The Comparative Analysis :

ALPINA B4 S Bi-Turbo Convertible Switch-Tronic (18 - 19) vs. BMW 420d Convertible (14 - 15)

€ 81,400
ALPINA B4 S Bi-Turbo Convertible Switch-Tronic (18 - 19) ALPINA B4 S Bi-Turbo Cabrio
€ 46,300
 BMW 420d Convertible (14 - 15) BMW 420d Cabrio
€ 81,400
Base Price ⓘBase price of a new vehicle with standard equipment in Germany at market launch.
€ 46,300

ⓘ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 420d Cabrio
54.3
Blueprint ALPINA B4 S Bi-Turbo Convertible Switch-Tronic (18 - 19)
71.9
79.7
54.5
Blueprint BMW 420d Convertible (14 - 15)
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 Switch-Tronic (18 - 19)
110.6
182.7
Blueprint BMW 420d Convertible (14 - 15)
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 420d Cabrio
4222 lb
Curb Weight
3704 lb
5071 lb
Gross Vehicle
Weight
4740 lb
ALPINA B4 S Bi-Turbo Convertible Switch-Tronic (18 - 19)
Weight Difference:
518 lb
12.27 %
BMW 420d Convertible (14 - 15)

General

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

Engine

ALPINA B4 S Bi-Turbo Cabrio
BMW 420d Cabrio
Straight-six gasoline engine with two tur­bo­chargers (bi­turbo)
Engine Type
Straight-four diesel engine with tur­bo­charger
Engine Series
BMW N47
N55-B30
Engine Code
N47-D20
4
Valves
4
6
Cylinders
4
3 L / 147 cu in
Displacement
2 L / 98 cu in
434 hp
at 5500 rpm
Power
181 hp
at 4000 rpm
ALPINA B4 S Bi-Turbo Cabrio
434 hp
181 hp
BMW 420d Cabrio
487 lb‑ft
at 3000 rpm
Max. Torque
280 lb‑ft
at 1750 rpm
ALPINA B4 S Bi-Turbo Cabrio
487 lb‑ft
280 lb‑ft
BMW 420d Cabrio

Performance

ALPINA B4 S Bi-Turbo Cabrio
BMW 420d Cabrio
189 mph
Maximum Speed
146 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 420d Cabrio

▶ REPLAY
9.73 lb/hp
Weight-to-Power Ratio
20.46 lb/hp
ALPINA B4 S Bi-Turbo Cabrio
9.73 lb/hp
20.46 lb/hp
BMW 420d Cabrio

Fuel Economy / Emissions

ALPINA B4 S Bi-Turbo Cabrio
BMW 420d Cabrio
Fuel Economy
26 mpg
combined
46 mpg
ALPINA B4 S Bi-Turbo Cabrio
26 mpg
46 mpg
BMW 420d Cabrio
19 mpg
city
39 mpg
No data
highway
No data
Kraftstoffanzeige
15.9 gal
Fuel Tank Capacity
15.1 gal
Kraftstoffanzeige
409 mi
Range
695 mi
ALPINA B4 S Bi-Turbo Cabrio
409 mi
695 mi
BMW 420d 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).
104.9 kWh
ALPINA B4 S Bi-Turbo Cabrio
172.4 kWh
104.9 kWh
BMW 420d Cabrio
Euro 6d-TEMP (WLTP)
Emission Standard
Euro 6b (NEFZ)
333 g/mi (NEFZ)
CO2 Emissions
214 g/mi (NEFZ)

Practical Convenience

ALPINA B4 S Bi-Turbo Cabrio
BMW 420d Cabrio
2
Doors
2
4
No. of Seats
4
849 lb
Maximum Payload
1036 lb
10.5 cu ft
Trunk Volume
10.5 cu ft
No data
Cargo Volume (Seats Down)
No data