The Comparative Analysis :

BMW 640i Cabrio xDrive Steptronic (15 - 18) vs. Porsche 911 Targa 4S (15 - 15)

€ 95,100
BMW 640i Cabrio xDrive Steptronic (15 - 18) BMW 640i Cabrio
€ 138,900
 Porsche 911 Targa 4S (15 - 15) Porsche 911 Targa 4S
€ 95,100
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 640i Cabrio is significantly bigger in every dimension. It's 40.3 cm longer, 4.2 cm wider and 7.4 cm taller than the Porsche 911 Targa 4S.
BMW 640i Cabrio
Porsche 911 Targa 4S
1365
Blueprint BMW 640i Cabrio xDrive Steptronic (15 - 18)
1894
2081
1291
Blueprint Porsche 911 Targa 4S (15 - 15)
1852
1978
1894 mm
Width
1852 mm
2081 mm
Width Incl. Mirrors
1978 mm
1365 mm
Height
1291 mm
Blueprint BMW 640i Cabrio xDrive Steptronic (15 - 18)
2855
4894
Blueprint Porsche 911 Targa 4S (15 - 15)
2450
4491
4894 mm
Length
4491 mm
2855 mm
Wheelbase
2450 mm

Vehicle Weight

BMW 640i Cabrio
Porsche 911 Targa 4S
1965 kg
Kerb Weight
1630 kg
2390 kg
Gross Vehicle
Weight
1960 kg
BMW 640i Cabrio xDrive Steptronic (15 - 18)
Weight Difference:
335 kg
17.05 %
Porsche 911 Targa 4S (15 - 15)

General

BMW 640i Cabrio
Porsche 911 Targa 4S
F12
Generation
991
Convertible
Car Body Style
Convertible
Super Unleaded (98 RON)
Fuel Type
Super Unleaded (98 RON)
Permanent all-wheel drive
Drive
Permanent all-wheel drive
8-speed automatic transmission
Transmission
7-speed manual transmission

Engine

BMW 640i Cabrio
Porsche 911 Targa 4S
Straight-six petrol engine with tur­bo­charger
Engine Type
6-cylinder boxer petrol engine (nat­u­ral­ly as­pi­rat­ed engine)
BMW N55
Engine Series
N55-B30
Engine Code
4
Valves
4
6
Cylinders
6
2979 CC
Engine Capacity
3800 CC
316 bhp
at 5800 rpm
Power
424 bhp
at 7500 rpm
BMW 640i Cabrio
316 bhp
424 bhp
Porsche 911 Targa 4S
450 NM
at 1300 rpm
Max. Torque
440 NM
at 5750 rpm
BMW 640i Cabrio
450 NM
440 NM
Porsche 911 Targa 4S

Performance

BMW 640i Cabrio
Porsche 911 Targa 4S
155 mph
Maximum Speed
188 mph
5.4 sec
Acceleration 0 to 62 mph
4.7 sec
62 mph 62
mph

75 m
0.000 sec

BMW 640i Cabrio

62 mph 62
mph

65 m
0.000 sec

Porsche 911 Targa 4S

▶ REPLAY
6.22 kg/bhp
Weight-to-Power Ratio
3.84 kg/bhp
BMW 640i Cabrio
6.22 kg/bhp
3.84 kg/bhp
Porsche 911 Targa 4S

Fuel Economy / Emissions

BMW 640i Cabrio
Porsche 911 Targa 4S
Fuel Economy
34 mpg
combined
28 mpg
BMW 640i Cabrio
34 mpg
28 mpg
Porsche 911 Targa 4S
25 mpg
city
20 mpg
No data
motorway
37 mpg
Kraftstoffanzeige
70 L
Fuel Tank Capacity
68 L
Kraftstoffanzeige
531 mi
Range
423 mi
BMW 640i Cabrio
531 mi
423 mi
Porsche 911 Targa 4S
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).
189.4 kWh
BMW 640i Cabrio
155.3 kWh
189.4 kWh
Porsche 911 Targa 4S
Euro 6b (NEFZ)
Emission Standard
Euro 6b (NEFZ)
191 g/km (NEFZ)
CO2 Emissions
237 g/km (NEFZ)

Practical Convenience

BMW 640i Cabrio
Porsche 911 Targa 4S
2
Doors
2
4
No. of Seats
4
425 kg
Maximum Payload
330 kg
350 L
Boot Capacity
125 L
No data
Boot Capacity (Seats Down)
No data