The Comparative Analysis :

BMW 640i Cabrio Steptronic (15 - 18) vs. Porsche 911 Carrera Cabriolet 4 GTS (14 - 15)

€ 91,700
BMW 640i Cabrio Steptronic (15 - 18) BMW 640i Cabrio
€ 137,400
 Porsche 911 Carrera Cabriolet 4 GTS (14 - 15) Porsche 911 Carrera Cabriolet 4 GTS
€ 91,700
Base Price ⓘBase price of a new vehicle with standard equipment in Germany at market launch.
€ 137,400

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

Vehicle Dimensions

The BMW 640i Cabrio is considerably bigger in every dimension. It's 38.5 cm longer, 4.2 cm wider and 7.1 cm taller than the Porsche 911 Carrera Cabriolet 4 GTS.
BMW 640i Cabrio
Porsche 911 Carrera Cabriolet 4 GTS
1365
Blueprint BMW 640i Cabrio Steptronic (15 - 18)
1894
2081
1294
Blueprint Porsche 911 Carrera Cabriolet 4 GTS (14 - 15)
1852
1978
1894 mm
Width
1852 mm
2081 mm
Width Incl. Mirrors
1978 mm
1365 mm
Height
1294 mm
Blueprint BMW 640i Cabrio Steptronic (15 - 18)
2855
4894
Blueprint Porsche 911 Carrera Cabriolet 4 GTS (14 - 15)
2450
4509
4894 mm
Length
4509 mm
2855 mm
Wheelbase
2450 mm

Vehicle Weight

BMW 640i Cabrio
Porsche 911 Carrera Cabriolet 4 GTS
1895 kg
Kerb Weight
1615 kg
2325 kg
Gross Vehicle
Weight
1935 kg
BMW 640i Cabrio Steptronic (15 - 18)
Weight Difference:
280 kg
14.78 %
Porsche 911 Carrera Cabriolet 4 GTS (14 - 15)

General

BMW 640i Cabrio
Porsche 911 Carrera Cabriolet 4 GTS
F12
Generation
991
Convertible
Car Body Style
Convertible
Super Unleaded (98 RON)
Fuel Type
Super Unleaded (98 RON)
Rear-wheel drive
Drive
Permanent all-wheel drive
8-speed automatic transmission
Transmission
7-speed manual transmission

Engine

BMW 640i Cabrio
Porsche 911 Carrera Cabriolet 4 GTS
Straight-six petrol engine with tur­bo­charger
Engine Type
6-cylinder boxer petrol engine (nat­u­ral­ly as­pi­rat­ed engine)
BMW N55
Engine Series
N55-B30
Engine Code
4
Valves
4
6
Cylinders
6
2979 CC
Engine Capacity
3800 CC
316 bhp
at 5800 rpm
Power
424 bhp
at 7500 rpm
BMW 640i Cabrio
316 bhp
424 bhp
Porsche 911 Carrera Cabriolet 4 GTS
450 NM
at 1300 rpm
Max. Torque
440 NM
at 5750 rpm
BMW 640i Cabrio
450 NM
440 NM
Porsche 911 Carrera Cabriolet 4 GTS

Performance

BMW 640i Cabrio
Porsche 911 Carrera Cabriolet 4 GTS
155 mph
Maximum Speed
188 mph
5.5 sec
Acceleration 0 to 62 mph
4.6 sec
62 mph 62
mph

76 m
0.000 sec

BMW 640i Cabrio

62 mph 62
mph

64 m
0.000 sec

Porsche 911 Carrera Cabriolet 4 GTS

▶ REPLAY
6 kg/bhp
Weight-to-Power Ratio
3.81 kg/bhp
BMW 640i Cabrio
6 kg/bhp
3.81 kg/bhp
Porsche 911 Carrera Cabriolet 4 GTS

Fuel Economy / Emissions

BMW 640i Cabrio
Porsche 911 Carrera Cabriolet 4 GTS
Fuel Economy
37 mpg
combined
28 mpg
BMW 640i Cabrio
37 mpg
28 mpg
Porsche 911 Carrera Cabriolet 4 GTS
26 mpg
city
20 mpg
No data
motorway
37 mpg
Kraftstoffanzeige
70 L
Fuel Tank Capacity
68 L
Kraftstoffanzeige
565 mi
Range
423 mi
BMW 640i Cabrio
565 mi
423 mi
Porsche 911 Carrera Cabriolet 4 GTS
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).
189.4 kWh
BMW 640i Cabrio
145.8 kWh
189.4 kWh
Porsche 911 Carrera Cabriolet 4 GTS
Euro 6b (NEFZ)
Emission Standard
Euro 6b (NEFZ)
179 g/km (NEFZ)
CO2 Emissions
235 g/km (NEFZ)

Practical Convenience

BMW 640i Cabrio
Porsche 911 Carrera Cabriolet 4 GTS
2
Doors
2
4
No. of Seats
4
430 kg
Maximum Payload
320 kg
350 L
Boot Capacity
125 L
No data
Boot Capacity (Seats Down)
No data