The Comparative Analysis :
Mercedes SLK 55 AMG Black Series 7G-TRONIC (06 - 08) vs. BMW 420i Coupé xDrive Steptronic (16 - 17)
€ 107,300
![Mercedes SLK 55 AMG Black Series 7G-TRONIC (06 - 08)](graphbase/cars/cars_big_png/Mercedes_SLK_55_AMG_black_R171.png)
€ 42,200
![BMW 420i Coupé xDrive Steptronic (16 - 17)](graphbase/cars/cars_big/BMW_4er_F32.webp)
€ 107,300
Base Price ⓘBase price of a new vehicle with standard equipment in Germany at market launch.
€ 42,200
ⓘBase price of a new vehicle with standard equipment in Germany at market launch. Price Info
Vehicle Dimensions
The Mercedes SLK 55 AMG Black Series is significantly smaller in every dimension. It's 21.7 inches shorter, 1.2 inches narrower and 4.8 inches lower than the BMW 420i Coupé.
Mercedes SLK 55 AMG Black Series
BMW 420i Coupé
50
70.6
78.5
54.8
71.9
79.4
70.6 in
Width
71.9 in
78.5 in
Width Incl. Mirrors
79.4 in
50 in
Height
54.8 in
95.7
160.9
110.6
182.6
160.9 in
Length
182.6 in
95.7 in
Wheelbase
110.6 in
Vehicle Weight
Mercedes SLK 55 AMG Black Series
BMW 420i Coupé
3296 lb
Curb Weight
3627 lb
3946 lb
Gross Vehicle
Weight
Weight
4608 lb
![Mercedes SLK 55 AMG Black Series 7G-TRONIC (06 - 08)](graphbase/cars/cars_big_png/Mercedes_SLK_55_AMG_black_R171.png)
Weight Difference:
331 lb
9.13 %
![BMW 420i Coupé xDrive Steptronic (16 - 17)](graphbase/cars/cars_big_png/BMW_4er_F32.png)
General
Mercedes SLK 55 AMG Black Series
BMW 420i Coupé
R171
Generation
F32
Coupe
Car Body Style
Coupe
Premium Unleaded
Fuel Type
Premium Unleaded
![](graphbase/drivetrain/RWD.png)
Rear-wheel drive
Drivetrain
Permanent all-wheel drive (AWD)
![](graphbase/drivetrain/AWD.png)
7-speed automatic transmission
Transmission
8-speed automatic transmission
Engine
Mercedes SLK 55 AMG Black Series
BMW 420i Coupé
V8 gasoline engine (naturally aspirated engine)
Engine Type
Straight-four gasoline engine with turbocharger
Mercedes-Benz M 113
Engine Series
BMW B48
M 113.989
Engine Code
B48-B20
![](graphbase/engines/Mercedes-Benz_M_113.png)
![](graphbase/engines/BMW_B48.png)
3
Valves
4
8
Cylinders
4
5.4 L / 264 cu in
Displacement
2 L / 98 cu in
395 hp
at 5750 rpm
Power
181 hp
at 5000 rpm
Mercedes SLK 55 AMG Black Series
395 hp
181 hp
BMW 420i Coupé
384 lb‑ft
at 3750 rpm
Max. Torque
199 lb‑ft
at 1350 rpm
Mercedes SLK 55 AMG Black Series
384 lb‑ft
199 lb‑ft
BMW 420i Coupé
Performance
Mercedes SLK 55 AMG Black Series
BMW 420i Coupé
174 mph
Maximum Speed
144 mph
4.5 sec
Acceleration 0 to 62 mph
7.8 sec
62 mph
62
mph
mph
207 ft
0.000 sec
![](graphbase/cars/cars_small_png/Mercedes_SLK_55_AMG_black_R171.png)
Mercedes SLK 55 AMG Black Series
62 mph
62
mph
mph
354 ft
0.000 sec
![](graphbase/cars/cars_small_png/BMW_4er_F32.png)
BMW 420i Coupé
▶ REPLAY
8.34 lb/hp
Weight-to-Power Ratio
20.04 lb/hp
Mercedes SLK 55 AMG Black Series
8.34 lb/hp
20.04 lb/hp
BMW 420i Coupé
Fuel Economy / Emissions
Mercedes SLK 55 AMG Black Series
BMW 420i Coupé
Fuel Economy
19 mpg
combined
40 mpg
Mercedes SLK 55 AMG Black Series
19 mpg
40 mpg
BMW 420i Coupé
13 mpg
city
31 mpg
27 mpg
highway
No data
18.5 gal
Fuel Tank Capacity
15.9 gal
357 mi
Range
632 mi
Mercedes SLK 55 AMG Black Series
357 mi
632 mi
BMW 420i Coupé
Environmental Impact
231.1 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).
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).
111.8 kWh
Mercedes SLK 55 AMG Black Series
231.1 kWh
111.8 kWh
BMW 420i Coupé
Euro 4
Emission Standard
Euro 6b (NEFZ)
472 g/mi (NEFZ)
CO2 Emissions
220 g/mi (NEFZ)
Practical Convenience
Mercedes SLK 55 AMG Black Series
BMW 420i Coupé
2
Doors
2
2
No. of Seats
4
650 lb
Maximum Payload
981 lb
8.5 cu ft
Trunk Volume
12.6 cu ft
![](graphbase/koffer/KL.png)
![](graphbase/koffer/KL.png)
![](graphbase/koffer/KS.png)
![](graphbase/koffer/KB.png)
![](graphbase/koffer/KL.png)
![](graphbase/koffer/KL.png)
![](graphbase/koffer/KL.png)
![](graphbase/koffer/KM.png)
No data
Cargo Volume (Seats Down)
No data