Car comparison

Mercedes-Benz C-class (W205) C 300vsKia Optima IV GT 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)

C 300

245 hp1991 ccGasolineRWDAutomaticTurbochargedSedan2016-2018
VS

Kia Optima IV

GT 2.0 T-GDI

245 hp1998 ccGasolineFWDAutomaticTwin-turboSedan2016-2018

Comparison overview

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

Best choices

Mercedes-Benz C-class (W205) C 300

  • Quickest 0-100 km/h
    5.9 s
  • Fastest top speed
    260 km/h
    162 mph Unrestricted
    250 km/h
    155 mph Restricted
  • Most powerful
    245 hp
    183 kW
  • Highest torque
    370 Nm
    273 lb-ft
  • Lightest
    1,455 kg
    3,208 lb
  • Best power-to-weight
    168 hp/t
    126 kW/t
    5.9 kg/hp
  • Lowest combined fuel consumption
    6.8 L/100 km
    34.6 mpg US
    41.5 mpg UK
  • Lowest city consumption
    8.7 L/100 km
    27.0 mpg US
    32.5 mpg UK
  • Lowest highway consumption
    5.7 L/100 km
    41.3 mpg US
    49.6 mpg UK
  • Lowest CO2 emissions
    154 g/km
  • Best estimated range
    971 km
    603 mi
  • Best overall score
    66/100
  • Best performance score
    62/100
  • Best economy score
    89/100

Specification comparison

Specification comparison
ModelMercedes-BenzC-class (W205)C 300KiaOptima IVGT 2.0 T-GDI
Power
245hp183kW
245hp183kW
Torque
370Nm273lb-ft
353Nm260lb-ft
Curb weight
1,455kg3,208lb
1,680kg3,704lb
Gross weight
2,095kg4,619lb
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
59.4s99% target: 257 km/h / 160 mph
Calculated
72.7s99% target: 248 km/h / 154 mph
Calculated
0-100 km/h
5.9s
7.4s
0-200 km/h
18.4s
Calculated
24.4s
Calculated
0-60 mph
5.6s
Calculated
7.1s
Calculated
Fuel consumption
6.8L/100 km34.6mpg US41.5mpg UK
8.2L/100 km28.7mpg US34.4mpg UK
Fuel consumption city
8.7L/100 km27mpg US32.5mpg UK
11.8L/100 km19.9mpg US23.9mpg UK
Fuel consumption highway
5.7L/100 km41.3mpg US49.6mpg UK
6.1L/100 km38.6mpg US46.3mpg UK
Quarter mile
13.9s
Calculated
15.2s
Calculated
Power-to-weight
168hp/t126kW/t76hp/1000 lb
Calculated
146hp/t109kW/t66hp/1000 lb
Calculated
Torque-to-weight
254Nm/t170lb-ft/ton
Calculated
210Nm/t141lb-ft/ton
Calculated
Estimated range
971km603mi
Calculated
854km530mi
Calculated
Displacement
1,991cc121cu in
1,998cc122cu in
Length
4,686mm184in
4,855mm191in
Width
1,810mm71in
1,860mm73in
Height
1,442mm57in
1,465mm58in
Wheelbase
2,840mm112in
2,805mm110in
Front track
1,588mm63in
1,597mm63in
Rear track
1,570mm62in
1,608mm63in
Trunk volume
480L
510L
Doors
4
4
Seats
5
5
Fuel tank
66L
70L
CO2 emissions
154g/km
191g/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) C 300Kia Optima IV GT 2.0 T-GDIPowerTorque
  • Mercedes-Benz C-class (W205) C 300: Power / Torque
  • Kia Optima IV GT 2.0 T-GDI: Power / Torque
Dyno simulation data table
VehiclePeak power RPMPeak torque RPMMax engine speed
Mercedes-BenzC-class (W205)C 3005,500 rpm1,300-4,000 rpm5,750 rpm
KiaOptima IVGT 2.0 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)C 300KiaOptima IVGT 2.0 T-GDI
Acceleration checkpoints
0-60 mph
0-97 km/h
5.6 s
7.1 s
0-100 km/h
0-62 mph
5.9 s
7.4 s
0-200 km/h
0-124 mph
18.4 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
6.3 s
6.9 s
1/8 mile
201 m
9.3 s
10.2 s
1000 ft
305 m
11.8 s
12.9 s
1/4 mile
402 m
13.9 s
15.2 s
Trap speed
1/4 mile
402 m
175 km/h
109 mph
160 km/h
100 mph

Power comparison

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

Chart data table
VehicleValue
Mercedes-BenzC-class (W205)C 300
245 hp
183 kW
KiaOptima IVGT 2.0 T-GDI
245 hp
183 kW

Torque comparison

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

Chart data table
VehicleValue
Mercedes-BenzC-class (W205)C 300
370 Nm
273 lb-ft
KiaOptima IVGT 2.0 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)C 300
1,455 kg
3,208 lb
KiaOptima IVGT 2.0 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)C 300
Unrestricted
260 km/h162 mph
Restricted
250 km/h155 mph
KiaOptima IVGT 2.0 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)C 3005.9 s
KiaOptima IVGT 2.0 T-GDI7.4 s

The biggest 0-100 km/h difference is between Mercedes-Benz C-class (W205) C 300 and Kia Optima IV GT 2.0 T-GDI: 1.5 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)C 300
6.8 L/100 km
34.6 mpg US
41.5 mpg UK
KiaOptima IVGT 2.0 T-GDI
8.2 L/100 km
28.7 mpg US
34.4 mpg UK

The biggest fuel consumption difference is between Mercedes-Benz C-class (W205) C 300 and Kia Optima IV GT 2.0 T-GDI: 1.4 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)C 300
168 hp/t
126 kW/t
5.9 kg/hp
KiaOptima IVGT 2.0 T-GDI
146 hp/t
109 kW/t
6.9 kg/hp

Estimated range comparison

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

Chart data table
VehicleValue
Mercedes-BenzC-class (W205)C 300
971 km
603 mi
KiaOptima IVGT 2.0 T-GDI
854 km
530 mi

Performance spider chart

Radar chart comparing normalized performance and fuel-consumption scores.

Chart data table
VehiclePowerAccelerationTop speed
Mercedes-BenzC-class (W205)C 300
245 hp
183 kW
5.9 s
Unrestricted
260 km/h162 mph
Restricted
250 km/h155 mph
KiaOptima IVGT 2.0 T-GDI
245 hp
183 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)C 300
Power
245 hp
183 kW
0-100 km/h5.9 s
Top speed
Unrestricted
260 km/h162 mph
Restricted
250 km/h155 mph
Doors/seats
4 doors
5 seats
Trunk
480 L
17.0 cu ft
Length
4,686 mm
184.5 in
Height
1,442 mm
56.8 in
KiaOptima IVGT 2.0 T-GDI
Power
245 hp
183 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
1,465 mm
57.7 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)C 300
Power
245 hp
183 kW
0-100 km/h5.9 s
Top speed
Unrestricted
260 km/h162 mph
Restricted
250 km/h155 mph
6.8 L/100 km
34.6 mpg US
41.5 mpg UK
KiaOptima IVGT 2.0 T-GDI
Power
245 hp
183 kW
0-100 km/h7.4 s
Top speed
Unrestricted
250 km/h155 mph
Restricted
240 km/h149 mph
8.2 L/100 km
28.7 mpg US
34.4 mpg UK

Mercedes-Benz C-class (W205) C 300 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)C 300
6.8 L/100 km
34.6 mpg US
41.5 mpg UK
5.9 s
KiaOptima IVGT 2.0 T-GDI
8.2 L/100 km
28.7 mpg US
34.4 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)C 300
168 hp/t
126 kW/t
5.9 kg/hp
6.8 L/100 km
34.6 mpg US
41.5 mpg UK
KiaOptima IVGT 2.0 T-GDI
146 hp/t
109 kW/t
6.9 kg/hp
8.2 L/100 km
28.7 mpg US
34.4 mpg UK

Detailed score breakdown

Detailed score breakdown
VehicleMercedes-BenzC-class (W205)C 300KiaOptima IVGT 2.0 T-GDI
Power
245 hp
183 kW
245 hp
183 kW
Torque
370 Nm
273 lb-ft
353 Nm
260 lb-ft
Acceleration
5.9 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
1,455 kg
3,208 lb
1,680 kg
3,704 lb
Fuel consumption
6.8 L/100 km
34.6 mpg US
41.5 mpg UK
8.2 L/100 km
28.7 mpg US
34.4 mpg UK
Practicality
Doors/seats
4 doors
5 seats
Trunk
480 L
17.0 cu ft
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
1,465 mm
57.7 in
Range score
971 km
603 mi
854 km
530 mi
CO2 score
154 g/km
191 g/km
Trunk score
480 L
17.0 cu ft
510 L
18.0 cu ft
Power-to-weight score
168 hp/t
126 kW/t
5.9 kg/hp
146 hp/t
109 kW/t
6.9 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) C 300Kia Optima IV GT 2.0 T-GDI
Consumption6.8 L/100 km34.6 mpg US41.5 mpg UK8.2 L/100 km28.7 mpg US34.4 mpg UK
Cost / 100 km11.90 LC100 km14.35 LC100 km
Cost / 100 mi19.15 LC100 mi23.09 LC100 mi
Annual fuel used1,020 L269 US gal224 UK gal1,230 L325 US gal271 UK gal
Annual fuel cost1,785 LC/year2,153 LC/year

Head-to-head comparisons

Mercedes-Benz C-class (W205) C 300

  • Has 17 Nm more
  • Is 225 kg lighter
  • Is 1.5 s quicker from 0-100 km/h
  • Has 10 km/h (6 mph) higher top speed
  • Uses 1.4 L/100 km less fuel
  • Has 23 hp/t better power-to-weight
  • Has 117 km (73 mi) more estimated range
  • Emits 37 g/km less CO2

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
  • Best estimated range

Cons

  • Smallest trunk

Kia Optima IV GT 2.0 T-GDI

  • Has 30 L more trunk volume

Pros

  • Largest trunk

Cons

  • Slowest 0-100 km/h
  • Highest combined fuel consumption
  • Heaviest
  • Lowest top speed
  • Highest CO2 emissions

Choose cars to compare

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