The Comparative Analysis :

BMW 420i Coupé Steptronic (13 - 16) vs. ALPINA B4 Bi-Turbo Coupé Switch-Tronic (14 - 17)

€ 38,900
BMW 420i Coupé Steptronic (13 - 16) BMW 420i Coupé
€ 69,800
 ALPINA B4 Bi-Turbo Coupé Switch-Tronic (14 - 17) ALPINA B4 Bi-Turbo Coupé
€ 38,900
Base Price ⓘBase price of a new vehicle with standard equipment in Germany at market launch.
€ 69,800

ⓘ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 BMW 420i Coupé is 0.1 inches shorter and 0.2 inches taller.
BMW 420i Coupé
ALPINA B4 Bi-Turbo Coupé
54.2
Blueprint BMW 420i Coupé Steptronic (13 - 16)
71.9
79.4
54.1
Blueprint ALPINA B4 Bi-Turbo Coupé Switch-Tronic (14 - 17)
71.9
79.7
71.9 in
Width
71.9 in
79.4 in
Width Incl. Mirrors
79.7 in
54.2 in
Height
54.1 in
Blueprint BMW 420i Coupé Steptronic (13 - 16)
110.6
182.6
Blueprint ALPINA B4 Bi-Turbo Coupé Switch-Tronic (14 - 17)
110.6
182.7
182.6 in
Length
182.7 in
110.6 in
Wheelbase
110.6 in

Vehicle Weight

BMW 420i Coupé
ALPINA B4 Bi-Turbo Coupé
3362 lb
Curb Weight
3726 lb
4343 lb
Gross Vehicle
Weight
4707 lb
BMW 420i Coupé Steptronic (13 - 16)
Weight Difference:
364 lb
9.77 %
ALPINA B4 Bi-Turbo Coupé Switch-Tronic (14 - 17)

General

BMW 420i Coupé
ALPINA B4 Bi-Turbo Coupé
F32
Generation
F32
Coupe
Car Body Style
Coupe
Premium Unleaded
Fuel Type
Premium Unleaded
Rear-wheel drive
Drivetrain
Rear-wheel drive
8-speed automatic transmission
Transmission
8-speed automatic transmission

Engine

BMW 420i Coupé
ALPINA B4 Bi-Turbo Coupé
Straight-four gasoline engine with tur­bo­charger
Engine Type
Straight-six gasoline engine with two tur­bo­chargers (bi­turbo)
BMW N20
Engine Series
N20-B20
Engine Code
N55-R20
4
Valves
4
4
Cylinders
6
2 L / 98 cu in
Displacement
3 L / 147 cu in
181 hp
at 5000 rpm
Power
404 hp
at 5500 rpm
BMW 420i Coupé
181 hp
404 hp
ALPINA B4 Bi-Turbo Coupé
199 lb‑ft
at 1250 rpm
Max. Torque
443 lb‑ft
at 3000 rpm
BMW 420i Coupé
199 lb‑ft
443 lb‑ft
ALPINA B4 Bi-Turbo Coupé

Performance

BMW 420i Coupé
ALPINA B4 Bi-Turbo Coupé
147 mph
Maximum Speed
188 mph
7.5 sec
Acceleration 0 to 62 mph
4.2 sec
62 mph 62
mph

341 ft
0.000 sec

BMW 420i Coupé

62 mph 62
mph

190 ft
0.000 sec

ALPINA B4 Bi-Turbo Coupé

▶ REPLAY
18.57 lb/hp
Weight-to-Power Ratio
9.22 lb/hp
BMW 420i Coupé
18.57 lb/hp
9.22 lb/hp
ALPINA B4 Bi-Turbo Coupé

Fuel Economy / Emissions

BMW 420i Coupé
ALPINA B4 Bi-Turbo Coupé
Fuel Economy
39 mpg
combined
31 mpg
BMW 420i Coupé
39 mpg
31 mpg
ALPINA B4 Bi-Turbo Coupé
29 mpg
city
23 mpg
No data
highway
No data
Kraftstoffanzeige
15.9 gal
Fuel Tank Capacity
15.9 gal
Kraftstoffanzeige
621 mi
Range
490 mi
BMW 420i Coupé
621 mi
490 mi
ALPINA B4 Bi-Turbo Coupé
Environmental Impact
113.6 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).
144 kWh
BMW 420i Coupé
113.6 kWh
144 kWh
ALPINA B4 Bi-Turbo Coupé
Euro 6b (NEFZ)
Emission Standard
Euro 6b (NEFZ)
224 g/mi (NEFZ)
CO2 Emissions
285 g/mi (NEFZ)

Practical Convenience

BMW 420i Coupé
ALPINA B4 Bi-Turbo Coupé
2
Doors
2
4
No. of Seats
4
981 lb
Maximum Payload
981 lb
12.6 cu ft
Trunk Volume
12.6 cu ft
No data
Cargo Volume (Seats Down)
No data