The Comparative Analysis :

BMW 420d Convertible (17 - 19) vs. ALPINA B3 Bi-Turbo Convertible Switch-Tronic (07 - 10)

€ 51,700
BMW 420d Convertible (17 - 19) BMW 420d Cabrio
€ 67,800
 ALPINA B3 Bi-Turbo Convertible Switch-Tronic (07 - 10) ALPINA B3 Bi-Turbo Convertible
€ 51,700
Base Price ⓘBase price of a new vehicle with standard equipment in Germany at market launch.
€ 67,800

ⓘBase price of a new vehicle with standard equipment in Germany at market launch. Price Info

Vehicle Dimensions

The dimensions of these vehicles differ slightly. Both cars are the same height, but the BMW 420d Cabrio is 2.3 inches longer and 1.7 inches wider.
BMW 420d Cabrio
ALPINA B3 Bi-Turbo Convertible
54.5
Blueprint BMW 420d Convertible (17 - 19)
71.9
79.4
54.5
Blueprint ALPINA B3 Bi-Turbo Convertible Switch-Tronic (07 - 10)
70.2
78
71.9 in
Width
70.2 in
79.4 in
Width Incl. Mirrors
78 in
54.5 in
Height
54.5 in
Blueprint BMW 420d Convertible (17 - 19)
110.6
182.6
Blueprint ALPINA B3 Bi-Turbo Convertible Switch-Tronic (07 - 10)
108.7
180.3
182.6 in
Length
180.3 in
110.6 in
Wheelbase
108.7 in

Vehicle Weight

BMW 420d Cabrio
ALPINA B3 Bi-Turbo Convertible
4023 lb
Curb Weight
4068 lb
4883 lb
Gross Vehicle
Weight
4850 lb
BMW 420d Convertible (17 - 19)
Weight Difference:
44 lb
1.08 %
ALPINA B3 Bi-Turbo Convertible Switch-Tronic (07 - 10)

General

BMW 420d Cabrio
ALPINA B3 Bi-Turbo Convertible
F33
Generation
E93
Convertible
Car Body Style
Convertible
Diesel
Fuel Type
Premium Unleaded
Rear-wheel drive
Drivetrain
Rear-wheel drive
6-speed manual transmission
Transmission
6-speed automatic transmission

Engine

BMW 420d Cabrio
ALPINA B3 Bi-Turbo Convertible
Straight-four diesel engine with tur­bo­charger
Engine Type
Straight-six gasoline engine with two tur­bo­chargers (bi­turbo)
BMW B47
Engine Series
B47-D20
Engine Code
N54-K20
4
Valves
4
4
Cylinders
6
2 L / 98 cu in
Displacement
3 L / 147 cu in
187 hp
at 4000 rpm
Power
355 hp
at 5500 rpm
BMW 420d Cabrio
187 hp
355 hp
ALPINA B3 Bi-Turbo Convertible
295 lb‑ft
at 1750 rpm
Max. Torque
369 lb‑ft
at 3800 rpm
BMW 420d Cabrio
295 lb‑ft
369 lb‑ft
ALPINA B3 Bi-Turbo Convertible

Performance

BMW 420d Cabrio
ALPINA B3 Bi-Turbo Convertible
146 mph
Maximum Speed
174 mph
8.2 sec
Acceleration 0 to 62 mph
5 sec
62 mph 62
mph

374 ft
0.000 sec

BMW 420d Cabrio

62 mph 62
mph

226 ft
0.000 sec

ALPINA B3 Bi-Turbo Convertible

▶ REPLAY
21.51 lb/hp
Weight-to-Power Ratio
11.46 lb/hp
BMW 420d Cabrio
21.51 lb/hp
11.46 lb/hp
ALPINA B3 Bi-Turbo Convertible

Fuel Economy / Emissions

BMW 420d Cabrio
ALPINA B3 Bi-Turbo Convertible
Fuel Economy
46 mpg
combined
24 mpg
BMW 420d Cabrio
46 mpg
24 mpg
ALPINA B3 Bi-Turbo Convertible
38 mpg
city
17 mpg
No data
highway
No data
Kraftstoffanzeige
15.1 gal
Fuel Tank Capacity
16.6 gal
Kraftstoffanzeige
695 mi
Range
403 mi
BMW 420d Cabrio
695 mi
403 mi
ALPINA B3 Bi-Turbo Convertible
Environmental Impact
104.9 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).
183.8 kWh
BMW 420d Cabrio
104.9 kWh
183.8 kWh
ALPINA B3 Bi-Turbo Convertible
Euro 6c (WLTP)
Emission Standard
Euro 4
248 g/mi (WLTP)
CO2 Emissions
381 g/mi (NEFZ)

Practical Convenience

BMW 420d Cabrio
ALPINA B3 Bi-Turbo Convertible
2
Doors
2
4
No. of Seats
4
860 lb
Maximum Payload
783 lb
10.5 cu ft
Trunk Volume
9.9 cu ft
No data
Cargo Volume (Seats Down)
No data