The Comparative Analysis :

BMW 420i Convertible (16 - 17) vs. ALPINA D4 Bi-Turbo Convertible Switch-Tronic (14 - 17)

€ 44,700
BMW 420i Convertible (16 - 17) BMW 420i Cabrio
€ 65,700
 ALPINA D4 Bi-Turbo Convertible Switch-Tronic (14 - 17) ALPINA D4 Bi-Turbo Cabrio
€ 44,700
Base Price ⓘBase price of a new vehicle with standard equipment in Germany at market launch.
€ 65,700

ⓘ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 0.1 inches shorter and 0.2 inches taller.
BMW 420i Cabrio
ALPINA D4 Bi-Turbo Cabrio
54.5
Blueprint BMW 420i Convertible (16 - 17)
71.9
79.4
54.3
Blueprint ALPINA D4 Bi-Turbo Convertible Switch-Tronic (14 - 17)
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 420i Convertible (16 - 17)
110.6
182.6
Blueprint ALPINA D4 Bi-Turbo Convertible Switch-Tronic (14 - 17)
110.6
182.7
182.6 in
Length
182.7 in
110.6 in
Wheelbase
110.6 in

Vehicle Weight

BMW 420i Cabrio
ALPINA D4 Bi-Turbo Cabrio
3913 lb
Curb Weight
4167 lb
4784 lb
Gross Vehicle
Weight
4993 lb
BMW 420i Convertible (16 - 17)
Weight Difference:
254 lb
6.1 %
ALPINA D4 Bi-Turbo Convertible Switch-Tronic (14 - 17)

General

BMW 420i Cabrio
ALPINA D4 Bi-Turbo Cabrio
F33
Generation
F33
Convertible
Car Body Style
Convertible
Premium Unleaded
Fuel Type
Diesel
Rear-wheel drive
Drivetrain
Rear-wheel drive
6-speed manual transmission
Transmission
8-speed automatic transmission

Engine

BMW 420i Cabrio
ALPINA D4 Bi-Turbo Cabrio
Straight-four gasoline 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
2 L / 98 cu in
Displacement
3 L / 147 cu in
181 hp
at 5000 rpm
Power
345 hp
at 4000 rpm
BMW 420i Cabrio
181 hp
345 hp
ALPINA D4 Bi-Turbo Cabrio
199 lb‑ft
at 1350 rpm
Max. Torque
516 lb‑ft
at 1500 rpm
BMW 420i Cabrio
199 lb‑ft
516 lb‑ft
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

374 ft
0.000 sec

BMW 420i Cabrio

62 mph 62
mph

226 ft
0.000 sec

ALPINA D4 Bi-Turbo Cabrio

▶ REPLAY
21.62 lb/hp
Weight-to-Power Ratio
12.08 lb/hp
BMW 420i Cabrio
21.62 lb/hp
12.08 lb/hp
ALPINA D4 Bi-Turbo Cabrio

Fuel Economy / Emissions

BMW 420i Cabrio
ALPINA D4 Bi-Turbo Cabrio
Fuel Economy
38 mpg
combined
40 mpg
BMW 420i Cabrio
38 mpg
40 mpg
ALPINA D4 Bi-Turbo Cabrio
29 mpg
city
36 mpg
No data
highway
No data
Kraftstoffanzeige
15.9 gal
Fuel Tank Capacity
15.9 gal
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)
233 g/mi (NEFZ)
CO2 Emissions
251 g/mi (NEFZ)

Practical Convenience

BMW 420i Cabrio
ALPINA D4 Bi-Turbo Cabrio
2
Doors
2
4
No. of Seats
4
871 lb
Maximum Payload
827 lb
10.5 cu ft
Trunk Volume
10.5 cu ft
No data
Cargo Volume (Seats Down)
No data