The Comparative Analysis :

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

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

ⓘ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 3 inches lower than the BMW 640i Cabrio.
Porsche 911 Carrera Convertible S
BMW 640i Cabrio
50.8
Blueprint Porsche 911 Carrera Convertible S PDK (17 - 18)
71.2
77.9
53.7
Blueprint BMW 640i Convertible Steptronic (15 - 18)
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 PDK (17 - 18)
96.5
177.1
Blueprint BMW 640i Convertible Steptronic (15 - 18)
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
3538 lb
Curb Weight
4178 lb
4332 lb
Gross Vehicle
Weight
5126 lb
Porsche 911 Carrera Convertible S PDK (17 - 18)
Weight Difference:
639 lb
15.3 %
BMW 640i Convertible Steptronic (15 - 18)

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
Rear-wheel drive
7-speed dual clutch 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
192 mph
Maximum Speed
155 mph
3.8 sec
Acceleration 0 to 62 mph
5.5 sec
62 mph 62
mph

174 ft
0.000 sec

Porsche 911 Carrera Convertible S

62 mph 62
mph

249 ft
0.000 sec

BMW 640i Cabrio

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

Fuel Economy / Emissions

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

Practical Convenience

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