The Comparative Analysis :
BMW M4 Convertible (17 - 18) vs. BMW 420i Convertible (17 - 18)
€ 85,500
€ 48,500
€ 85,500
Base Price ⓘBase price of a new vehicle with standard equipment in Germany at market launch.
€ 48,500
ⓘ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
73.6
79.3
54.5
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
110.7
183.9
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
3913 lb
4960 lb
Gross Vehicle
Weight
Weight
4784 lb
Weight Difference:
110 lb
2.73 %
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
6-speed manual 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
8.2 sec
62 mph
62
mph
mph
210 ft
0.000 sec
M4 Cabrio
62 mph
62
mph
mph
374 ft
0.000 sec
420i Cabrio
▶ REPLAY
9.47 lb/hp
Weight-to-Power Ratio
21.62 lb/hp
M4 Cabrio
9.47 lb/hp
21.62 lb/hp
420i Cabrio
Fuel Economy / Emissions
M4 Cabrio
420i Cabrio
Fuel Economy
25 mpg
combined
38 mpg
M4 Cabrio
25 mpg
38 mpg
420i Cabrio
19 mpg
city
29 mpg
No data
highway
No data
15.9 gal
Fuel Tank Capacity
15.9 gal
393 mi
Range
601 mi
M4 Cabrio
393 mi
601 mi
420i Cabrio
Environmental Impact
179.9 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).
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).
117.5 kWh
M4 Cabrio
179.9 kWh
117.5 kWh
420i Cabrio
Euro 6b (NEFZ)
Emission Standard
Euro 6b (NEFZ)
351 g/mi (NEFZ)
CO2 Emissions
233 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
