The Comparative Analysis :
BMW 420d Convertible Steptronic (17 - ..) vs. BMW M3 Convertible SMG (04 - 06)
€ 53,900
€ 67,000
€ 53,900
Base Price ⓘBase price of a new vehicle with standard equipment in Germany at market launch.
€ 67,000
ⓘBase price of a new vehicle with standard equipment in Germany at market launch. Price Info
Vehicle Dimensions
The 420d Cabrio is considerably bigger in every dimension. It's 5.7 inches longer, 1.8 inches wider and 0.5 inches taller than the M3 Cabrio.
420d Cabrio
M3 Cabrio
54.5
71.9
79.4
54
70.1
78
71.9 in
Width
70.1 in
79.4 in
Width Incl. Mirrors
78 in
54.5 in
Height
54 in
110.6
182.6
107.5
176.9
182.6 in
Length
176.9 in
110.6 in
Wheelbase
107.5 in
Vehicle Weight
420d Cabrio
M3 Cabrio
4057 lb
Curb Weight
3814 lb
4916 lb
Gross Vehicle
Weight
Weight
4630 lb
Weight Difference:
243 lb
5.99 %
General
420d Cabrio
M3 Cabrio
F33
Generation
E46
Convertible
Car Body Style
Convertible
Diesel
Fuel Type
Premium Unleaded
Rear-wheel drive
Drivetrain
Rear-wheel drive
8-speed automatic transmission
Transmission
6-speed automated manual transmission (AMT)
Engine
420d Cabrio
M3 Cabrio
Straight-four diesel engine with turbocharger
Engine Type
Straight-six gasoline engine (naturally aspirated engine)
BMW B47
Engine Series
BMW S54
B47-D20
Engine Code
S54-B32
4
Valves
4
4
Cylinders
6
2 L / 98 cu in
Displacement
3.2 L / 157 cu in
187 hp
at 4000 rpm
Power
338 hp
at 7900 rpm
420d Cabrio
187 hp
338 hp
M3 Cabrio
295 lb‑ft
at 1750 rpm
Max. Torque
269 lb‑ft
at 4900 rpm
420d Cabrio
295 lb‑ft
269 lb‑ft
M3 Cabrio
Performance
420d Cabrio
M3 Cabrio
142 mph
Maximum Speed
155 mph
8.1 sec
Acceleration 0 to 62 mph
5.5 sec
62 mph
62
mph
mph
371 ft
0.000 sec
420d Cabrio
62 mph
62
mph
mph
249 ft
0.000 sec
M3 Cabrio
▶ REPLAY
21.7 lb/hp
Weight-to-Power Ratio
11.28 lb/hp
420d Cabrio
21.7 lb/hp
11.28 lb/hp
M3 Cabrio
Fuel Economy / Emissions
420d Cabrio
M3 Cabrio
Fuel Economy
49 mpg
combined
17 mpg
420d Cabrio
49 mpg
17 mpg
M3 Cabrio
44 mpg
city
11 mpg
No data
highway
No data
15.1 gal
Fuel Tank Capacity
16.6 gal
738 mi
Range
288 mi
420d Cabrio
738 mi
288 mi
M3 Cabrio
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).
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).
257.7 kWh
420d Cabrio
98.8 kWh
257.7 kWh
M3 Cabrio
Euro 6d-TEMP-EVAP-ISC (WLTP)
Emission Standard
Euro 4
251 g/mi (WLTP)
CO2 Emissions
528 g/mi (NEFZ)
Practical Convenience
420d Cabrio
M3 Cabrio
2
Doors
2
4
No. of Seats
4
860 lb
Maximum Payload
816 lb
10.5 cu ft
Trunk Volume
8.5 cu ft
No data
Cargo Volume (Seats Down)
No data
