The Comparative Analysis :

BMW 640i Convertible Steptronic (15 - 18) vs. Porsche 911 Carrera Convertible S PDK (17 - 18)

€ 91,700
BMW 640i Convertible Steptronic (15 - 18) BMW 640i Cabrio
€ 138,800
 Porsche 911 Carrera Convertible S PDK (17 - 18) Porsche 911 Carrera Convertible S
€ 91,700
Base Price ⓘBase price of a new vehicle with standard equipment in Germany at market launch.
€ 138,800

ⓘ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 15.6 inches longer, 3.4 inches wider and 3 inches taller than the Porsche 911 Carrera Convertible S.
BMW 640i Cabrio
Porsche 911 Carrera Convertible S
53.7
Blueprint BMW 640i Convertible Steptronic (15 - 18)
74.6
81.9
50.8
Blueprint Porsche 911 Carrera Convertible S PDK (17 - 18)
71.2
77.9
74.6 in
Width
71.2 in
81.9 in
Width Incl. Mirrors
77.9 in
53.7 in
Height
50.8 in
Blueprint BMW 640i Convertible Steptronic (15 - 18)
112.4
192.7
Blueprint Porsche 911 Carrera Convertible S PDK (17 - 18)
96.5
177.1
192.7 in
Length
177.1 in
112.4 in
Wheelbase
96.5 in

Vehicle Weight

BMW 640i Cabrio
Porsche 911 Carrera Convertible S
4178 lb
Curb Weight
3538 lb
5126 lb
Gross Vehicle
Weight
4332 lb
BMW 640i Convertible Steptronic (15 - 18)
Weight Difference:
639 lb
15.3 %
Porsche 911 Carrera Convertible S PDK (17 - 18)

General

BMW 640i Cabrio
Porsche 911 Carrera Convertible S
F12
Generation
991
Convertible
Car Body Style
Convertible
Premium Unleaded
Fuel Type
Premium Unleaded
Rear-wheel drive
Drivetrain
Rear-wheel drive
8-speed automatic transmission
Transmission
7-speed dual clutch transmission

Engine

BMW 640i Cabrio
Porsche 911 Carrera Convertible S
Straight-six gasoline engine with tur­bo­charger
Engine Type
6-cylinder boxer gasoline engine with two tur­bo­chargers (bi­turbo)
BMW N55
Engine Series
N55-B30
Engine Code
4
Valves
4
6
Cylinders
6
3 L / 147 cu in
Displacement
3 L / 147 cu in
316 hp
at 5800 rpm
Power
444 hp
at 6500 rpm
BMW 640i Cabrio
316 hp
444 hp
Porsche 911 Carrera Convertible S
332 lb‑ft
at 1300 rpm
Max. Torque
406 lb‑ft
at 2150 rpm
BMW 640i Cabrio
332 lb‑ft
406 lb‑ft
Porsche 911 Carrera Convertible S

Performance

BMW 640i Cabrio
Porsche 911 Carrera Convertible S
155 mph
Maximum Speed
192 mph
5.5 sec
Acceleration 0 to 62 mph
3.8 sec
62 mph 62
mph

249 ft
0.000 sec

BMW 640i Cabrio

62 mph 62
mph

174 ft
0.000 sec

Porsche 911 Carrera Convertible S

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

Fuel Economy / Emissions

BMW 640i Cabrio
Porsche 911 Carrera Convertible S
Fuel Economy
31 mpg
combined
28 mpg
BMW 640i Cabrio
31 mpg
28 mpg
Porsche 911 Carrera Convertible S
22 mpg
city
22 mpg
No data
highway
34 mpg
Kraftstoffanzeige
18.5 gal
Fuel Tank Capacity
16.9 gal
Kraftstoffanzeige
565 mi
Range
473 mi
BMW 640i Cabrio
565 mi
473 mi
Porsche 911 Carrera Convertible S
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).
159.2 kWh
BMW 640i Cabrio
145.8 kWh
159.2 kWh
Porsche 911 Carrera Convertible S
Euro 6b (NEFZ)
Emission Standard
Euro 6c (NEFZ) 36ZA-ZF
288 g/mi (NEFZ)
CO2 Emissions
306 g/mi (NEFZ)

Practical Convenience

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