The Comparative Analysis :

BMW 640i Convertible Steptronic (15 - 18) vs. Rolls-Royce Ghost Dawn 6.6 V12 Black Badge Automatic (17 - ..)

€ 91,700
BMW 640i Convertible Steptronic (15 - 18) BMW 640i Cabrio
€ 381,900
 Rolls-Royce Ghost Dawn 6.6 V12 Black Badge Automatic (17 - ..) Rolls-Royce Ghost 6.6 V12
€ 91,700
Base Price ⓘBase price of a new vehicle with standard equipment in Germany at market launch.
€ 381,900

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

Vehicle Dimensions

The BMW 640i Cabrio is significantly smaller in every dimension. It's 15.4 inches shorter, 2.1 inches narrower and 5.4 inches lower than the Rolls-Royce Ghost 6.6 V12.
BMW 640i Cabrio
Rolls-Royce Ghost 6.6 V12
53.7
Blueprint BMW 640i Convertible Steptronic (15 - 18)
74.6
81.9
59.1
Blueprint Rolls-Royce Ghost Dawn 6.6 V12 Black Badge Automatic (17 - ..)
76.7
84.5
74.6 in
Width
76.7 in
81.9 in
Width Incl. Mirrors
84.5 in
53.7 in
Height
59.1 in
Blueprint BMW 640i Convertible Steptronic (15 - 18)
112.4
192.7
Blueprint Rolls-Royce Ghost Dawn 6.6 V12 Black Badge Automatic (17 - ..)
122.5
208.1
192.7 in
Length
208.1 in
112.4 in
Wheelbase
122.5 in

Vehicle Weight

BMW 640i Cabrio
Rolls-Royce Ghost 6.6 V12
4178 lb
Curb Weight
5644 lb
5126 lb
Gross Vehicle
Weight
6195 lb
BMW 640i Convertible Steptronic (15 - 18)
Weight Difference:
1466 lb
25.98 %
Rolls-Royce Ghost Dawn 6.6 V12 Black Badge Automatic (17 - ..)

General

BMW 640i Cabrio
Rolls-Royce Ghost 6.6 V12
F12
Generation
RR6
Convertible
Car Body Style
Convertible
Premium Unleaded
Fuel Type
Premium Unleaded
Rear-wheel drive
Drivetrain
Rear-wheel drive
8-speed automatic transmission
Transmission
8-speed automatic transmission

Engine

BMW 640i Cabrio
Rolls-Royce Ghost 6.6 V12
Straight-six gasoline engine with tur­bo­charger
Engine Type
V12 gasoline engine with two tur­bo­chargers (bi­turbo)
BMW N55
Engine Series
N55-B30
Engine Code
4
Valves
4
6
Cylinders
12
3 L / 147 cu in
Displacement
6.6 L / 323 cu in
316 hp
at 5800 rpm
Power
593 hp
at 5250 rpm
BMW 640i Cabrio
316 hp
593 hp
Rolls-Royce Ghost 6.6 V12
332 lb‑ft
at 1300 rpm
Max. Torque
620 lb‑ft
at 1650 rpm
BMW 640i Cabrio
332 lb‑ft
620 lb‑ft
Rolls-Royce Ghost 6.6 V12

Performance

BMW 640i Cabrio
Rolls-Royce Ghost 6.6 V12
155 mph
Maximum Speed
155 mph
5.5 sec
Acceleration 0 to 62 mph
4.9 sec
62 mph 62
mph

249 ft
0.000 sec

BMW 640i Cabrio

62 mph 62
mph

223 ft
0.000 sec

Rolls-Royce Ghost 6.6 V12

▶ REPLAY
13.22 lb/hp
Weight-to-Power Ratio
9.52 lb/hp
BMW 640i Cabrio
13.22 lb/hp
9.52 lb/hp
Rolls-Royce Ghost 6.6 V12

Fuel Economy / Emissions

BMW 640i Cabrio
Rolls-Royce Ghost 6.6 V12
Fuel Economy
31 mpg
combined
16 mpg
BMW 640i Cabrio
31 mpg
16 mpg
Rolls-Royce Ghost 6.6 V12
22 mpg
city
10 mpg
No data
highway
23 mpg
Kraftstoffanzeige
18.5 gal
Fuel Tank Capacity
21.9 gal
Kraftstoffanzeige
565 mi
Range
351 mi
BMW 640i Cabrio
565 mi
351 mi
Rolls-Royce Ghost 6.6 V12
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).
278.4 kWh
BMW 640i Cabrio
145.8 kWh
278.4 kWh
Rolls-Royce Ghost 6.6 V12
Euro 6b (NEFZ)
Emission Standard
Euro 6
288 g/mi (NEFZ)
CO2 Emissions
542 g/mi (NEFZ)

Practical Convenience

BMW 640i Cabrio
Rolls-Royce Ghost 6.6 V12
2
Doors
2
4
No. of Seats
4
948 lb
Maximum Payload
551 lb
9.9 cu ft
Trunk Volume
9.1 cu ft
No data
Cargo Volume (Seats Down)
No data