The Comparative Analysis :

BMW 420d Convertible Steptronic (14 - 15) vs. ALPINA B3 S Bi-Turbo Convertible Switch-Tronic (10 - 13)

€ 48,500
BMW 420d Convertible Steptronic (14 - 15) BMW 420d Cabrio
€ 70,600
 ALPINA B3 S Bi-Turbo Convertible Switch-Tronic (10 - 13) ALPINA B3 S Bi-Turbo Convertible
€ 48,500
Base Price ⓘBase price of a new vehicle with standard equipment in Germany at market launch.
€ 70,600

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

Vehicle Dimensions

The dimensions of these vehicles differ a little. Both cars are the same height, but the BMW 420d Cabrio is 0.6 inches longer and 1.7 inches wider.
BMW 420d Cabrio
ALPINA B3 S Bi-Turbo Convertible
54.5
Blueprint BMW 420d Convertible Steptronic (14 - 15)
71.9
79.4
54.5
Blueprint ALPINA B3 S Bi-Turbo Convertible Switch-Tronic (10 - 13)
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 Steptronic (14 - 15)
110.6
182.6
Blueprint ALPINA B3 S Bi-Turbo Convertible Switch-Tronic (10 - 13)
108.7
182
182.6 in
Length
182 in
110.6 in
Wheelbase
108.7 in

Vehicle Weight

BMW 420d Cabrio
ALPINA B3 S Bi-Turbo Convertible
3869 lb
Curb Weight
4068 lb
4762 lb
Gross Vehicle
Weight
4806 lb
BMW 420d Convertible Steptronic (14 - 15)
Weight Difference:
198 lb
4.87 %
ALPINA B3 S Bi-Turbo Convertible Switch-Tronic (10 - 13)

General

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

Engine

BMW 420d Cabrio
ALPINA B3 S Bi-Turbo Convertible
Straight-four diesel engine with tur­bo­charger
Engine Type
Straight-six gasoline engine with two tur­bo­chargers (bi­turbo)
BMW N47
Engine Series
N47-D20
Engine Code
N54-K30
4
Valves
4
4
Cylinders
6
2 L / 98 cu in
Displacement
3 L / 147 cu in
181 hp
at 4000 rpm
Power
395 hp
at 6000 rpm
BMW 420d Cabrio
181 hp
395 hp
ALPINA B3 S Bi-Turbo Convertible
280 lb‑ft
at 1750 rpm
Max. Torque
398 lb‑ft
at 4500 rpm
BMW 420d Cabrio
280 lb‑ft
398 lb‑ft
ALPINA B3 S Bi-Turbo Convertible

Performance

BMW 420d Cabrio
ALPINA B3 S Bi-Turbo Convertible
142 mph
Maximum Speed
185 mph
8.2 sec
Acceleration 0 to 62 mph
4.9 sec
62 mph 62
mph

374 ft
0.000 sec

BMW 420d Cabrio

62 mph 62
mph

223 ft
0.000 sec

ALPINA B3 S Bi-Turbo Convertible

▶ REPLAY
21.38 lb/hp
Weight-to-Power Ratio
10.3 lb/hp
BMW 420d Cabrio
21.38 lb/hp
10.3 lb/hp
ALPINA B3 S Bi-Turbo Convertible

Fuel Economy / Emissions

BMW 420d Cabrio
ALPINA B3 S Bi-Turbo Convertible
Fuel Economy
49 mpg
combined
24 mpg
BMW 420d Cabrio
49 mpg
24 mpg
ALPINA B3 S Bi-Turbo Convertible
41 mpg
city
17 mpg
No data
highway
No data
Kraftstoffanzeige
15.1 gal
Fuel Tank Capacity
16.6 gal
Kraftstoffanzeige
738 mi
Range
403 mi
BMW 420d Cabrio
738 mi
403 mi
ALPINA B3 S Bi-Turbo Convertible
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).
183.8 kWh
BMW 420d Cabrio
98.8 kWh
183.8 kWh
ALPINA B3 S Bi-Turbo Convertible
Euro 6b (NEFZ)
Emission Standard
Euro 5
204 g/mi (NEFZ)
CO2 Emissions
362 g/mi (NEFZ)

Practical Convenience

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