The Comparative Analysis :

ALPINA B3 S Bi-Turbo Convertible Switch-Tronic (10 - 13) vs. BMW 420i Convertible (16 - 17)

€ 70,600
ALPINA B3 S Bi-Turbo Convertible Switch-Tronic (10 - 13) ALPINA B3 S Bi-Turbo Convertible
€ 44,700
 BMW 420i Convertible (16 - 17) BMW 420i Cabrio
€ 70,600
Base Price ⓘBase price of a new vehicle with standard equipment in Germany at market launch.
€ 44,700

ⓘ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 ALPINA B3 S Bi-Turbo Convertible is 0.6 inches shorter and 1.7 inches narrower.
ALPINA B3 S Bi-Turbo Convertible
BMW 420i Cabrio
54.5
Blueprint ALPINA B3 S Bi-Turbo Convertible Switch-Tronic (10 - 13)
70.2
78
54.5
Blueprint BMW 420i Convertible (16 - 17)
71.9
79.4
70.2 in
Width
71.9 in
78 in
Width Incl. Mirrors
79.4 in
54.5 in
Height
54.5 in
Blueprint ALPINA B3 S Bi-Turbo Convertible Switch-Tronic (10 - 13)
108.7
182
Blueprint BMW 420i Convertible (16 - 17)
110.6
182.6
182 in
Length
182.6 in
108.7 in
Wheelbase
110.6 in

Vehicle Weight

ALPINA B3 S Bi-Turbo Convertible
BMW 420i Cabrio
4068 lb
Curb Weight
3913 lb
4806 lb
Gross Vehicle
Weight
4784 lb
ALPINA B3 S Bi-Turbo Convertible Switch-Tronic (10 - 13)
Weight Difference:
154 lb
3.79 %
BMW 420i Convertible (16 - 17)

General

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

Engine

ALPINA B3 S Bi-Turbo Convertible
BMW 420i Cabrio
Straight-six gasoline engine with two tur­bo­chargers (bi­turbo)
Engine Type
Straight-four gasoline engine with tur­bo­charger
Engine Series
BMW B48
N54-K30
Engine Code
B48-B20
4
Valves
4
6
Cylinders
4
3 L / 147 cu in
Displacement
2 L / 98 cu in
395 hp
at 6000 rpm
Power
181 hp
at 5000 rpm
ALPINA B3 S Bi-Turbo Convertible
395 hp
181 hp
BMW 420i Cabrio
398 lb‑ft
at 4500 rpm
Max. Torque
199 lb‑ft
at 1350 rpm
ALPINA B3 S Bi-Turbo Convertible
398 lb‑ft
199 lb‑ft
BMW 420i Cabrio

Performance

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

223 ft
0.000 sec

ALPINA B3 S Bi-Turbo Convertible

62 mph 62
mph

374 ft
0.000 sec

BMW 420i Cabrio

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

Fuel Economy / Emissions

ALPINA B3 S Bi-Turbo Convertible
BMW 420i Cabrio
Fuel Economy
24 mpg
combined
38 mpg
ALPINA B3 S Bi-Turbo Convertible
24 mpg
38 mpg
BMW 420i Cabrio
17 mpg
city
29 mpg
No data
highway
No data
Kraftstoffanzeige
16.6 gal
Fuel Tank Capacity
15.9 gal
Kraftstoffanzeige
403 mi
Range
601 mi
ALPINA B3 S Bi-Turbo Convertible
403 mi
601 mi
BMW 420i Cabrio
Environmental Impact
183.8 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).
117.5 kWh
ALPINA B3 S Bi-Turbo Convertible
183.8 kWh
117.5 kWh
BMW 420i Cabrio
Euro 5
Emission Standard
Euro 6b (NEFZ)
362 g/mi (NEFZ)
CO2 Emissions
233 g/mi (NEFZ)

Practical Convenience

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