The Comparative Analysis :
BMW 640i Convertible Steptronic (15 - 18) vs. BMW 840i Convertible Steptronic (19 - ..)
€ 91,700
€ 102,500
€ 91,700
Base Price ⓘBase price of a new vehicle with standard equipment in Germany at market launch.
€ 102,500
ⓘ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 840i Cabrio.
640i Cabrio
840i 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
840i Cabrio
4178 lb
Curb Weight
4200 lb
5126 lb
Gross Vehicle
Weight
Weight
5159 lb
Weight Difference:
22 lb
0.52 %
General
640i Cabrio
840i Cabrio
F12
Generation
G14
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
640i Cabrio
840i Cabrio
Straight-six gasoline engine with turbocharger
Engine Type
Straight-six gasoline engine with turbocharger
BMW N55
Engine Series
BMW B58
N55-B30
Engine Code
B58-B30
4
Valves
4
6
Cylinders
6
3 L / 147 cu in
Displacement
3 L / 147 cu in
316 hp
at 5800 rpm
Power
335 hp
at 5000 rpm
640i Cabrio
316 hp
335 hp
840i Cabrio
332 lb‑ft
at 1300 rpm
Max. Torque
369 lb‑ft
at 1600 rpm
640i Cabrio
332 lb‑ft
369 lb‑ft
840i Cabrio
Performance
640i Cabrio
840i Cabrio
155 mph
Maximum Speed
155 mph
5.5 sec
Acceleration 0 to 62 mph
5.3 sec
62 mph
62
mph
mph
249 ft
0.000 sec
640i Cabrio
62 mph
62
mph
mph
243 ft
0.000 sec
840i Cabrio
▶ REPLAY
13.22 lb/hp
Weight-to-Power Ratio
12.54 lb/hp
640i Cabrio
13.22 lb/hp
12.54 lb/hp
840i Cabrio
Fuel Economy / Emissions
640i Cabrio
840i Cabrio
Fuel Economy
31 mpg
combined
32 mpg
640i Cabrio
31 mpg
32 mpg
840i Cabrio
22 mpg
city
26 mpg
No data
highway
No data
18.5 gal
Fuel Tank Capacity
18 gal
565 mi
Range
571 mi
640i Cabrio
565 mi
571 mi
840i 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).
140.2 kWh
640i Cabrio
145.8 kWh
140.2 kWh
840i Cabrio
Euro 6b (NEFZ)
Emission Standard
Euro 6d-TEMP-EVAP-ISC (WLTP)
288 g/mi (NEFZ)
CO2 Emissions
311 g/mi (WLTP)
Practical Convenience
640i Cabrio
840i Cabrio
2
Doors
2
4
No. of Seats
4
948 lb
Maximum Payload
959 lb
9.9 cu ft
Trunk Volume
9.9 cu ft
No data
Cargo Volume (Seats Down)
No data
