The Comparative Analysis :

ALPINA B4 S Bi-Turbo Convertible Edition 99 Switch-Tronic (18 - 19) vs. BMW 420i Convertible (17 - 18)

€ 96,100
ALPINA B4 S Bi-Turbo Convertible Edition 99 Switch-Tronic (18 - 19) ALPINA B4 S Bi-Turbo Cabrio
€ 48,500
 BMW 420i Convertible (17 - 18) BMW 420i Cabrio
€ 96,100
Base Price ⓘBase price of a new vehicle with standard equipment in Germany at market launch.
€ 48,500

ⓘ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 ALPINA B4 S Bi-Turbo Cabrio is 0.1 inches longer and 0.2 inches lower.
ALPINA B4 S Bi-Turbo Cabrio
BMW 420i Cabrio
54.3
Blueprint ALPINA B4 S Bi-Turbo Convertible Edition 99 Switch-Tronic (18 - 19)
71.9
79.7
54.5
Blueprint BMW 420i Convertible (17 - 18)
71.9
79.4
71.9 in
Width
71.9 in
79.7 in
Width Incl. Mirrors
79.4 in
54.3 in
Height
54.5 in
Blueprint ALPINA B4 S Bi-Turbo Convertible Edition 99 Switch-Tronic (18 - 19)
110.6
182.7
Blueprint BMW 420i Convertible (17 - 18)
110.6
182.6
182.7 in
Length
182.6 in
110.6 in
Wheelbase
110.6 in

Vehicle Weight

ALPINA B4 S Bi-Turbo Cabrio
BMW 420i Cabrio
4222 lb
Curb Weight
3913 lb
5071 lb
Gross Vehicle
Weight
4784 lb
ALPINA B4 S Bi-Turbo Convertible Edition 99 Switch-Tronic (18 - 19)
Weight Difference:
309 lb
7.32 %
BMW 420i Convertible (17 - 18)

General

ALPINA B4 S Bi-Turbo Cabrio
BMW 420i Cabrio
F33
Generation
F33
Convertible
Car Body Style
Convertible
Premium Unleaded
Fuel Type
Premium Unleaded
Rear-wheel drive
Drivetrain
Rear-wheel drive
8-speed automatic transmission
Transmission
6-speed manual transmission

Engine

ALPINA B4 S Bi-Turbo Cabrio
BMW 420i Cabrio
Straight-six gasoline engine with two tur­bo­chargers (bi­turbo)
Engine Type
Straight-four gasoline engine with tur­bo­charger
Engine Series
BMW B48
N55-B30
Engine Code
B48-B20
4
Valves
4
6
Cylinders
4
3 L / 147 cu in
Displacement
2 L / 98 cu in
446 hp
at 5500 rpm
Power
181 hp
at 5000 rpm
ALPINA B4 S Bi-Turbo Cabrio
446 hp
181 hp
BMW 420i Cabrio
502 lb‑ft
at 3000 rpm
Max. Torque
199 lb‑ft
at 1350 rpm
ALPINA B4 S Bi-Turbo Cabrio
502 lb‑ft
199 lb‑ft
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
8.2 sec
62 mph 62
mph

197 ft
0.000 sec

ALPINA B4 S Bi-Turbo Cabrio

62 mph 62
mph

374 ft
0.000 sec

BMW 420i Cabrio

▶ REPLAY
9.47 lb/hp
Weight-to-Power Ratio
21.62 lb/hp
ALPINA B4 S Bi-Turbo Cabrio
9.47 lb/hp
21.62 lb/hp
BMW 420i Cabrio

Fuel Economy / Emissions

ALPINA B4 S Bi-Turbo Cabrio
BMW 420i Cabrio
Fuel Economy
26 mpg
combined
38 mpg
ALPINA B4 S Bi-Turbo Cabrio
26 mpg
38 mpg
BMW 420i Cabrio
19 mpg
city
29 mpg
No data
highway
No data
Kraftstoffanzeige
15.9 gal
Fuel Tank Capacity
15.9 gal
Kraftstoffanzeige
409 mi
Range
601 mi
ALPINA B4 S Bi-Turbo Cabrio
409 mi
601 mi
BMW 420i Cabrio
Environmental Impact
172.4 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).
117.5 kWh
ALPINA B4 S Bi-Turbo Cabrio
172.4 kWh
117.5 kWh
BMW 420i Cabrio
Euro 6d-TEMP-EVAP (WLTP)
Emission Standard
Euro 6b (NEFZ)
333 g/mi (NEFZ)
CO2 Emissions
233 g/mi (NEFZ)

Practical Convenience

ALPINA B4 S Bi-Turbo Cabrio
BMW 420i Cabrio
2
Doors
2
4
No. of Seats
4
849 lb
Maximum Payload
871 lb
10.5 cu ft
Trunk Volume
10.5 cu ft
No data
Cargo Volume (Seats Down)
No data