The Comparative Analysis :

BMW 428i Convertible xDrive Steptronic (14 - 15) vs. BMW 420i Convertible Steptronic (14 - 16)

€ 52,900
BMW 428i Convertible xDrive Steptronic (14 - 15) 428i Cabrio
€ 46,100
 BMW 420i Convertible Steptronic (14 - 16) 420i Cabrio
€ 52,900
Base Price ⓘBase price of a new vehicle with standard equipment in Germany at market launch.
€ 46,100

ⓘ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 length and width, but the 428i Cabrio is 0.6 inches taller.
428i Cabrio
420i Cabrio
55.1
Blueprint BMW 428i Convertible xDrive Steptronic (14 - 15)
71.9
79.4
54.5
Blueprint BMW 420i Convertible Steptronic (14 - 16)
71.9
79.4
71.9 in
Width
71.9 in
79.4 in
Width Incl. Mirrors
79.4 in
55.1 in
Height
54.5 in
Blueprint BMW 428i Convertible xDrive Steptronic (14 - 15)
110.6
182.6
Blueprint BMW 420i Convertible Steptronic (14 - 16)
110.6
182.6
182.6 in
Length
182.6 in
110.6 in
Wheelbase
110.6 in

Vehicle Weight

428i Cabrio
420i Cabrio
4068 lb
Curb Weight
3858 lb
4894 lb
Gross Vehicle
Weight
4729 lb
BMW 428i Convertible xDrive Steptronic (14 - 15)
Weight Difference:
209 lb
5.14 %
BMW 420i Convertible Steptronic (14 - 16)

General

428i Cabrio
420i Cabrio
F33
Generation
F33
Convertible
Car Body Style
Convertible
Premium Unleaded
Fuel Type
Premium Unleaded
Permanent all-wheel drive (AWD)
Drivetrain
Rear-wheel drive
8-speed automatic transmission
Transmission
8-speed automatic transmission

Engine

428i Cabrio
420i Cabrio
Straight-four gasoline engine with tur­bo­charger
Engine Type
Straight-four gasoline engine with tur­bo­charger
BMW N20
Engine Series
BMW N20
N20-B20
Engine Code
N20-B20
4
Valves
4
4
Cylinders
4
2 L / 98 cu in
Displacement
2 L / 98 cu in
242 hp
at 5000 rpm
Power
181 hp
at 5000 rpm
428i Cabrio
242 hp
181 hp
420i Cabrio
258 lb‑ft
at 1250 rpm
Max. Torque
199 lb‑ft
at 1250 rpm
428i Cabrio
258 lb‑ft
199 lb‑ft
420i Cabrio

Performance

428i Cabrio
420i Cabrio
155 mph
Maximum Speed
143 mph
6.5 sec
Acceleration 0 to 62 mph
8.3 sec
62 mph 62
mph

295 ft
0.000 sec

428i Cabrio

62 mph 62
mph

377 ft
0.000 sec

420i Cabrio

▶ REPLAY
16.81 lb/hp
Weight-to-Power Ratio
21.31 lb/hp
428i Cabrio
16.81 lb/hp
21.31 lb/hp
420i Cabrio

Fuel Economy / Emissions

428i Cabrio
420i Cabrio
Fuel Economy
34 mpg
combined
37 mpg
428i Cabrio
34 mpg
37 mpg
420i Cabrio
26 mpg
city
27 mpg
No data
highway
No data
Kraftstoffanzeige
15.9 gal
Fuel Tank Capacity
15.9 gal
Kraftstoffanzeige
533 mi
Range
583 mi
428i Cabrio
533 mi
583 mi
420i Cabrio
Environmental Impact
132.6 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).
121.2 kWh
428i Cabrio
132.6 kWh
121.2 kWh
420i Cabrio
Euro 6b (NEFZ)
Emission Standard
Euro 6b (NEFZ)
262 g/mi (NEFZ)
CO2 Emissions
240 g/mi (NEFZ)

Practical Convenience

428i Cabrio
420i Cabrio
2
Doors
2
4
No. of Seats
4
827 lb
Maximum Payload
871 lb
10.5 cu ft
Trunk Volume
10.5 cu ft
No data
Cargo Volume (Seats Down)
No data