The Comparative Analysis :

BMW 640i Convertible xDrive Steptronic (13 - 14) vs. Porsche 911 Carrera Convertible S (12 - 15)

€ 87,300
BMW 640i Convertible xDrive Steptronic (13 - 14) BMW 640i Cabrio
€ 117,900
 Porsche 911 Carrera Convertible S (12 - 15) Porsche 911 Carrera Convertible S
€ 87,300
Base Price ⓘBase price of a new vehicle with standard equipment in Germany at market launch.
€ 117,900

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

Vehicle Dimensions

The BMW 640i Cabrio is significantly bigger in every dimension. It's 15.9 inches longer, 3.4 inches wider and 2.9 inches taller than the Porsche 911 Carrera Convertible S.
BMW 640i Cabrio
Porsche 911 Carrera Convertible S
53.7
Blueprint BMW 640i Convertible xDrive Steptronic (13 - 14)
74.6
81.9
50.9
Blueprint Porsche 911 Carrera Convertible S (12 - 15)
71.2
77.9
74.6 in
Width
71.2 in
81.9 in
Width Incl. Mirrors
77.9 in
53.7 in
Height
50.9 in
Blueprint BMW 640i Convertible xDrive Steptronic (13 - 14)
112.4
192.7
Blueprint Porsche 911 Carrera Convertible S (12 - 15)
96.5
176.8
192.7 in
Length
176.8 in
112.4 in
Wheelbase
96.5 in

Vehicle Weight

BMW 640i Cabrio
Porsche 911 Carrera Convertible S
4376 lb
Curb Weight
3395 lb
5291 lb
Gross Vehicle
Weight
4156 lb
BMW 640i Convertible xDrive Steptronic (13 - 14)
Weight Difference:
981 lb
22.42 %
Porsche 911 Carrera Convertible S (12 - 15)

General

BMW 640i Cabrio
Porsche 911 Carrera Convertible S
F12
Generation
991
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 manual transmission

Engine

BMW 640i Cabrio
Porsche 911 Carrera Convertible S
Straight-six gasoline engine with tur­bo­charger
Engine Type
6-cylinder boxer gasoline engine (nat­u­ral­ly as­pi­rat­ed engine)
BMW N55
Engine Series
N55-B30
Engine Code
4
Valves
4
6
Cylinders
6
3 L / 147 cu in
Displacement
3.8 L / 186 cu in
316 hp
at 5800 rpm
Power
395 hp
at 7400 rpm
BMW 640i Cabrio
316 hp
395 hp
Porsche 911 Carrera Convertible S
332 lb‑ft
at 1300 rpm
Max. Torque
325 lb‑ft
at 5600 rpm
BMW 640i Cabrio
332 lb‑ft
325 lb‑ft
Porsche 911 Carrera Convertible S

Performance

BMW 640i Cabrio
Porsche 911 Carrera Convertible S
155 mph
Maximum Speed
187 mph
5.4 sec
Acceleration 0 to 62 mph
4.7 sec
62 mph 62
mph

246 ft
0.000 sec

BMW 640i Cabrio

62 mph 62
mph

213 ft
0.000 sec

Porsche 911 Carrera Convertible S

▶ REPLAY
13.85 lb/hp
Weight-to-Power Ratio
8.59 lb/hp
BMW 640i Cabrio
13.85 lb/hp
8.59 lb/hp
Porsche 911 Carrera Convertible S

Fuel Economy / Emissions

BMW 640i Cabrio
Porsche 911 Carrera Convertible S
Fuel Economy
29 mpg
combined
24 mpg
BMW 640i Cabrio
29 mpg
24 mpg
Porsche 911 Carrera Convertible S
21 mpg
city
17 mpg
No data
highway
33 mpg
Kraftstoffanzeige
18.5 gal
Fuel Tank Capacity
16.9 gal
Kraftstoffanzeige
531 mi
Range
410 mi
BMW 640i Cabrio
531 mi
410 mi
Porsche 911 Carrera Convertible S
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).
183.8 kWh
BMW 640i Cabrio
155.3 kWh
183.8 kWh
Porsche 911 Carrera Convertible S
Euro 6b (NEFZ)
Emission Standard
Euro 5 / Euro 6
309 g/mi (NEFZ)
CO2 Emissions
369 g/mi (NEFZ)

Practical Convenience

BMW 640i Cabrio
Porsche 911 Carrera Convertible S
2
Doors
2
4
No. of Seats
4
915 lb
Maximum Payload
761 lb
9.9 cu ft
Trunk Volume
4.1 cu ft
No data
Cargo Volume (Seats Down)
No data