The Comparative Analysis :

Porsche 911 Carrera Convertible S (17 - 18) vs. BMW 640i Convertible xDrive Steptronic (13 - 14)

€ 135,700
Porsche 911 Carrera Convertible S (17 - 18) Porsche 911 Carrera Convertible S
€ 87,300
 BMW 640i Convertible xDrive Steptronic (13 - 14) BMW 640i Cabrio
€ 135,700
Base Price ⓘBase price of a new vehicle with standard equipment in Germany at market launch.
€ 87,300

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

Vehicle Dimensions

The Porsche 911 Carrera Convertible S is significantly smaller in every dimension. It's 15.6 inches shorter, 3.4 inches narrower and 2.9 inches lower than the BMW 640i Cabrio.
Porsche 911 Carrera Convertible S
BMW 640i Cabrio
50.8
Blueprint Porsche 911 Carrera Convertible S (17 - 18)
71.2
77.9
53.7
Blueprint BMW 640i Convertible xDrive Steptronic (13 - 14)
74.6
81.9
71.2 in
Width
74.6 in
77.9 in
Width Incl. Mirrors
81.9 in
50.8 in
Height
53.7 in
Blueprint Porsche 911 Carrera Convertible S (17 - 18)
96.5
177.1
Blueprint BMW 640i Convertible xDrive Steptronic (13 - 14)
112.4
192.7
177.1 in
Length
192.7 in
96.5 in
Wheelbase
112.4 in

Vehicle Weight

Porsche 911 Carrera Convertible S
BMW 640i Cabrio
3494 lb
Curb Weight
4376 lb
4299 lb
Gross Vehicle
Weight
5291 lb
Porsche 911 Carrera Convertible S (17 - 18)
Weight Difference:
882 lb
20.15 %
BMW 640i Convertible xDrive Steptronic (13 - 14)

General

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

Engine

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

Performance

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

190 ft
0.000 sec

Porsche 911 Carrera Convertible S

62 mph 62
mph

246 ft
0.000 sec

BMW 640i Cabrio

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

Fuel Economy / Emissions

Porsche 911 Carrera Convertible S
BMW 640i Cabrio
Fuel Economy
25 mpg
combined
29 mpg
Porsche 911 Carrera Convertible S
25 mpg
29 mpg
BMW 640i Cabrio
18 mpg
city
21 mpg
32 mpg
highway
No data
Kraftstoffanzeige
16.9 gal
Fuel Tank Capacity
18.5 gal
Kraftstoffanzeige
423 mi
Range
531 mi
Porsche 911 Carrera Convertible S
423 mi
531 mi
BMW 640i Cabrio
Environmental Impact
178.2 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).
155.3 kWh
Porsche 911 Carrera Convertible S
178.2 kWh
155.3 kWh
BMW 640i Cabrio
Euro 6c (NEFZ) 36ZA-ZF
Emission Standard
Euro 6b (NEFZ)
344 g/mi (NEFZ)
CO2 Emissions
309 g/mi (NEFZ)

Practical Convenience

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