The Comparative Analysis :
BMW 640i Convertible Steptronic (15 - 18) vs. BMW 840d Convertible xDrive Steptronic (19 - ..)
€ 91,700
€ 108,000
€ 91,700
Base Price ⓘBase price of a new vehicle with standard equipment in Germany at market launch.
€ 108,000
ⓘBase price of a new vehicle with standard equipment in Germany at market launch. Price Info
Vehicle Dimensions
The dimensions of these vehicles differ a little. The 640i Cabrio is 2 inches longer, 0.3 inches narrower and an inch taller than the 840d Cabrio.
640i Cabrio
840d Cabrio
53.7
74.6
81.9
52.7
74.9
84.1
74.6 in
Width
74.9 in
81.9 in
Width Incl. Mirrors
84.1 in
53.7 in
Height
52.7 in
112.4
192.7
111.1
190.7
192.7 in
Length
190.7 in
112.4 in
Wheelbase
111.1 in
Vehicle Weight
640i Cabrio
840d Cabrio
4178 lb
Curb Weight
4475 lb
5126 lb
Gross Vehicle
Weight
Weight
5478 lb
Weight Difference:
298 lb
6.66 %
General
640i Cabrio
840d Cabrio
F12
Generation
G14
Convertible
Car Body Style
Convertible
Premium Unleaded
Fuel Type
Diesel
Rear-wheel drive
Drivetrain
Permanent all-wheel drive (AWD)
8-speed automatic transmission
Transmission
8-speed automatic transmission
Engine
640i Cabrio
840d Cabrio
Straight-six gasoline engine with turbocharger
Engine Type
Straight-six diesel engine with two turbochargers (biturbo)
BMW N55
Engine Series
BMW B57
N55-B30
Engine Code
B57-D30
4
Valves
4
6
Cylinders
6
3 L / 147 cu in
Displacement
3 L / 147 cu in
316 hp
at 5800 rpm
Power
316 hp
at 4400 rpm
640i Cabrio
316 hp
316 hp
840d Cabrio
332 lb‑ft
at 1300 rpm
Max. Torque
502 lb‑ft
at 1750 rpm
640i Cabrio
332 lb‑ft
502 lb‑ft
840d Cabrio
Performance
640i Cabrio
840d Cabrio
155 mph
Maximum Speed
155 mph
5.5 sec
Acceleration 0 to 62 mph
5.2 sec
62 mph
62
mph
mph
249 ft
0.000 sec
640i Cabrio
62 mph
62
mph
mph
236 ft
0.000 sec
840d Cabrio
▶ REPLAY
13.22 lb/hp
Weight-to-Power Ratio
14.16 lb/hp
640i Cabrio
13.22 lb/hp
14.16 lb/hp
840d Cabrio
Fuel Economy / Emissions
640i Cabrio
840d Cabrio
Fuel Economy
31 mpg
combined
38 mpg
640i Cabrio
31 mpg
38 mpg
840d Cabrio
22 mpg
city
32 mpg
No data
highway
No data
18.5 gal
Fuel Tank Capacity
17.4 gal
565 mi
Range
662 mi
640i Cabrio
565 mi
662 mi
840d 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).
127.6 kWh
640i Cabrio
145.8 kWh
127.6 kWh
840d Cabrio
Euro 6b (NEFZ)
Emission Standard
Euro 6d-TEMP-EVAP-ISC (WLTP)
288 g/mi (NEFZ)
CO2 Emissions
296 g/mi (WLTP)
Practical Convenience
640i Cabrio
840d Cabrio
2
Doors
2
4
No. of Seats
4
948 lb
Maximum Payload
1003 lb
9.9 cu ft
Trunk Volume
9.9 cu ft
No data
Cargo Volume (Seats Down)
No data
