The Comparative Analysis :

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

€ 79,700
BMW M4 Convertible (14 - 17) M4 Cabrio
€ 46,900
 BMW 420i Convertible Steptronic (16 - 17) 420i Cabrio
€ 79,700
Base Price ⓘBase price of a new vehicle with standard equipment in Germany at market launch.
€ 46,900

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

Vehicle Dimensions

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

Vehicle Weight

M4 Cabrio
420i Cabrio
4023 lb
Curb Weight
3946 lb
4960 lb
Gross Vehicle
Weight
4817 lb
BMW M4 Convertible (14 - 17)
Weight Difference:
77 lb
1.91 %
BMW 420i Convertible Steptronic (16 - 17)

General

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

Engine

M4 Cabrio
420i Cabrio
Straight-six gasoline engine with two tur­bo­chargers (bi­turbo)
Engine Type
Straight-four gasoline engine with tur­bo­charger
BMW S55
Engine Series
BMW B48
S55-B30
Engine Code
B48-B20
4
Valves
4
6
Cylinders
4
3 L / 147 cu in
Displacement
2 L / 98 cu in
425 hp
at 5500 rpm
Power
181 hp
at 5000 rpm
M4 Cabrio
425 hp
181 hp
420i Cabrio
406 lb‑ft
at 1850 rpm
Max. Torque
199 lb‑ft
at 1350 rpm
M4 Cabrio
406 lb‑ft
199 lb‑ft
420i Cabrio

Performance

M4 Cabrio
420i Cabrio
155 mph
Maximum Speed
143 mph
4.6 sec
Acceleration 0 to 62 mph
8.4 sec
62 mph 62
mph

210 ft
0.000 sec

M4 Cabrio

62 mph 62
mph

384 ft
0.000 sec

420i Cabrio

▶ REPLAY
9.47 lb/hp
Weight-to-Power Ratio
21.8 lb/hp
M4 Cabrio
9.47 lb/hp
21.8 lb/hp
420i Cabrio

Fuel Economy / Emissions

M4 Cabrio
420i Cabrio
Fuel Economy
26 mpg
combined
41 mpg
M4 Cabrio
26 mpg
41 mpg
420i Cabrio
19 mpg
city
31 mpg
No data
highway
No data
Kraftstoffanzeige
15.9 gal
Fuel Tank Capacity
15.9 gal
Kraftstoffanzeige
409 mi
Range
642 mi
M4 Cabrio
409 mi
642 mi
420i Cabrio
Environmental Impact
172.4 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).
109.9 kWh
M4 Cabrio
172.4 kWh
109.9 kWh
420i Cabrio
Euro 6b (NEFZ)
Emission Standard
Euro 6b (NEFZ)
343 g/mi (NEFZ)
CO2 Emissions
219 g/mi (NEFZ)

Practical Convenience

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