The Comparative Analysis :
BMW M3 Convertible M DKG (08 - 13) vs. BMW 420i Convertible (17 - 18)
€ 79,100
€ 48,500
€ 79,100
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 dimensions of these vehicles differ a little. The M3 Cabrio is 0.9 inches shorter, 0.8 inches narrower and 0.3 inches taller than the 420i Cabrio.
M3 Cabrio
420i Cabrio
54.8
71
77.8
54.5
71.9
79.4
71 in
Width
71.9 in
77.8 in
Width Incl. Mirrors
79.4 in
54.8 in
Height
54.5 in
108.7
181.7
110.6
182.6
181.7 in
Length
182.6 in
108.7 in
Wheelbase
110.6 in
Vehicle Weight
M3 Cabrio
420i Cabrio
4200 lb
Curb Weight
3913 lb
5027 lb
Gross Vehicle
Weight
Weight
4784 lb
Weight Difference:
287 lb
6.83 %
General
M3 Cabrio
420i Cabrio
E93
Generation
F33
Convertible
Car Body Style
Convertible
Premium Unleaded
Fuel Type
Premium Unleaded
Rear-wheel drive
Drivetrain
Rear-wheel drive
7-speed dual clutch transmission
Transmission
6-speed manual transmission
Engine
M3 Cabrio
420i Cabrio
V8 gasoline engine (naturally aspirated engine)
Engine Type
Straight-four gasoline engine with turbocharger
BMW S65
Engine Series
BMW B48
S65-B40
Engine Code
B48-B20
4
Valves
4
8
Cylinders
4
4 L / 196 cu in
Displacement
2 L / 98 cu in
414 hp
at 8300 rpm
Power
181 hp
at 5000 rpm
M3 Cabrio
414 hp
181 hp
420i Cabrio
295 lb‑ft
at 3900 rpm
Max. Torque
199 lb‑ft
at 1350 rpm
M3 Cabrio
295 lb‑ft
199 lb‑ft
420i Cabrio
Performance
M3 Cabrio
420i Cabrio
155 mph
Maximum Speed
143 mph
5.1 sec
Acceleration 0 to 62 mph
8.2 sec
62 mph
62
mph
mph
233 ft
0.000 sec
M3 Cabrio
62 mph
62
mph
mph
374 ft
0.000 sec
420i Cabrio
▶ REPLAY
10.14 lb/hp
Weight-to-Power Ratio
21.62 lb/hp
M3 Cabrio
10.14 lb/hp
21.62 lb/hp
420i Cabrio
Fuel Economy / Emissions
M3 Cabrio
420i Cabrio
Fuel Economy
19 mpg
combined
38 mpg
M3 Cabrio
19 mpg
38 mpg
420i Cabrio
14 mpg
city
29 mpg
No data
highway
No data
16.6 gal
Fuel Tank Capacity
15.9 gal
318 mi
Range
601 mi
M3 Cabrio
318 mi
601 mi
420i Cabrio
Environmental Impact
233 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
M3 Cabrio
233 kWh
117.5 kWh
420i Cabrio
Euro 4
Emission Standard
Euro 6b (NEFZ)
472 g/mi (NEFZ)
CO2 Emissions
233 g/mi (NEFZ)
Practical Convenience
M3 Cabrio
420i Cabrio
2
Doors
2
4
No. of Seats
4
827 lb
Maximum Payload
871 lb
9.9 cu ft
Trunk Volume
10.5 cu ft
No data
Cargo Volume (Seats Down)
No data
