Car comparison

Mercedes-Benz C-class (W205) · Facelift 2018 C 300dvsKia Optima IV · Facelift 2018 2.0 T-GDI

Compare specs, acceleration, fuel consumption, dimensions, practicality, and estimated running costs side by side.

New comparison

Mercedes-Benz C-class (W205) · Facelift 2018

C 300d

245 hp1950 ccDieselAWDAutomaticTurbochargedSedan2018-2021
VS

Kia Optima IV · Facelift 2018

2.0 T-GDI

238 hp1998 ccGasolineFWDAutomaticTurbochargedSedan2018-2020

Comparison overview

Use the estimates as comparison hints and verify exact figures before making decisions.

Best choices

Mercedes-Benz C-class (W205) Facelift 2018 C 300d

  • Quickest 0-100 km/h
    5.7 s
  • Fastest top speed
    260 km/h
    162 mph Unrestricted
    250 km/h
    155 mph Restricted
  • Most powerful
    245 hp
    183 kW
  • Highest torque
    500 Nm
    369 lb-ft
  • Lightest
    1,630 kg
    3,594 lb
  • Best power-to-weight
    150 hp/t
    112 kW/t
    6.7 kg/hp
  • Lowest combined fuel consumption
    5.7 L/100 km
    41.3 mpg US
    49.6 mpg UK
  • Lowest city consumption
    6.8 L/100 km
    34.6 mpg US
    41.5 mpg UK
  • Lowest highway consumption
    5.1 L/100 km
    46.1 mpg US
    55.4 mpg UK
  • Best overall score
    69/100
  • Best performance score
    65/100
  • Best economy score
    91/100
  • Best practicality score
    77/100

Specification comparison

Specification comparison
ModelMercedes-BenzC-class (W205)Facelift 2018C 300dKiaOptima IVFacelift 20182.0 T-GDI
Power
245hp183kW
238hp177kW
Torque
500Nm369lb-ft
353Nm260lb-ft
Curb weight
1,630kg3,594lb
1,680kg3,704lb
Gross weight
2,285kg5,038lb
2,120kg4,674lb
Top speed
Unrestricted
260 km/h162 mph
Restricted
250 km/h155 mph
Calculated
Unrestricted
250 km/h155 mph
Restricted
240 km/h149 mph
Calculated
To 99% top speed
57.5s99% target: 257 km/h / 160 mph
Calculated
73.0s99% target: 248 km/h / 154 mph
Calculated
0-100 km/h
5.7s
7.4s
0-200 km/h
17.7s
Calculated
24.4s
Calculated
0-60 mph
5.4s
Calculated
7.1s
Calculated
Fuel consumption
5.7L/100 km41.3mpg US49.6mpg UK
9.3L/100 km25.3mpg US30.4mpg UK
Fuel consumption city
6.8L/100 km34.6mpg US41.5mpg UK
13.2L/100 km17.8mpg US21.4mpg UK
Fuel consumption highway
5.1L/100 km46.1mpg US55.4mpg UK
7L/100 km33.6mpg US40.4mpg UK
Quarter mile
13.7s
Calculated
15.2s
Calculated
Power-to-weight
150hp/t112kW/t68hp/1000 lb
Calculated
142hp/t106kW/t64hp/1000 lb
Calculated
Torque-to-weight
307Nm/t205lb-ft/ton
Calculated
210Nm/t141lb-ft/ton
Calculated
Estimated range
719km447mi
Calculated
753km468mi
Calculated
Displacement
1,950cc119cu in
1,998cc122cu in
Length
4,686mm184in
4,855mm191in
Width
1,810mm71in
1,860mm73in
Height
1,442mm57in
1,475mm58in
Wheelbase
2,840mm112in
2,805mm110in
Front track
1,588mm63in
1,607mm63in
Rear track-
1,614mm64in
Ground clearance
92mm4in
-
Trunk volume-
510L
Doors
4
4
Seats
5
5
Fuel tank
41L
70L
CO2 emissions
151g/km
-

Performance charts

Use the estimates as comparison hints and verify exact figures before making decisions.

Dyno simulation

Estimated stock-style power and torque curves by engine speed.

Mercedes-Benz C-class (W205) Facelift 2018 C 300dKia Optima IV Facelift 2018 2.0 T-GDIPowerTorque
  • Mercedes-Benz C-class (W205) Facelift 2018 C 300d: Power / Torque
  • Kia Optima IV Facelift 2018 2.0 T-GDI: Power / Torque
Dyno simulation data table
VehiclePeak power RPMPeak torque RPMMax engine speed
Mercedes-BenzC-class (W205)Facelift 2018C 300d-1,600-2,400 rpm2,650 rpm
KiaOptima IVFacelift 20182.0 T-GDI6,000 rpm1,350-4,000 rpm6,250 rpm

Acceleration curve

Estimated speed over time for selected vehicles.

Acceleration and drag-race table
MetricMercedes-BenzC-class (W205)Facelift 2018C 300dKiaOptima IVFacelift 20182.0 T-GDI
Acceleration checkpoints
0-60 mph
0-97 km/h
5.4 s
7.1 s
0-100 km/h
0-62 mph
5.7 s
7.4 s
0-200 km/h
0-124 mph
17.7 s
24.4 s
Top speed
Unrestricted
260 km/h162 mph
Restricted
250 km/h155 mph
Likely limited
Unrestricted
250 km/h155 mph
Restricted
240 km/h149 mph
Likely limited
Drag race simulation
60 ft
18 m
2.5 s
2.8 s
330 ft
101 m
6.2 s
6.9 s
1/8 mile
201 m
9.1 s
10.2 s
1000 ft
305 m
11.6 s
12.9 s
1/4 mile
402 m
13.7 s
15.2 s
Trap speed
1/4 mile
402 m
177 km/h
110 mph
160 km/h
99 mph

Power comparison

Bar comparison chart for Power. Higher is better · hp / kW

Chart data table
VehicleValue
Mercedes-BenzC-class (W205)Facelift 2018C 300d
245 hp
183 kW
KiaOptima IVFacelift 20182.0 T-GDI
238 hp
177 kW

Mercedes-Benz C-class (W205) Facelift 2018 C 300d has 7 hp more than Kia Optima IV Facelift 2018 2.0 T-GDI.

The biggest power difference is between Kia Optima IV Facelift 2018 2.0 T-GDI and Mercedes-Benz C-class (W205) Facelift 2018 C 300d: 7 hp (5 kW).

Torque comparison

Bar comparison chart for Torque. Higher is better · Nm / lb-ft

Chart data table
VehicleValue
Mercedes-BenzC-class (W205)Facelift 2018C 300d
500 Nm
369 lb-ft
KiaOptima IVFacelift 20182.0 T-GDI
353 Nm
260 lb-ft

Curb weight comparison

Bar comparison chart for Curb weight. Lower is better · kg / lb

Chart data table
VehicleValue
Mercedes-BenzC-class (W205)Facelift 2018C 300d
1,630 kg
3,594 lb
KiaOptima IVFacelift 20182.0 T-GDI
1,680 kg
3,704 lb

Top speed without limiter comparison

Bar comparison chart for Top speed without limiter. Higher is better · km/h / mph

Chart data table
VehicleValue
Mercedes-BenzC-class (W205)Facelift 2018C 300d
Unrestricted
260 km/h162 mph
Restricted
250 km/h155 mph
KiaOptima IVFacelift 20182.0 T-GDI
Unrestricted
250 km/h155 mph
Restricted
240 km/h149 mph

0-100 km/h comparison

Bar comparison chart for 0-100 km/h. Lower is better · seconds

Chart data table
VehicleValue
Mercedes-BenzC-class (W205)Facelift 2018C 300d5.7 s
KiaOptima IVFacelift 20182.0 T-GDI7.4 s

The biggest 0-100 km/h difference is between Mercedes-Benz C-class (W205) Facelift 2018 C 300d and Kia Optima IV Facelift 2018 2.0 T-GDI: 1.7 s.

Fuel consumption comparison

Bar comparison chart for Fuel consumption. Lower is better · L/100 km / mpg US / mpg UK

Chart data table
VehicleValue
Mercedes-BenzC-class (W205)Facelift 2018C 300d
5.7 L/100 km
41.3 mpg US
49.6 mpg UK
KiaOptima IVFacelift 20182.0 T-GDI
9.3 L/100 km
25.3 mpg US
30.4 mpg UK

The biggest fuel consumption difference is between Mercedes-Benz C-class (W205) Facelift 2018 C 300d and Kia Optima IV Facelift 2018 2.0 T-GDI: 3.6 L/100 km.

Power-to-weight comparison

Bar comparison chart for Power-to-weight. Higher is better · hp/t / kW/t

Chart data table
VehicleValue
Mercedes-BenzC-class (W205)Facelift 2018C 300d
150 hp/t
112 kW/t
6.7 kg/hp
KiaOptima IVFacelift 20182.0 T-GDI
142 hp/t
106 kW/t
7.1 kg/hp

Estimated range comparison

Bar comparison chart for Estimated range. Higher is better · km / mi

Chart data table
VehicleValue
Mercedes-BenzC-class (W205)Facelift 2018C 300d
719 km
447 mi
KiaOptima IVFacelift 20182.0 T-GDI
753 km
468 mi

Performance spider chart

Radar chart comparing normalized performance and fuel-consumption scores.

Chart data table
VehiclePowerAccelerationTop speed
Mercedes-BenzC-class (W205)Facelift 2018C 300d
245 hp
183 kW
5.7 s
Unrestricted
260 km/h162 mph
Restricted
250 km/h155 mph
KiaOptima IVFacelift 20182.0 T-GDI
238 hp
177 kW
7.4 s
Unrestricted
250 km/h155 mph
Restricted
240 km/h149 mph

Most attractive quadrant

Scatter chart with performance score on the X axis and practicality score on the Y axis.

Chart data table
VehiclePerformance scorePracticality score
Mercedes-BenzC-class (W205)Facelift 2018C 300d
Power
245 hp
183 kW
0-100 km/h5.7 s
Top speed
Unrestricted
260 km/h162 mph
Restricted
250 km/h155 mph
Doors/seats
4 doors
5 seats
Trunk-
Length
4,686 mm
184.5 in
Height
1,442 mm
56.8 in
KiaOptima IVFacelift 20182.0 T-GDI
Power
238 hp
177 kW
0-100 km/h7.4 s
Top speed
Unrestricted
250 km/h155 mph
Restricted
240 km/h149 mph
Doors/seats
4 doors
5 seats
Trunk
510 L
18.0 cu ft
Length
4,855 mm
191.1 in
Height
1,475 mm
58.1 in

Performance vs fuel economy

Cars closer to the top-right corner combine stronger performance with better fuel economy scores.

Performance vs fuel economy data table
VehiclePerformance scoreFuel economy score
Mercedes-BenzC-class (W205)Facelift 2018C 300d
Power
245 hp
183 kW
0-100 km/h5.7 s
Top speed
Unrestricted
260 km/h162 mph
Restricted
250 km/h155 mph
5.7 L/100 km
41.3 mpg US
49.6 mpg UK
KiaOptima IVFacelift 20182.0 T-GDI
Power
238 hp
177 kW
0-100 km/h7.4 s
Top speed
Unrestricted
250 km/h155 mph
Restricted
240 km/h149 mph
9.3 L/100 km
25.3 mpg US
30.4 mpg UK

Mercedes-Benz C-class (W205) Facelift 2018 C 300d is closest to the top-right balance target for performance and fuel economy.

Acceleration vs fuel consumption

Cars closer to the lower-left corner offer a better mix of quick acceleration and low fuel consumption.

Acceleration vs fuel consumption data table
VehicleFuel consumption, L/100 km0-100 km/h, s
Mercedes-BenzC-class (W205)Facelift 2018C 300d
5.7 L/100 km
41.3 mpg US
49.6 mpg UK
5.7 s
KiaOptima IVFacelift 20182.0 T-GDI
9.3 L/100 km
25.3 mpg US
30.4 mpg UK
7.4 s

Power-to-weight vs fuel consumption

The shaded area favors higher power-to-weight with lower combined fuel consumption.

Power-to-weight vs fuel consumption data table
VehiclePower-to-weight, hp/tFuel consumption, L/100 km
Mercedes-BenzC-class (W205)Facelift 2018C 300d
150 hp/t
112 kW/t
6.7 kg/hp
5.7 L/100 km
41.3 mpg US
49.6 mpg UK
KiaOptima IVFacelift 20182.0 T-GDI
142 hp/t
106 kW/t
7.1 kg/hp
9.3 L/100 km
25.3 mpg US
30.4 mpg UK

Detailed score breakdown

Detailed score breakdown
VehicleMercedes-BenzC-class (W205)Facelift 2018C 300dKiaOptima IVFacelift 20182.0 T-GDI
Power
245 hp
183 kW
238 hp
177 kW
Torque
500 Nm
369 lb-ft
353 Nm
260 lb-ft
Acceleration
5.7 s
7.4 s
Top speed
Unrestricted
260 km/h162 mph
Restricted
250 km/h155 mph
Unrestricted
250 km/h155 mph
Restricted
240 km/h149 mph
Lightness
1,630 kg
3,594 lb
1,680 kg
3,704 lb
Fuel consumption
5.7 L/100 km
41.3 mpg US
49.6 mpg UK
9.3 L/100 km
25.3 mpg US
30.4 mpg UK
Practicality
Doors/seats
4 doors
5 seats
Trunk-
Length
4,686 mm
184.5 in
Height
1,442 mm
56.8 in
Doors/seats
4 doors
5 seats
Trunk
510 L
18.0 cu ft
Length
4,855 mm
191.1 in
Height
1,475 mm
58.1 in
Range score
719 km
447 mi
753 km
468 mi
CO2 score
151 g/km
-
Trunk score
-
510 L
18.0 cu ft
Power-to-weight score
150 hp/t
112 kW/t
6.7 kg/hp
142 hp/t
106 kW/t
7.1 kg/hp
Overall
Fixed score
Fixed score

Fuel cost and annual usage

Estimate running costs from combined consumption, your annual distance, and the fuel price in your local currency.

Enter the fuel price in your local currency, for example €/L, $/gal, £/L or any other local currency.

LC = Local Currency

Fuel cost and annual usage
VehicleMercedes-Benz C-class (W205) Facelift 2018 C 300dKia Optima IV Facelift 2018 2.0 T-GDI
Consumption5.7 L/100 km41.3 mpg US49.6 mpg UK9.3 L/100 km25.3 mpg US30.4 mpg UK
Cost / 100 km9.98 LC100 km16.28 LC100 km
Cost / 100 mi16.05 LC100 mi26.19 LC100 mi
Annual fuel used855 L226 US gal188 UK gal1,395 L369 US gal307 UK gal
Annual fuel cost1,496 LC/year2,441 LC/year

Head-to-head comparisons

Mercedes-Benz C-class (W205) Facelift 2018 C 300d

  • Has 7 hp more
  • Has 147 Nm more
  • Is 50 kg lighter
  • Is 1.7 s quicker from 0-100 km/h
  • Has 10 km/h (6 mph) higher top speed
  • Uses 3.6 L/100 km less fuel
  • Has 9 hp/t better power-to-weight

Pros

  • Quickest 0-100 km/h in this comparison
  • Highest top speed
  • Most powerful
  • Highest torque
  • Lightest
  • Lowest combined fuel consumption
  • Best power-to-weight ratio

Kia Optima IV Facelift 2018 2.0 T-GDI

  • Has 33 km (21 mi) more estimated range

Pros

  • Best estimated range

Cons

  • Slowest 0-100 km/h
  • Lowest power
  • Highest combined fuel consumption
  • Heaviest
  • Lowest top speed

Choose cars to compare

Brand
Model
Generation
Engine or modification
Mercedes-Benz C-class (W205) C 300d
Kia Optima IV 2.0 T-GDI
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2 vehicles selected

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