The Comparative Analysis :

BMW 640i Convertible xDrive Steptronic (15 - 18) vs. BMW M6 Convertible Competition M DKG (15 - 18)

€ 95,100
BMW 640i Convertible xDrive Steptronic (15 - 18) 640i Cabrio
€ 148,300
 BMW M6 Convertible Competition M DKG (15 - 18) M6 Cabrio
€ 95,100
Base Price ⓘBase price of a new vehicle with standard equipment in Germany at market launch.
€ 148,300

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

Vehicle Dimensions

Тhere is barely any difference in dimensions between the two vehicles. The 640i Cabrio is just 0.2 inches shorter, 0.2 inches narrower and 0.3 inches taller than the M6 Cabrio.
640i Cabrio
M6 Cabrio
53.7
Blueprint BMW 640i Convertible xDrive Steptronic (15 - 18)
74.6
81.9
53.5
Blueprint BMW M6 Convertible Competition M DKG (15 - 18)
74.8
82.9
74.6 in
Width
74.8 in
81.9 in
Width Incl. Mirrors
82.9 in
53.7 in
Height
53.5 in
Blueprint BMW 640i Convertible xDrive Steptronic (15 - 18)
112.4
192.7
Blueprint BMW M6 Convertible Competition M DKG (15 - 18)
112.2
192.8
192.7 in
Length
192.8 in
112.4 in
Wheelbase
112.2 in

Vehicle Weight

640i Cabrio
M6 Cabrio
4332 lb
Curb Weight
4530 lb
5269 lb
Gross Vehicle
Weight
5313 lb
BMW 640i Convertible xDrive Steptronic (15 - 18)
Weight Difference:
198 lb
4.37 %
BMW M6 Convertible Competition M DKG (15 - 18)

General

640i Cabrio
M6 Cabrio
F12
Generation
F12
Convertible
Car Body Style
Convertible
Premium Unleaded
Fuel Type
Premium Unleaded
Permanent all-wheel drive (AWD)
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
592 hp
at 6000 rpm
640i Cabrio
316 hp
592 hp
M6 Cabrio
332 lb‑ft
at 1300 rpm
Max. Torque
516 lb‑ft
at 1500 rpm
640i Cabrio
332 lb‑ft
516 lb‑ft
M6 Cabrio

Performance

640i Cabrio
M6 Cabrio
155 mph
Maximum Speed
155 mph
5.4 sec
Acceleration 0 to 62 mph
4 sec
62 mph 62
mph

246 ft
0.000 sec

640i Cabrio

62 mph 62
mph

184 ft
0.000 sec

M6 Cabrio

▶ REPLAY
13.71 lb/hp
Weight-to-Power Ratio
7.65 lb/hp
640i Cabrio
13.71 lb/hp
7.65 lb/hp
M6 Cabrio

Fuel Economy / Emissions

640i Cabrio
M6 Cabrio
Fuel Economy
29 mpg
combined
23 mpg
640i Cabrio
29 mpg
23 mpg
M6 Cabrio
21 mpg
city
17 mpg
No data
highway
No data
Kraftstoffanzeige
18.5 gal
Fuel Tank Capacity
21.1 gal
Kraftstoffanzeige
531 mi
Range
483 mi
640i Cabrio
531 mi
483 mi
M6 Cabrio
Environmental Impact
155.3 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).
195.2 kWh
640i Cabrio
155.3 kWh
195.2 kWh
M6 Cabrio
Euro 6b (NEFZ)
Emission Standard
Euro 6b (NEFZ)
307 g/mi (NEFZ)
CO2 Emissions
385 g/mi (NEFZ)

Practical Convenience

640i Cabrio
M6 Cabrio
2
Doors
2
4
No. of Seats
4
937 lb
Maximum Payload
783 lb
9.9 cu ft
Trunk Volume
9.9 cu ft
No data
Cargo Volume (Seats Down)
No data