The Comparative Analysis :

BMW 640d Convertible xDrive Steptronic (15 - 18) vs. Porsche 911 Carrera Convertible 4S (12 - 15)

€ 99,300
BMW 640d Convertible xDrive Steptronic (15 - 18) BMW 640d Cabrio
€ 138,900
 Porsche 911 Carrera Convertible 4S (12 - 15) Porsche 911 Carrera Convertible 4S
€ 99,300
Base Price ⓘBase price of a new vehicle with standard equipment in Germany at market launch.
€ 138,900

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

Vehicle Dimensions

The BMW 640d Cabrio is significantly bigger in every dimension. It's 15.9 inches longer, 1.7 inches wider and 2.8 inches taller than the Porsche 911 Carrera Convertible 4S.
BMW 640d Cabrio
Porsche 911 Carrera Convertible 4S
53.7
Blueprint BMW 640d Convertible xDrive Steptronic (15 - 18)
74.6
81.9
50.9
Blueprint Porsche 911 Carrera Convertible 4S (12 - 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 640d Convertible xDrive Steptronic (15 - 18)
112.4
192.7
Blueprint Porsche 911 Carrera Convertible 4S (12 - 15)
96.5
176.8
192.7 in
Length
176.8 in
112.4 in
Wheelbase
96.5 in

Vehicle Weight

BMW 640d Cabrio
Porsche 911 Carrera Convertible 4S
4420 lb
Curb Weight
3505 lb
5379 lb
Gross Vehicle
Weight
4266 lb
BMW 640d Convertible xDrive Steptronic (15 - 18)
Weight Difference:
915 lb
20.7 %
Porsche 911 Carrera Convertible 4S (12 - 15)

General

BMW 640d Cabrio
Porsche 911 Carrera Convertible 4S
F12
Generation
991
Convertible
Car Body Style
Convertible
Diesel
Fuel Type
Premium Unleaded
Permanent all-wheel drive (AWD)
Drivetrain
Permanent all-wheel drive (AWD)
8-speed automatic transmission
Transmission
7-speed manual transmission

Engine

BMW 640d Cabrio
Porsche 911 Carrera Convertible 4S
Straight-six diesel engine with two tur­bo­chargers (bi­turbo)
Engine Type
6-cylinder boxer gasoline engine (nat­u­ral­ly as­pi­rat­ed engine)
BMW N57
Engine Series
N57-D30
Engine Code
4
Valves
4
6
Cylinders
6
3 L / 147 cu in
Displacement
3.8 L / 186 cu in
309 hp
at 4400 rpm
Power
424 hp
at 7500 rpm
BMW 640d Cabrio
309 hp
424 hp
Porsche 911 Carrera Convertible 4S
465 lb‑ft
at 1500 rpm
Max. Torque
325 lb‑ft
at 5750 rpm
BMW 640d Cabrio
465 lb‑ft
325 lb‑ft
Porsche 911 Carrera Convertible 4S

Performance

BMW 640d Cabrio
Porsche 911 Carrera Convertible 4S
155 mph
Maximum Speed
186 mph
5.3 sec
Acceleration 0 to 62 mph
4.6 sec
62 mph 62
mph

243 ft
0.000 sec

BMW 640d Cabrio

62 mph 62
mph

210 ft
0.000 sec

Porsche 911 Carrera Convertible 4S

▶ REPLAY
14.3 lb/hp
Weight-to-Power Ratio
8.27 lb/hp
BMW 640d Cabrio
14.3 lb/hp
8.27 lb/hp
Porsche 911 Carrera Convertible 4S

Fuel Economy / Emissions

BMW 640d Cabrio
Porsche 911 Carrera Convertible 4S
Fuel Economy
41 mpg
combined
24 mpg
BMW 640d Cabrio
41 mpg
24 mpg
Porsche 911 Carrera Convertible 4S
35 mpg
city
16 mpg
No data
highway
31 mpg
Kraftstoffanzeige
18.5 gal
Fuel Tank Capacity
18 gal
Kraftstoffanzeige
750 mi
Range
423 mi
BMW 640d Cabrio
750 mi
423 mi
Porsche 911 Carrera Convertible 4S
Environmental Impact
119.3 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 640d Cabrio
119.3 kWh
189.4 kWh
Porsche 911 Carrera Convertible 4S
Euro 6b (NEFZ)
Emission Standard
Euro 5 / Euro 6
248 g/mi (NEFZ)
CO2 Emissions
380 g/mi (NEFZ)

Practical Convenience

BMW 640d Cabrio
Porsche 911 Carrera Convertible 4S
2
Doors
2
4
No. of Seats
4
959 lb
Maximum Payload
761 lb
9.9 cu ft
Trunk Volume
3.5 cu ft
No data
Cargo Volume (Seats Down)
No data