The Comparative Analysis :

BMW 420i Cabrio (17 - 18) vs. ALPINA D4 Bi-Turbo Cabrio Switch-Tronic (17 - 18)

€ 48,500
BMW 420i Cabrio (17 - 18) BMW 420i Cabrio
€ 69,500
 ALPINA D4 Bi-Turbo Cabrio Switch-Tronic (17 - 18) ALPINA D4 Bi-Turbo Cabrio
€ 48,500
Base Price ⓘBase price of a new vehicle with standard equipment in Germany at market launch.
€ 69,500

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

Vehicle Dimensions

Тhere is barely any difference in dimensions between the two vehicles. Both cars are the same width, but the BMW 420i Cabrio is 0.2 cm shorter and 0.6 cm taller.
BMW 420i Cabrio
ALPINA D4 Bi-Turbo Cabrio
1384
Blueprint BMW 420i Cabrio (17 - 18)
1825
2017
1378
Blueprint ALPINA D4 Bi-Turbo Cabrio Switch-Tronic (17 - 18)
1825
2025
1825 mm
Width
1825 mm
2017 mm
Width Incl. Mirrors
2025 mm
1384 mm
Height
1378 mm
Blueprint BMW 420i Cabrio (17 - 18)
2810
4638
Blueprint ALPINA D4 Bi-Turbo Cabrio Switch-Tronic (17 - 18)
2810
4640
4638 mm
Length
4640 mm
2810 mm
Wheelbase
2810 mm

Vehicle Weight

BMW 420i Cabrio
ALPINA D4 Bi-Turbo Cabrio
1775 kg
Kerb Weight
1890 kg
2170 kg
Gross Vehicle
Weight
2265 kg
BMW 420i Cabrio (17 - 18)
Weight Difference:
115 kg
6.08 %
ALPINA D4 Bi-Turbo Cabrio Switch-Tronic (17 - 18)

General

BMW 420i Cabrio
ALPINA D4 Bi-Turbo Cabrio
F33
Generation
F33
Convertible
Car Body Style
Convertible
Super Unleaded (98 RON)
Fuel Type
Diesel
Rear-wheel drive
Drive
Rear-wheel drive
6-speed manual transmission
Transmission
8-speed automatic transmission

Engine

BMW 420i Cabrio
ALPINA D4 Bi-Turbo Cabrio
Straight-four petrol engine with tur­bo­charger
Engine Type
Straight-six diesel engine with two tur­bo­chargers (bi­turbo)
BMW B48
Engine Series
B48-B20
Engine Code
N57-D30
4
Valves
4
4
Cylinders
6
1998 CC
Engine Capacity
2993 CC
181 bhp
at 5000 rpm
Power
345 bhp
at 4000 rpm
BMW 420i Cabrio
181 bhp
345 bhp
ALPINA D4 Bi-Turbo Cabrio
270 NM
at 1350 rpm
Max. Torque
700 NM
at 1500 rpm
BMW 420i Cabrio
270 NM
700 NM
ALPINA D4 Bi-Turbo Cabrio

Performance

BMW 420i Cabrio
ALPINA D4 Bi-Turbo Cabrio
143 mph
Maximum Speed
171 mph
8.2 sec
Acceleration 0 to 62 mph
5 sec
62 mph 62
mph

114 m
0.000 sec

BMW 420i Cabrio

62 mph 62
mph

69 m
0.000 sec

ALPINA D4 Bi-Turbo Cabrio

▶ REPLAY
9.81 kg/bhp
Weight-to-Power Ratio
5.48 kg/bhp
BMW 420i Cabrio
9.81 kg/bhp
5.48 kg/bhp
ALPINA D4 Bi-Turbo Cabrio

Fuel Economy / Emissions

BMW 420i Cabrio
ALPINA D4 Bi-Turbo Cabrio
Fuel Economy
46 mpg
combined
48 mpg
BMW 420i Cabrio
46 mpg
48 mpg
ALPINA D4 Bi-Turbo Cabrio
35 mpg
city
43 mpg
No data
motorway
No data
Kraftstoffanzeige
60 L
Fuel Tank Capacity
60 L
Kraftstoffanzeige
601 mi
Range
632 mi
BMW 420i Cabrio
601 mi
632 mi
ALPINA D4 Bi-Turbo Cabrio
Environmental Impact
117.5 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).
121.3 kWh
BMW 420i Cabrio
117.5 kWh
121.3 kWh
ALPINA D4 Bi-Turbo Cabrio
Euro 6b (NEFZ)
Emission Standard
Euro 6b (NEFZ)
145 g/km (NEFZ)
CO2 Emissions
155 g/km (NEFZ)

Practical Convenience

BMW 420i Cabrio
ALPINA D4 Bi-Turbo Cabrio
2
Doors
2
4
No. of Seats
4
395 kg
Maximum Payload
375 kg
370 L
Boot Capacity
370 L
No data
Boot Capacity (Seats Down)
No data