The Comparative Analysis :

BMW 640i Convertible xDrive Steptronic (13 - 14) vs. Porsche 911 Targa 4 (14 - 15)

€ 87,300
BMW 640i Convertible xDrive Steptronic (13 - 14) BMW 640i Cabrio
€ 110,300
 Porsche 911 Targa 4 (14 - 15) Porsche 911 Targa 4
€ 87,300
Base Price ⓘBase price of a new vehicle with standard equipment in Germany at market launch.
€ 110,300

ⓘ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 15.9 inches longer, 1.7 inches wider and 2.6 inches taller than the Porsche 911 Targa 4.
BMW 640i Cabrio
Porsche 911 Targa 4
53.7
Blueprint BMW 640i Convertible xDrive Steptronic (13 - 14)
74.6
81.9
51.1
Blueprint Porsche 911 Targa 4 (14 - 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
51.1 in
Blueprint BMW 640i Convertible xDrive Steptronic (13 - 14)
112.4
192.7
Blueprint Porsche 911 Targa 4 (14 - 15)
96.5
176.8
192.7 in
Length
176.8 in
112.4 in
Wheelbase
96.5 in

Vehicle Weight

BMW 640i Cabrio
Porsche 911 Targa 4
4376 lb
Curb Weight
3560 lb
5291 lb
Gross Vehicle
Weight
4244 lb
BMW 640i Convertible xDrive Steptronic (13 - 14)
Weight Difference:
816 lb
18.65 %
Porsche 911 Targa 4 (14 - 15)

General

BMW 640i Cabrio
Porsche 911 Targa 4
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
Straight-six gasoline engine with tur­bo­charger
Engine Type
6-cylinder boxer gasoline engine (nat­u­ral­ly as­pi­rat­ed engine)
BMW N55
Engine Series
N55-B30
Engine Code
4
Valves
4
6
Cylinders
6
3 L / 147 cu in
Displacement
3.4 L / 166 cu in
316 hp
at 5800 rpm
Power
345 hp
at 7400 rpm
BMW 640i Cabrio
316 hp
345 hp
Porsche 911 Targa 4
332 lb‑ft
at 1300 rpm
Max. Torque
288 lb‑ft
at 5600 rpm
BMW 640i Cabrio
332 lb‑ft
288 lb‑ft
Porsche 911 Targa 4

Performance

BMW 640i Cabrio
Porsche 911 Targa 4
155 mph
Maximum Speed
175 mph
5.4 sec
Acceleration 0 to 62 mph
5.2 sec
62 mph 62
mph

246 ft
0.000 sec

BMW 640i Cabrio

62 mph 62
mph

236 ft
0.000 sec

Porsche 911 Targa 4

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

Fuel Economy / Emissions

BMW 640i Cabrio
Porsche 911 Targa 4
Fuel Economy
29 mpg
combined
25 mpg
BMW 640i Cabrio
29 mpg
25 mpg
Porsche 911 Targa 4
21 mpg
city
18 mpg
No data
highway
31 mpg
Kraftstoffanzeige
18.5 gal
Fuel Tank Capacity
18 gal
Kraftstoffanzeige
531 mi
Range
445 mi
BMW 640i Cabrio
531 mi
445 mi
Porsche 911 Targa 4
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).
179.9 kWh
BMW 640i Cabrio
155.3 kWh
179.9 kWh
Porsche 911 Targa 4
Euro 6b (NEFZ)
Emission Standard
Euro 6b (NEFZ)
309 g/mi (NEFZ)
CO2 Emissions
359 g/mi (NEFZ)

Practical Convenience

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