The Comparative Analysis :

BMW 420i Convertible Steptronic (14 - 16) vs. BMW M4 Convertible M DKG (14 - 17)

€ 46,100
BMW 420i Convertible Steptronic (14 - 16) 420i Cabrio
€ 83,600
 BMW M4 Convertible M DKG (14 - 17) M4 Cabrio
€ 46,100
Base Price ⓘBase price of a new vehicle with standard equipment in Germany at market launch.
€ 83,600

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

Vehicle Dimensions

The 420i Cabrio is a little smaller in every dimension. It's 1.3 inches shorter, 1.8 inches narrower and 0.1 inches lower than the M4 Cabrio.
420i Cabrio
M4 Cabrio
54.5
Blueprint BMW 420i Convertible Steptronic (14 - 16)
71.9
79.4
54.6
Blueprint BMW M4 Convertible M DKG (14 - 17)
73.6
79.3
71.9 in
Width
73.6 in
79.4 in
Width Incl. Mirrors
79.3 in
54.5 in
Height
54.6 in
Blueprint BMW 420i Convertible Steptronic (14 - 16)
110.6
182.6
Blueprint BMW M4 Convertible M DKG (14 - 17)
110.7
183.9
182.6 in
Length
183.9 in
110.6 in
Wheelbase
110.7 in

Vehicle Weight

420i Cabrio
M4 Cabrio
3858 lb
Curb Weight
4112 lb
4729 lb
Gross Vehicle
Weight
4960 lb
BMW 420i Convertible Steptronic (14 - 16)
Weight Difference:
254 lb
6.18 %
BMW M4 Convertible M DKG (14 - 17)

General

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

Engine

420i Cabrio
M4 Cabrio
Straight-four gasoline engine with tur­bo­charger
Engine Type
Straight-six gasoline engine with two tur­bo­chargers (bi­turbo)
BMW N20
Engine Series
BMW S55
N20-B20
Engine Code
S55-B30
4
Valves
4
4
Cylinders
6
2 L / 98 cu in
Displacement
3 L / 147 cu in
181 hp
at 5000 rpm
Power
425 hp
at 5500 rpm
420i Cabrio
181 hp
425 hp
M4 Cabrio
199 lb‑ft
at 1250 rpm
Max. Torque
406 lb‑ft
at 1850 rpm
420i Cabrio
199 lb‑ft
406 lb‑ft
M4 Cabrio

Performance

420i Cabrio
M4 Cabrio
143 mph
Maximum Speed
155 mph
8.3 sec
Acceleration 0 to 62 mph
4.4 sec
62 mph 62
mph

377 ft
0.000 sec

420i Cabrio

62 mph 62
mph

200 ft
0.000 sec

M4 Cabrio

▶ REPLAY
21.31 lb/hp
Weight-to-Power Ratio
9.68 lb/hp
420i Cabrio
21.31 lb/hp
9.68 lb/hp
M4 Cabrio

Fuel Economy / Emissions

420i Cabrio
M4 Cabrio
Fuel Economy
37 mpg
combined
27 mpg
420i Cabrio
37 mpg
27 mpg
M4 Cabrio
27 mpg
city
20 mpg
No data
highway
No data
Kraftstoffanzeige
15.9 gal
Fuel Tank Capacity
15.9 gal
Kraftstoffanzeige
583 mi
Range
429 mi
420i Cabrio
583 mi
429 mi
M4 Cabrio
Environmental Impact
121.2 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
420i Cabrio
121.2 kWh
164.8 kWh
M4 Cabrio
Euro 6b (NEFZ)
Emission Standard
Euro 6b (NEFZ)
240 g/mi (NEFZ)
CO2 Emissions
327 g/mi (NEFZ)

Practical Convenience

420i Cabrio
M4 Cabrio
2
Doors
2
4
No. of Seats
4
871 lb
Maximum Payload
849 lb
10.5 cu ft
Trunk Volume
10.5 cu ft
No data
Cargo Volume (Seats Down)
No data