The Comparative Analysis :

BMW 640i Convertible xDrive Steptronic (13 - 14) vs. Porsche 911 Targa 4 GTS (17 - 18)

€ 87,300
BMW 640i Convertible xDrive Steptronic (13 - 14) BMW 640i Cabrio
€ 146,200
 Porsche 911 Targa 4 GTS (17 - 18) Porsche 911 Targa 4 GTS
€ 87,300
Base Price ⓘBase price of a new vehicle with standard equipment in Germany at market launch.
€ 146,200

ⓘ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 14.4 inches longer, 1.7 inches wider and 2.9 inches taller than the Porsche 911 Targa 4 GTS.
BMW 640i Cabrio
Porsche 911 Targa 4 GTS
53.7
Blueprint BMW 640i Convertible xDrive Steptronic (13 - 14)
74.6
81.9
50.8
Blueprint Porsche 911 Targa 4 GTS (17 - 18)
72.9
77.9
74.6 in
Width
72.9 in
81.9 in
Width Incl. Mirrors
77.9 in
53.7 in
Height
50.8 in
Blueprint BMW 640i Convertible xDrive Steptronic (13 - 14)
112.4
192.7
Blueprint Porsche 911 Targa 4 GTS (17 - 18)
96.5
178.3
192.7 in
Length
178.3 in
112.4 in
Wheelbase
96.5 in

Vehicle Weight

BMW 640i Cabrio
Porsche 911 Targa 4 GTS
4376 lb
Curb Weight
3660 lb
5291 lb
Gross Vehicle
Weight
4464 lb
BMW 640i Convertible xDrive Steptronic (13 - 14)
Weight Difference:
717 lb
16.38 %
Porsche 911 Targa 4 GTS (17 - 18)

General

BMW 640i Cabrio
Porsche 911 Targa 4 GTS
F12
Generation
991
Convertible
Car Body Style
Convertible
Premium Unleaded
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 640i Cabrio
Porsche 911 Targa 4 GTS
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 Targa 4 GTS
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 Targa 4 GTS

Performance

BMW 640i Cabrio
Porsche 911 Targa 4 GTS
155 mph
Maximum Speed
191 mph
5.4 sec
Acceleration 0 to 62 mph
4.1 sec
62 mph 62
mph

246 ft
0.000 sec

BMW 640i Cabrio

62 mph 62
mph

187 ft
0.000 sec

Porsche 911 Targa 4 GTS

▶ REPLAY
13.85 lb/hp
Weight-to-Power Ratio
8.24 lb/hp
BMW 640i Cabrio
13.85 lb/hp
8.24 lb/hp
Porsche 911 Targa 4 GTS

Fuel Economy / Emissions

BMW 640i Cabrio
Porsche 911 Targa 4 GTS
Fuel Economy
29 mpg
combined
24 mpg
BMW 640i Cabrio
29 mpg
24 mpg
Porsche 911 Targa 4 GTS
21 mpg
city
18 mpg
No data
highway
31 mpg
Kraftstoffanzeige
18.5 gal
Fuel Tank Capacity
17.7 gal
Kraftstoffanzeige
531 mi
Range
429 mi
BMW 640i Cabrio
531 mi
429 mi
Porsche 911 Targa 4 GTS
Environmental Impact
155.3 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).
183.8 kWh
BMW 640i Cabrio
155.3 kWh
183.8 kWh
Porsche 911 Targa 4 GTS
Euro 6b (NEFZ)
Emission Standard
Euro 6c (NEFZ) 36ZA-ZF
309 g/mi (NEFZ)
CO2 Emissions
354 g/mi (NEFZ)

Practical Convenience

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