of a new vehicle with standard equipment in Germany at market launch.
€ 95,800

ⓘBase price of a new vehicle with standard equipment in Germany at market launch. Price Info

Vehicle Dimensions

The 420d Cabrio is a little smaller in every dimension. It's 1.3 inches shorter, 1.8 inches narrower and 0.3 inches lower than the M4 Convertible Competition Package.
420d Cabrio
M4 Convertible Competition Package
54.5
Blueprint BMW 420d Convertible Steptronic (14 - 15)
71.9
79.4
54.8
Blueprint BMW M4 Convertible Competition M DKG (17 - 18)
73.6
79.3
71.9 in
Width
73.6 in
79.4 in
Width Incl. Mirrors
79.3 in
54.5 in
Height
54.8 in
Blueprint BMW 420d Convertible Steptronic (14 - 15)
110.6
182.6
Blueprint BMW M4 Convertible Competition M DKG (17 - 18)
110.7
183.9
182.6 in
Length
183.9 in
110.6 in
Wheelbase
110.7 in

Vehicle Weight

420d Cabrio
M4 Convertible Competition Package
3869 lb
Curb Weight
4112 lb
4762 lb
Gross Vehicle
Weight
4960 lb
BMW 420d Convertible Steptronic (14 - 15)
Weight Difference:
243 lb
5.91 %
BMW M4 Convertible Competition M DKG (17 - 18)

General

420d Cabrio
M4 Convertible Competition Package
F33
Generation
F83
Convertible
Car Body Style
Convertible
Diesel
Fuel Type
Premium Unleaded
Rear-wheel drive
Drivetrain
Rear-wheel drive
8-speed automatic transmission
Transmission
7-speed dual clutch transmission

Engine

420d Cabrio
M4 Convertible Competition Package
Straight-four diesel engine with tur­bo­charger
Engine Type
Straight-six gasoline engine with two tur­bo­chargers (bi­turbo)
BMW N47
Engine Series
BMW S55
N47-D20
Engine Code
S55-B30
4
Valves
4
4
Cylinders
6
2 L / 98 cu in
Displacement
3 L / 147 cu in
181 hp
at 4000 rpm
Power
444 hp
at 7000 rpm
420d Cabrio
181 hp
444 hp
M4 Convertible Competition Package
280 lb‑ft
at 1750 rpm
Max. Torque
406 lb‑ft
at 1850 rpm
420d Cabrio
280 lb‑ft
406 lb‑ft
M4 Convertible Competition Package

Performance

420d Cabrio
M4 Convertible Competition Package
142 mph
Maximum Speed
155 mph
8.2 sec
Acceleration 0 to 62 mph
4.3 sec
62 mph 62
mph

374 ft
0.000 sec

420d Cabrio

62 mph 62
mph

197 ft
0.000 sec

M4 Convertible Competition Package

▶ REPLAY
21.38 lb/hp
Weight-to-Power Ratio
9.26 lb/hp
420d Cabrio
21.38 lb/hp
9.26 lb/hp
M4 Convertible Competition Package

Fuel Economy / Emissions

420d Cabrio
M4 Convertible Competition Package
Fuel Economy
49 mpg
combined
27 mpg
420d Cabrio
49 mpg
27 mpg
M4 Convertible Competition Package
41 mpg
city
20 mpg
No data
highway
No data
Kraftstoffanzeige
15.1 gal
Fuel Tank Capacity
15.9 gal
Kraftstoffanzeige
738 mi
Range
429 mi
420d Cabrio
738 mi
429 mi
M4 Convertible Competition Package
Environmental Impact
98.8 kWh
Total Energy Consumption
per 100 miles ⓘThe total energy consumption per 100 miles is the amount of energy consumed by a vehicle when burning fuel or using electricity per 100 miles (final energy), and the energy required to produce the appropriate amount of fuel or electricity (primary energy).
164.8 kWh
420d Cabrio
98.8 kWh
164.8 kWh
M4 Convertible Competition Package
Euro 6b (NEFZ)
Emission Standard
Euro 6b (NEFZ)
204 g/mi (NEFZ)
CO2 Emissions
327 g/mi (NEFZ)

Practical Convenience

420d Cabrio
M4 Convertible Competition Package
2
Doors
2
4
No. of Seats
4
893 lb
Maximum Payload
849 lb
10.5 cu ft
Trunk Volume
10.5 cu ft
No data
Cargo Volume (Seats Down)
No data