The Comparative Analysis :

ALPINA B4 S Bi-Turbo Cabrio Switch-Tronic (17 - 18) vs. BMW 420i Cabrio Steptronic (16 - 17)

€ 81,400
ALPINA B4 S Bi-Turbo Cabrio Switch-Tronic (17 - 18) ALPINA B4 S Bi-Turbo Cabrio
€ 46,900
 BMW 420i Cabrio Steptronic (16 - 17) BMW 420i Cabrio
€ 81,400
Base Price ⓘBase price of a new vehicle with standard equipment in Germany at market launch.
€ 46,900

ⓘ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 ALPINA B4 S Bi-Turbo Cabrio is 0.2 cm longer and 0.4 cm lower.
ALPINA B4 S Bi-Turbo Cabrio
BMW 420i Cabrio
1380
Blueprint ALPINA B4 S Bi-Turbo Cabrio Switch-Tronic (17 - 18)
1825
2025
1384
Blueprint BMW 420i Cabrio Steptronic (16 - 17)
1825
2017
1825 mm
Width
1825 mm
2025 mm
Width Incl. Mirrors
2017 mm
1380 mm
Height
1384 mm
Blueprint ALPINA B4 S Bi-Turbo Cabrio Switch-Tronic (17 - 18)
2810
4640
Blueprint BMW 420i Cabrio Steptronic (16 - 17)
2810
4638
4640 mm
Length
4638 mm
2810 mm
Wheelbase
2810 mm

Vehicle Weight

ALPINA B4 S Bi-Turbo Cabrio
BMW 420i Cabrio
1915 kg
Kerb Weight
1790 kg
2300 kg
Gross Vehicle
Weight
2185 kg
ALPINA B4 S Bi-Turbo Cabrio Switch-Tronic (17 - 18)
Weight Difference:
125 kg
6.53 %
BMW 420i Cabrio Steptronic (16 - 17)

General

ALPINA B4 S Bi-Turbo Cabrio
BMW 420i Cabrio
F33
Generation
F33
Convertible
Car Body Style
Convertible
Super Unleaded (98 RON)
Fuel Type
Super Unleaded (98 RON)
Rear-wheel drive
Drive
Rear-wheel drive
8-speed automatic transmission
Transmission
8-speed automatic transmission

Engine

ALPINA B4 S Bi-Turbo Cabrio
BMW 420i Cabrio
Straight-six petrol engine with two tur­bo­chargers (bi­turbo)
Engine Type
Straight-four petrol engine with tur­bo­charger
Engine Series
BMW B48
N55-B30
Engine Code
B48-B20
4
Valves
4
6
Cylinders
4
2979 CC
Engine Capacity
1997 CC
434 bhp
at 5500 rpm
Power
181 bhp
at 5000 rpm
ALPINA B4 S Bi-Turbo Cabrio
434 bhp
181 bhp
BMW 420i Cabrio
660 NM
at 3000 rpm
Max. Torque
270 NM
at 1350 rpm
ALPINA B4 S Bi-Turbo Cabrio
660 NM
270 NM
BMW 420i Cabrio

Performance

ALPINA B4 S Bi-Turbo Cabrio
BMW 420i Cabrio
189 mph
Maximum Speed
143 mph
4.3 sec
Acceleration 0 to 62 mph
8.4 sec
62 mph 62
mph

60 m
0.000 sec

ALPINA B4 S Bi-Turbo Cabrio

62 mph 62
mph

117 m
0.000 sec

BMW 420i Cabrio

▶ REPLAY
4.41 kg/bhp
Weight-to-Power Ratio
9.89 kg/bhp
ALPINA B4 S Bi-Turbo Cabrio
4.41 kg/bhp
9.89 kg/bhp
BMW 420i Cabrio

Fuel Economy / Emissions

ALPINA B4 S Bi-Turbo Cabrio
BMW 420i Cabrio
Fuel Economy
34 mpg
combined
49 mpg
ALPINA B4 S Bi-Turbo Cabrio
34 mpg
49 mpg
BMW 420i Cabrio
25 mpg
city
37 mpg
No data
motorway
No data
Kraftstoffanzeige
60 L
Fuel Tank Capacity
60 L
Kraftstoffanzeige
449 mi
Range
642 mi
ALPINA B4 S Bi-Turbo Cabrio
449 mi
642 mi
BMW 420i Cabrio
Environmental Impact
157.2 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).
109.9 kWh
ALPINA B4 S Bi-Turbo Cabrio
157.2 kWh
109.9 kWh
BMW 420i Cabrio
Euro 6c (NEFZ)
Emission Standard
Euro 6b (NEFZ)
190 g/km (NEFZ)
CO2 Emissions
136 g/km (NEFZ)

Practical Convenience

ALPINA B4 S Bi-Turbo Cabrio
BMW 420i Cabrio
2
Doors
2
4
No. of Seats
4
385 kg
Maximum Payload
395 kg
370 L
Boot Capacity
370 L
No data
Boot Capacity (Seats Down)
No data