The Comparative Analysis :

ALPINA D4 Bi-Turbo Convertible Switch-Tronic (17 - 18) vs. BMW 420i Convertible Steptronic (17 - ..)

€ 69,500
ALPINA D4 Bi-Turbo Convertible Switch-Tronic (17 - 18) ALPINA D4 Bi-Turbo Cabrio
€ 50,800
 BMW 420i Convertible Steptronic (17 - ..) BMW 420i Cabrio
€ 69,500
Base Price ⓘBase price of a new vehicle with standard equipment in Germany at market launch.
€ 50,800

ⓘ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 D4 Bi-Turbo Cabrio is 0.1 inches longer and 0.2 inches lower.
ALPINA D4 Bi-Turbo Cabrio
BMW 420i Cabrio
54.3
Blueprint ALPINA D4 Bi-Turbo Convertible Switch-Tronic (17 - 18)
71.9
79.7
54.5
Blueprint BMW 420i Convertible Steptronic (17 - ..)
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 D4 Bi-Turbo Convertible Switch-Tronic (17 - 18)
110.6
182.7
Blueprint BMW 420i Convertible Steptronic (17 - ..)
110.6
182.6
182.7 in
Length
182.6 in
110.6 in
Wheelbase
110.6 in

Vehicle Weight

ALPINA D4 Bi-Turbo Cabrio
BMW 420i Cabrio
4167 lb
Curb Weight
3946 lb
4993 lb
Gross Vehicle
Weight
4817 lb
ALPINA D4 Bi-Turbo Convertible Switch-Tronic (17 - 18)
Weight Difference:
220 lb
5.28 %
BMW 420i Convertible Steptronic (17 - ..)

General

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

Engine

ALPINA D4 Bi-Turbo Cabrio
BMW 420i Cabrio
Straight-six diesel engine with two tur­bo­chargers (bi­turbo)
Engine Type
Straight-four gasoline engine with tur­bo­charger
Engine Series
BMW B48
N57-D30
Engine Code
B48-B20
4
Valves
4
6
Cylinders
4
3 L / 147 cu in
Displacement
2 L / 98 cu in
345 hp
at 4000 rpm
Power
181 hp
at 5000 rpm
ALPINA D4 Bi-Turbo Cabrio
345 hp
181 hp
BMW 420i Cabrio
516 lb‑ft
at 1500 rpm
Max. Torque
199 lb‑ft
at 1350 rpm
ALPINA D4 Bi-Turbo Cabrio
516 lb‑ft
199 lb‑ft
BMW 420i Cabrio

Performance

ALPINA D4 Bi-Turbo Cabrio
BMW 420i Cabrio
171 mph
Maximum Speed
143 mph
5 sec
Acceleration 0 to 62 mph
8.4 sec
62 mph 62
mph

226 ft
0.000 sec

ALPINA D4 Bi-Turbo Cabrio

62 mph 62
mph

384 ft
0.000 sec

BMW 420i Cabrio

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

Fuel Economy / Emissions

ALPINA D4 Bi-Turbo Cabrio
BMW 420i Cabrio
Fuel Economy
40 mpg
combined
37 mpg
ALPINA D4 Bi-Turbo Cabrio
40 mpg
37 mpg
BMW 420i Cabrio
36 mpg
city
32 mpg
No data
highway
No data
Kraftstoffanzeige
15.9 gal
Fuel Tank Capacity
15.9 gal
Kraftstoffanzeige
632 mi
Range
592 mi
ALPINA D4 Bi-Turbo Cabrio
632 mi
592 mi
BMW 420i Cabrio
Environmental Impact
121.3 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).
119.4 kWh
ALPINA D4 Bi-Turbo Cabrio
121.3 kWh
119.4 kWh
BMW 420i Cabrio
Euro 6b (NEFZ)
Emission Standard
Euro 6d-TEMP-EVAP-ISC (WLTP)
249 g/mi (NEFZ)
CO2 Emissions
288 g/mi (WLTP)

Practical Convenience

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