Car comparison

BMW 3 Series Convertible (E46) · Facelift 2003 325CivsBMW 3 Series Sedan (G20) 318d

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

New comparison

BMW 3 Series Convertible (E46) · Facelift 2003

325Ci

192 hp2494 ccGasolineRWDManualNaturally aspiratedCabriolet / convertible2003-2006
VS

BMW 3 Series Sedan (G20)

318d

150 hp1995 ccDieselRWDAutomaticTurbochargedSedan2019-2022

Comparison overview

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

Best choices

BMW 3 Series Sedan (G20) 318d

  • Highest torque
    320 Nm
    236 lb-ft
  • Lightest
    1,455 kg
    3,208 lb
  • Lowest combined fuel consumption
    4.5 L/100 km
    52.3 mpg US
    62.8 mpg UK
  • Lowest city consumption
    5.0 L/100 km
    47.0 mpg US
    56.5 mpg UK
  • Lowest highway consumption
    4.2 L/100 km
    56.0 mpg US
    67.3 mpg UK
  • Lowest CO2 emissions
    118 g/km
  • Best estimated range
    889 km
    552 mi
  • Largest trunk
    480 L
  • Best overall score
    57/100
  • Best economy score
    95/100
  • Best practicality score
    77/100

Specification comparison

Specification comparison
ModelBMW3 Series Convertible (E46)Facelift 2003325CiBMW3 Series Sedan (G20)318d
Power
192hp143kW
150hp112kW
Torque
245Nm181lb-ft
320Nm236lb-ft
Curb weight
1,640kg3,616lb
1,455kg3,208lb
Gross weight
1,985kg4,376lb
2,085kg4,597lb
Top speed
234 km/h
145 mph
224 km/h
139 mph
To 99% top speed
109.0s99% target: 232 km/h / 144 mph
Calculated
69.3s99% target: 222 km/h / 138 mph
Calculated
0-100 km/h
8.0s
8.3s
0-200 km/h
37.2s
Calculated
32.8s
Calculated
0-60 mph
7.6s
Calculated
7.9s
Calculated
Fuel consumption
9.6L/100 km24.5mpg US29.4mpg UK
4.5L/100 km52.3mpg US62.8mpg UK
Fuel consumption city
13.4L/100 km17.6mpg US21.1mpg UK
5L/100 km47mpg US56.5mpg UK
Fuel consumption highway
7.3L/100 km32.2mpg US38.7mpg UK
4.2L/100 km56mpg US67.3mpg UK
Quarter mile
15.8s
Calculated
16.0s
Calculated
Power-to-weight
117hp/t87kW/t53hp/1000 lb
Calculated
103hp/t77kW/t47hp/1000 lb
Calculated
Torque-to-weight
149Nm/t100lb-ft/ton
Calculated
220Nm/t147lb-ft/ton
Calculated
Estimated range
656km408mi
Calculated
889km552mi
Calculated
Displacement
2,494cc152cu in
1,995cc122cu in
Length
4,488mm177in
4,709mm185in
Width
1,757mm69in
1,827mm72in
Height
1,372mm54in
1,435mm56in
Wheelbase
2,725mm107in
2,851mm112in
Front track
1,471mm58in
-
Rear track
1,483mm58in
-
Trunk volume
260L
-
Max trunk volume
300L
480L
Doors
2
4
Seats
4
5
Fuel tank
63L
40L
CO2 emissions
229g/km
118g/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.

BMW 3 Series Convertible (E46) Facelift 2003 325CiBMW 3 Series Sedan (G20) 318dPowerTorque
  • BMW 3 Series Convertible (E46) Facelift 2003 325Ci: Power / Torque
  • BMW 3 Series Sedan (G20) 318d: Power / Torque
Dyno simulation data table
VehiclePeak power RPMPeak torque RPMMax engine speed
BMW3 Series Convertible (E46)Facelift 2003325Ci6,000 rpm3,500 rpm6,250 rpm
BMW3 Series Sedan (G20)318d3,750-4,000 rpm1,500-3,000 rpm4,250 rpm

Acceleration curve

Estimated speed over time for selected vehicles.

Acceleration and drag-race table
MetricBMW3 Series Convertible (E46)Facelift 2003325CiBMW3 Series Sedan (G20)318d
Acceleration checkpoints
0-60 mph
0-97 km/h
7.6 s
7.9 s
0-100 km/h
0-62 mph
8.0 s
8.3 s
0-200 km/h
0-124 mph
37.2 s
32.8 s
Top speed
234 km/h
145 mph
224 km/h
139 mph
Drag race simulation
60 ft
18 m
2.5 s
2.9 s
330 ft
101 m
6.8 s
7.2 s
1/8 mile
201 m
10.3 s
10.7 s
1000 ft
305 m
13.3 s
13.6 s
1/4 mile
402 m
15.8 s
16.0 s
Trap speed
1/4 mile
402 m
145 km/h
90 mph
151 km/h
94 mph

Power comparison

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

Chart data table
VehicleValue
BMW3 Series Convertible (E46)Facelift 2003325Ci
192 hp
143 kW
BMW3 Series Sedan (G20)318d
150 hp
112 kW

BMW 3 Series Convertible (E46) Facelift 2003 325Ci has 42 hp more than BMW 3 Series Sedan (G20) 318d.

The biggest power difference is between BMW 3 Series Sedan (G20) 318d and BMW 3 Series Convertible (E46) Facelift 2003 325Ci: 42 hp (31 kW).

Torque comparison

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

Chart data table
VehicleValue
BMW3 Series Convertible (E46)Facelift 2003325Ci
245 Nm
181 lb-ft
BMW3 Series Sedan (G20)318d
320 Nm
236 lb-ft

Curb weight comparison

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

Chart data table
VehicleValue
BMW3 Series Convertible (E46)Facelift 2003325Ci
1,640 kg
3,616 lb
BMW3 Series Sedan (G20)318d
1,455 kg
3,208 lb

Top speed without limiter comparison

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

Chart data table
VehicleValue
BMW3 Series Convertible (E46)Facelift 2003325Ci
234 km/h
145 mph
BMW3 Series Sedan (G20)318d
224 km/h
139 mph

0-100 km/h comparison

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

Chart data table
VehicleValue
BMW3 Series Convertible (E46)Facelift 2003325Ci8.0 s
BMW3 Series Sedan (G20)318d8.3 s

The biggest 0-100 km/h difference is between BMW 3 Series Convertible (E46) Facelift 2003 325Ci and BMW 3 Series Sedan (G20) 318d: 0.3 s.

Fuel consumption comparison

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

Chart data table
VehicleValue
BMW3 Series Convertible (E46)Facelift 2003325Ci
9.6 L/100 km
24.5 mpg US
29.4 mpg UK
BMW3 Series Sedan (G20)318d
4.5 L/100 km
52.3 mpg US
62.8 mpg UK

The biggest fuel consumption difference is between BMW 3 Series Sedan (G20) 318d and BMW 3 Series Convertible (E46) Facelift 2003 325Ci: 5.1 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
BMW3 Series Convertible (E46)Facelift 2003325Ci
117 hp/t
87 kW/t
8.5 kg/hp
BMW3 Series Sedan (G20)318d
103 hp/t
77 kW/t
9.7 kg/hp

Estimated range comparison

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

Chart data table
VehicleValue
BMW3 Series Convertible (E46)Facelift 2003325Ci
656 km
408 mi
BMW3 Series Sedan (G20)318d
889 km
552 mi

Performance spider chart

Radar chart comparing normalized performance and fuel-consumption scores.

Chart data table
VehiclePowerAccelerationTop speed
BMW3 Series Convertible (E46)Facelift 2003325Ci
192 hp
143 kW
8.0 s
234 km/h
145 mph
BMW3 Series Sedan (G20)318d
150 hp
112 kW
8.3 s
224 km/h
139 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
BMW3 Series Convertible (E46)Facelift 2003325Ci
Power
192 hp
143 kW
0-100 km/h8.0 s
Top speed
234 km/h
145 mph
Doors/seats
2 doors
4 seats
Trunk
260 L
9.2 cu ft
Length
4,488 mm
176.7 in
Height
1,372 mm
54.0 in
BMW3 Series Sedan (G20)318d
Power
150 hp
112 kW
0-100 km/h8.3 s
Top speed
224 km/h
139 mph
Doors/seats
4 doors
5 seats
Trunk
480 L
17.0 cu ft
Length
4,709 mm
185.4 in
Height
1,435 mm
56.5 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
BMW3 Series Convertible (E46)Facelift 2003325Ci
Power
192 hp
143 kW
0-100 km/h8.0 s
Top speed
234 km/h
145 mph
9.6 L/100 km
24.5 mpg US
29.4 mpg UK
BMW3 Series Sedan (G20)318d
Power
150 hp
112 kW
0-100 km/h8.3 s
Top speed
224 km/h
139 mph
4.5 L/100 km
52.3 mpg US
62.8 mpg UK

BMW 3 Series Sedan (G20) 318d 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
BMW3 Series Convertible (E46)Facelift 2003325Ci
9.6 L/100 km
24.5 mpg US
29.4 mpg UK
8.0 s
BMW3 Series Sedan (G20)318d
4.5 L/100 km
52.3 mpg US
62.8 mpg UK
8.3 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
BMW3 Series Convertible (E46)Facelift 2003325Ci
117 hp/t
87 kW/t
8.5 kg/hp
9.6 L/100 km
24.5 mpg US
29.4 mpg UK
BMW3 Series Sedan (G20)318d
103 hp/t
77 kW/t
9.7 kg/hp
4.5 L/100 km
52.3 mpg US
62.8 mpg UK

Detailed score breakdown

Detailed score breakdown
VehicleBMW3 Series Convertible (E46)Facelift 2003325CiBMW3 Series Sedan (G20)318d
Power
192 hp
143 kW
150 hp
112 kW
Torque
245 Nm
181 lb-ft
320 Nm
236 lb-ft
Acceleration
8.0 s
8.3 s
Top speed
234 km/h
145 mph
224 km/h
139 mph
Lightness
1,640 kg
3,616 lb
1,455 kg
3,208 lb
Fuel consumption
9.6 L/100 km
24.5 mpg US
29.4 mpg UK
4.5 L/100 km
52.3 mpg US
62.8 mpg UK
Practicality
Doors/seats
2 doors
4 seats
Trunk
260 L
9.2 cu ft
Length
4,488 mm
176.7 in
Height
1,372 mm
54.0 in
Doors/seats
4 doors
5 seats
Trunk
480 L
17.0 cu ft
Length
4,709 mm
185.4 in
Height
1,435 mm
56.5 in
Range score
656 km
408 mi
889 km
552 mi
CO2 score
229 g/km
118 g/km
Trunk score
260 L
9.2 cu ft
480 L
17.0 cu ft
Power-to-weight score
117 hp/t
87 kW/t
8.5 kg/hp
103 hp/t
77 kW/t
9.7 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
VehicleBMW 3 Series Convertible (E46) Facelift 2003 325CiBMW 3 Series Sedan (G20) 318d
Consumption9.6 L/100 km24.5 mpg US29.4 mpg UK4.5 L/100 km52.3 mpg US62.8 mpg UK
Cost / 100 km16.80 LC100 km7.88 LC100 km
Cost / 100 mi27.04 LC100 mi12.67 LC100 mi
Annual fuel used1,440 L380 US gal317 UK gal675 L178 US gal148 UK gal
Annual fuel cost2,520 LC/year1,181 LC/year

Head-to-head comparisons

BMW 3 Series Convertible (E46) Facelift 2003 325Ci

  • Has 42 hp more
  • Is 0.3 s quicker from 0-100 km/h
  • Has 10 km/h (6 mph) higher top speed
  • Has 14 hp/t better power-to-weight

Pros

  • Quickest 0-100 km/h in this comparison
  • Highest top speed
  • Most powerful
  • Best power-to-weight ratio

Cons

  • Highest combined fuel consumption
  • Heaviest
  • Smallest trunk
  • Highest CO2 emissions

BMW 3 Series Sedan (G20) 318d

  • Has 75 Nm more
  • Is 185 kg lighter
  • Uses 5.1 L/100 km less fuel
  • Has 233 km (145 mi) more estimated range
  • Has 220 L more trunk volume
  • Emits 111 g/km less CO2

Pros

  • Highest torque
  • Lightest
  • Lowest combined fuel consumption
  • Best estimated range
  • Largest trunk

Cons

  • Slowest 0-100 km/h
  • Lowest power
  • Lowest top speed

Choose cars to compare

Brand
Model
Generation
Engine or modification
BMW 3 Series Convertible (E46) 325Ci
BMW 3 Series Sedan (G20) 318d
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2 vehicles selected

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BMW 3 Series Convertible (E46) · Facelift 2003 325Ci vs BMW 3 Series Sedan (G20) 318d - car comparison - FastVsFaster