The Comparative Analysis :

BMW 428i Convertible Steptronic (14 - 15) vs. ALPINA D4 Bi-Turbo Convertible Switch-Tronic (17 - 18)

€ 50,400
BMW 428i Convertible Steptronic (14 - 15) BMW 428i Cabrio
€ 69,500
 ALPINA D4 Bi-Turbo Convertible Switch-Tronic (17 - 18) ALPINA D4 Bi-Turbo Cabrio
€ 50,400
Base Price ⓘBase price of a new vehicle with standard equipment in Germany at market launch.
€ 69,500

ⓘ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 BMW 428i Cabrio is 0.1 inches shorter and 0.2 inches taller.
BMW 428i Cabrio
ALPINA D4 Bi-Turbo Cabrio
54.5
Blueprint BMW 428i Convertible Steptronic (14 - 15)
71.9
79.4
54.3
Blueprint ALPINA D4 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 428i Convertible Steptronic (14 - 15)
110.6
182.6
Blueprint ALPINA D4 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 428i Cabrio
ALPINA D4 Bi-Turbo Cabrio
3913 lb
Curb Weight
4167 lb
4762 lb
Gross Vehicle
Weight
4993 lb
BMW 428i Convertible Steptronic (14 - 15)
Weight Difference:
254 lb
6.1 %
ALPINA D4 Bi-Turbo Convertible Switch-Tronic (17 - 18)

General

BMW 428i 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
8-speed automatic transmission
Transmission
8-speed automatic transmission

Engine

BMW 428i Cabrio
ALPINA D4 Bi-Turbo Cabrio
Straight-four gasoline engine with tur­bo­charger
Engine Type
Straight-six diesel engine with two tur­bo­chargers (bi­turbo)
BMW N20
Engine Series
N20-B20
Engine Code
N57-D30
4
Valves
4
4
Cylinders
6
2 L / 98 cu in
Displacement
3 L / 147 cu in
242 hp
at 5000 rpm
Power
345 hp
at 4000 rpm
BMW 428i Cabrio
242 hp
345 hp
ALPINA D4 Bi-Turbo Cabrio
258 lb‑ft
at 1250 rpm
Max. Torque
516 lb‑ft
at 1500 rpm
BMW 428i Cabrio
258 lb‑ft
516 lb‑ft
ALPINA D4 Bi-Turbo Cabrio

Performance

BMW 428i Cabrio
ALPINA D4 Bi-Turbo Cabrio
155 mph
Maximum Speed
171 mph
6.4 sec
Acceleration 0 to 62 mph
5 sec
62 mph 62
mph

292 ft
0.000 sec

BMW 428i Cabrio

62 mph 62
mph

226 ft
0.000 sec

ALPINA D4 Bi-Turbo Cabrio

▶ REPLAY
16.17 lb/hp
Weight-to-Power Ratio
12.08 lb/hp
BMW 428i Cabrio
16.17 lb/hp
12.08 lb/hp
ALPINA D4 Bi-Turbo Cabrio

Fuel Economy / Emissions

BMW 428i Cabrio
ALPINA D4 Bi-Turbo Cabrio
Fuel Economy
36 mpg
combined
40 mpg
BMW 428i Cabrio
36 mpg
40 mpg
ALPINA D4 Bi-Turbo Cabrio
27 mpg
city
36 mpg
No data
highway
No data
Kraftstoffanzeige
15.9 gal
Fuel Tank Capacity
15.9 gal
Kraftstoffanzeige
565 mi
Range
632 mi
BMW 428i Cabrio
565 mi
632 mi
ALPINA D4 Bi-Turbo Cabrio
Environmental Impact
125 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 428i Cabrio
125 kWh
121.3 kWh
ALPINA D4 Bi-Turbo Cabrio
Euro 6b (NEFZ)
Emission Standard
Euro 6b (NEFZ)
248 g/mi (NEFZ)
CO2 Emissions
249 g/mi (NEFZ)

Practical Convenience

BMW 428i Cabrio
ALPINA D4 Bi-Turbo Cabrio
2
Doors
2
4
No. of Seats
4
849 lb
Maximum Payload
827 lb
10.5 cu ft
Trunk Volume
10.5 cu ft
No data
Cargo Volume (Seats Down)
No data