The Comparative Analysis :
BMW 640i Convertible xDrive Steptronic (15 - 18) vs. Mercedes S 65 AMG Convertible SPEEDSHIFT Plus (16 - 17)
€ 95,100
![BMW 640i Convertible xDrive Steptronic (15 - 18)](graphbase/cars/cars_big_png/BMW_6er_F12-15.png)
€ 256,200
![Mercedes S 65 AMG Convertible SPEEDSHIFT Plus (16 - 17)](graphbase/cars/cars_big/Mercedes_S_63_AMG_A217.webp)
€ 95,100
Base Price ⓘBase price of a new vehicle with standard equipment in Germany at market launch.
€ 256,200
ⓘBase price of a new vehicle with standard equipment in Germany at market launch. Price Info
Vehicle Dimensions
The BMW 640i Cabrio is considerably smaller in every dimension. It's 5.9 inches shorter, 0.7 inches narrower and 2.2 inches lower than the Mercedes S 65 AMG Convertible.
BMW 640i Cabrio
Mercedes S 65 AMG Convertible
53.7
74.6
81.9
56
75.3
83
74.6 in
Width
75.3 in
81.9 in
Width Incl. Mirrors
83 in
53.7 in
Height
56 in
112.4
192.7
115.9
198.6
192.7 in
Length
198.6 in
112.4 in
Wheelbase
115.9 in
Vehicle Weight
BMW 640i Cabrio
Mercedes S 65 AMG Convertible
4332 lb
Curb Weight
4971 lb
5269 lb
Gross Vehicle
Weight
Weight
5787 lb
![BMW 640i Convertible xDrive Steptronic (15 - 18)](graphbase/cars/cars_big_png/BMW_6er_F12-15.png)
Weight Difference:
639 lb
12.85 %
![Mercedes S 65 AMG Convertible SPEEDSHIFT Plus (16 - 17)](graphbase/cars/cars_big_png/Mercedes_S_63_AMG_A217.png)
General
BMW 640i Cabrio
Mercedes S 65 AMG Convertible
F12
Generation
A217
Convertible
Car Body Style
Convertible
Premium Unleaded
Fuel Type
Premium Unleaded
![](graphbase/drivetrain/AWD.png)
Permanent all-wheel drive (AWD)
Drivetrain
Rear-wheel drive
![](graphbase/drivetrain/RWD.png)
8-speed automatic transmission
Transmission
7-speed automatic transmission
Engine
BMW 640i Cabrio
Mercedes S 65 AMG Convertible
Straight-six gasoline engine with turbocharger
Engine Type
V12 gasoline engine with two turbochargers (biturbo)
BMW N55
Engine Series
Mercedes-Benz M 279
N55-B30
Engine Code
M 279.980
![](graphbase/engines/BMW_N55.png)
![](graphbase/engines/Mercedes-Benz_M_279.png)
4
Valves
4
6
Cylinders
12
3 L / 147 cu in
Displacement
6 L / 294 cu in
316 hp
at 5800 rpm
Power
621 hp
at 4800 rpm
BMW 640i Cabrio
316 hp
621 hp
Mercedes S 65 AMG Convertible
332 lb‑ft
at 1300 rpm
Max. Torque
738 lb‑ft
at 2300 rpm
BMW 640i Cabrio
332 lb‑ft
738 lb‑ft
Mercedes S 65 AMG Convertible
Performance
BMW 640i Cabrio
Mercedes S 65 AMG Convertible
155 mph
Maximum Speed
155 mph
5.4 sec
Acceleration 0 to 62 mph
4.1 sec
62 mph
62
mph
mph
246 ft
0.000 sec
![](graphbase/cars/cars_small_png/BMW_6er_F12-15.png)
BMW 640i Cabrio
62 mph
62
mph
mph
187 ft
0.000 sec
![](graphbase/cars/cars_small_png/Mercedes_S_63_AMG_A217.png)
Mercedes S 65 AMG Convertible
▶ REPLAY
13.71 lb/hp
Weight-to-Power Ratio
8 lb/hp
BMW 640i Cabrio
13.71 lb/hp
8 lb/hp
Mercedes S 65 AMG Convertible
Fuel Economy / Emissions
BMW 640i Cabrio
Mercedes S 65 AMG Convertible
Fuel Economy
29 mpg
combined
20 mpg
BMW 640i Cabrio
29 mpg
20 mpg
Mercedes S 65 AMG Convertible
21 mpg
city
14 mpg
No data
highway
26 mpg
18.5 gal
Fuel Tank Capacity
21.1 gal
531 mi
Range
414 mi
BMW 640i Cabrio
531 mi
414 mi
Mercedes S 65 AMG Convertible
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).
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).
227.4 kWh
BMW 640i Cabrio
155.3 kWh
227.4 kWh
Mercedes S 65 AMG Convertible
Euro 6b (NEFZ)
Emission Standard
Euro 6b (NEFZ)
307 g/mi (NEFZ)
CO2 Emissions
438 g/mi (NEFZ)
Practical Convenience
BMW 640i Cabrio
Mercedes S 65 AMG Convertible
2
Doors
2
4
No. of Seats
4
937 lb
Maximum Payload
816 lb
9.9 cu ft
Trunk Volume
9.9 cu ft
![](graphbase/koffer/KL.png)
![](graphbase/koffer/KL.png)
![](graphbase/koffer/KM.png)
![](graphbase/koffer/KS.png)
![](graphbase/koffer/KL.png)
![](graphbase/koffer/KL.png)
![](graphbase/koffer/KM.png)
![](graphbase/koffer/KS.png)
No data
Cargo Volume (Seats Down)
No data