The Comparative Analysis :
BMW 640i Convertible Steptronic (15 - 18) vs. BMW M6 Convertible M DKG (15 - 18)
€ 91,700
€ 138,800
€ 91,700
Base Price ⓘBase price of a new vehicle with standard equipment in Germany at market launch.
€ 138,800
ⓘBase price of a new vehicle with standard equipment in Germany at market launch. Price Info
Vehicle Dimensions
The 640i Cabrio is a bit smaller in every dimension. It's 0.2 inches shorter, 0.2 inches narrower and 0.1 inches lower than the M6 Cabrio.
640i Cabrio
M6 Cabrio
53.7
74.6
81.9
53.9
74.8
82.9
74.6 in
Width
74.8 in
81.9 in
Width Incl. Mirrors
82.9 in
53.7 in
Height
53.9 in
112.4
192.7
112.2
192.8
192.7 in
Length
192.8 in
112.4 in
Wheelbase
112.2 in
Vehicle Weight
640i Cabrio
M6 Cabrio
4178 lb
Curb Weight
4530 lb
5126 lb
Gross Vehicle
Weight
Weight
5313 lb
Weight Difference:
353 lb
7.79 %
General
640i Cabrio
M6 Cabrio
F12
Generation
F12
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
640i Cabrio
M6 Cabrio
Straight-six gasoline engine with turbocharger
Engine Type
V8 gasoline engine with two turbochargers (biturbo)
BMW N55
Engine Series
BMW S63
N55-B30
Engine Code
S63-B44
4
Valves
4
6
Cylinders
8
3 L / 147 cu in
Displacement
4.4 L / 215 cu in
316 hp
at 5800 rpm
Power
552 hp
at 6000 rpm
640i Cabrio
316 hp
552 hp
M6 Cabrio
332 lb‑ft
at 1300 rpm
Max. Torque
502 lb‑ft
at 1500 rpm
640i Cabrio
332 lb‑ft
502 lb‑ft
M6 Cabrio
Performance
640i Cabrio
M6 Cabrio
155 mph
Maximum Speed
155 mph
5.5 sec
Acceleration 0 to 62 mph
4.3 sec
62 mph
62
mph
mph
249 ft
0.000 sec
640i Cabrio
62 mph
62
mph
mph
197 ft
0.000 sec
M6 Cabrio
▶ REPLAY
13.22 lb/hp
Weight-to-Power Ratio
8.21 lb/hp
640i Cabrio
13.22 lb/hp
8.21 lb/hp
M6 Cabrio
Fuel Economy / Emissions
640i Cabrio
M6 Cabrio
Fuel Economy
31 mpg
combined
23 mpg
640i Cabrio
31 mpg
23 mpg
M6 Cabrio
22 mpg
city
17 mpg
No data
highway
No data
18.5 gal
Fuel Tank Capacity
21.1 gal
565 mi
Range
483 mi
640i Cabrio
565 mi
483 mi
M6 Cabrio
Environmental Impact
145.8 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).
195.2 kWh
640i Cabrio
145.8 kWh
195.2 kWh
M6 Cabrio
Euro 6b (NEFZ)
Emission Standard
Euro 6b (NEFZ)
288 g/mi (NEFZ)
CO2 Emissions
385 g/mi (NEFZ)
Practical Convenience
640i Cabrio
M6 Cabrio
2
Doors
2
4
No. of Seats
4
948 lb
Maximum Payload
783 lb
9.9 cu ft
Trunk Volume
9.9 cu ft
No data
Cargo Volume (Seats Down)
No data
