The Comparative Analysis :

BMW 420d Convertible (15 - 17) vs. ALPINA B4 S Bi-Turbo Convertible Switch-Tronic (17 - 18)

€ 47,900
BMW 420d Convertible (15 - 17) BMW 420d Cabrio
€ 81,400
 ALPINA B4 S Bi-Turbo Convertible Switch-Tronic (17 - 18) ALPINA B4 S Bi-Turbo Cabrio
€ 47,900
Base Price ⓘBase price of a new vehicle with standard equipment in Germany at market launch.
€ 81,400

ⓘ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 420d Cabrio is 0.1 inches shorter and 0.2 inches taller.
BMW 420d Cabrio
ALPINA B4 S Bi-Turbo Cabrio
54.5
Blueprint BMW 420d Convertible (15 - 17)
71.9
79.4
54.3
Blueprint ALPINA B4 S Bi-Turbo Convertible Switch-Tronic (17 - 18)
71.9
79.7
71.9 in
Width
71.9 in
79.4 in
Width Incl. Mirrors
79.7 in
54.5 in
Height
54.3 in
Blueprint BMW 420d Convertible (15 - 17)
110.6
182.6
Blueprint ALPINA B4 S Bi-Turbo Convertible Switch-Tronic (17 - 18)
110.6
182.7
182.6 in
Length
182.7 in
110.6 in
Wheelbase
110.6 in

Vehicle Weight

BMW 420d Cabrio
ALPINA B4 S Bi-Turbo Cabrio
3913 lb
Curb Weight
4222 lb
4784 lb
Gross Vehicle
Weight
5071 lb
BMW 420d Convertible (15 - 17)
Weight Difference:
309 lb
7.32 %
ALPINA B4 S Bi-Turbo Convertible Switch-Tronic (17 - 18)

General

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

Engine

BMW 420d Cabrio
ALPINA B4 S Bi-Turbo Cabrio
Straight-four diesel engine with tur­bo­charger
Engine Type
Straight-six gasoline engine with two tur­bo­chargers (bi­turbo)
BMW B47
Engine Series
B47-D20
Engine Code
N55-B30
4
Valves
4
4
Cylinders
6
2 L / 98 cu in
Displacement
3 L / 147 cu in
187 hp
at 4000 rpm
Power
434 hp
at 5500 rpm
BMW 420d Cabrio
187 hp
434 hp
ALPINA B4 S Bi-Turbo Cabrio
295 lb‑ft
at 1750 rpm
Max. Torque
487 lb‑ft
at 3000 rpm
BMW 420d Cabrio
295 lb‑ft
487 lb‑ft
ALPINA B4 S Bi-Turbo Cabrio

Performance

BMW 420d Cabrio
ALPINA B4 S Bi-Turbo Cabrio
146 mph
Maximum Speed
189 mph
8.1 sec
Acceleration 0 to 62 mph
4.3 sec
62 mph 62
mph

371 ft
0.000 sec

BMW 420d Cabrio

62 mph 62
mph

197 ft
0.000 sec

ALPINA B4 S Bi-Turbo Cabrio

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

Fuel Economy / Emissions

BMW 420d Cabrio
ALPINA B4 S Bi-Turbo Cabrio
Fuel Economy
49 mpg
combined
28 mpg
BMW 420d Cabrio
49 mpg
28 mpg
ALPINA B4 S Bi-Turbo Cabrio
41 mpg
city
21 mpg
No data
highway
No data
Kraftstoffanzeige
15.1 gal
Fuel Tank Capacity
15.9 gal
Kraftstoffanzeige
738 mi
Range
449 mi
BMW 420d Cabrio
738 mi
449 mi
ALPINA B4 S Bi-Turbo Cabrio
Environmental Impact
98.8 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).
157.2 kWh
BMW 420d Cabrio
98.8 kWh
157.2 kWh
ALPINA B4 S Bi-Turbo Cabrio
Euro 6b (NEFZ)
Emission Standard
Euro 6c (NEFZ)
204 g/mi (NEFZ)
CO2 Emissions
306 g/mi (NEFZ)

Practical Convenience

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