The Comparative Analysis :

BMW 640i Convertible Steptronic (13 - 14) vs. Porsche 911 Carrera Convertible 4 GTS PDK (14 - 15)

€ 83,900
BMW 640i Convertible Steptronic (13 - 14) BMW 640i Cabrio
€ 141,600
 Porsche 911 Carrera Convertible 4 GTS PDK (14 - 15) Porsche 911 Carrera Convertible 4 GTS
€ 83,900
Base Price ⓘBase price of a new vehicle with standard equipment in Germany at market launch.
€ 141,600

ⓘ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 15.2 inches longer, 1.7 inches wider and 2.8 inches taller than the Porsche 911 Carrera Convertible 4 GTS.
BMW 640i Cabrio
Porsche 911 Carrera Convertible 4 GTS
53.7
Blueprint BMW 640i Convertible Steptronic (13 - 14)
74.6
81.9
50.9
Blueprint Porsche 911 Carrera Convertible 4 GTS PDK (14 - 15)
72.9
77.9
74.6 in
Width
72.9 in
81.9 in
Width Incl. Mirrors
77.9 in
53.7 in
Height
50.9 in
Blueprint BMW 640i Convertible Steptronic (13 - 14)
112.4
192.7
Blueprint Porsche 911 Carrera Convertible 4 GTS PDK (14 - 15)
96.5
177.5
192.7 in
Length
177.5 in
112.4 in
Wheelbase
96.5 in

Vehicle Weight

BMW 640i Cabrio
Porsche 911 Carrera Convertible 4 GTS
4222 lb
Curb Weight
3605 lb
5049 lb
Gross Vehicle
Weight
4310 lb
BMW 640i Convertible Steptronic (13 - 14)
Weight Difference:
617 lb
14.61 %
Porsche 911 Carrera Convertible 4 GTS PDK (14 - 15)

General

BMW 640i Cabrio
Porsche 911 Carrera Convertible 4 GTS
F12
Generation
991
Convertible
Car Body Style
Convertible
Premium Unleaded
Fuel Type
Premium Unleaded
Rear-wheel drive
Drivetrain
Permanent all-wheel drive (AWD)
8-speed automatic transmission
Transmission
7-speed dual clutch transmission

Engine

BMW 640i Cabrio
Porsche 911 Carrera Convertible 4 GTS
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
424 hp
at 7500 rpm
BMW 640i Cabrio
316 hp
424 hp
Porsche 911 Carrera Convertible 4 GTS
332 lb‑ft
at 1300 rpm
Max. Torque
325 lb‑ft
at 5750 rpm
BMW 640i Cabrio
332 lb‑ft
325 lb‑ft
Porsche 911 Carrera Convertible 4 GTS

Performance

BMW 640i Cabrio
Porsche 911 Carrera Convertible 4 GTS
155 mph
Maximum Speed
187 mph
5.7 sec
Acceleration 0 to 62 mph
4.2 sec
62 mph 62
mph

259 ft
0.000 sec

BMW 640i Cabrio

62 mph 62
mph

190 ft
0.000 sec

Porsche 911 Carrera Convertible 4 GTS

▶ REPLAY
13.36 lb/hp
Weight-to-Power Ratio
8.5 lb/hp
BMW 640i Cabrio
13.36 lb/hp
8.5 lb/hp
Porsche 911 Carrera Convertible 4 GTS

Fuel Economy / Emissions

BMW 640i Cabrio
Porsche 911 Carrera Convertible 4 GTS
Fuel Economy
30 mpg
combined
26 mpg
BMW 640i Cabrio
30 mpg
26 mpg
Porsche 911 Carrera Convertible 4 GTS
22 mpg
city
19 mpg
No data
highway
33 mpg
Kraftstoffanzeige
18.5 gal
Fuel Tank Capacity
18 gal
Kraftstoffanzeige
557 mi
Range
459 mi
BMW 640i Cabrio
557 mi
459 mi
Porsche 911 Carrera Convertible 4 GTS
Environmental Impact
147.7 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).
174.3 kWh
BMW 640i Cabrio
147.7 kWh
174.3 kWh
Porsche 911 Carrera Convertible 4 GTS
Euro 6b (NEFZ)
Emission Standard
Euro 6b (NEFZ)
291 g/mi (NEFZ)
CO2 Emissions
344 g/mi (NEFZ)

Practical Convenience

BMW 640i Cabrio
Porsche 911 Carrera Convertible 4 GTS
2
Doors
2
4
No. of Seats
4
827 lb
Maximum Payload
705 lb
9.9 cu ft
Trunk Volume
3.5 cu ft
No data
Cargo Volume (Seats Down)
No data