Car comparison

Alfa Romeo RZ 3.0 i V6vsBMW M3 Convertible (E30) 2.3

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

New comparison

Alfa Romeo RZ

3.0 i V6

210 hp2959 ccGasolineRWDManualNaturally aspiratedCabriolet / convertible1988-1993
VS

BMW M3 Convertible (E30)

2.3

200 hp2302 ccGasolineRWDManualNaturally aspiratedCabriolet / convertible1988-1991

Comparison overview

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

Best choices

BMW M3 Convertible (E30) 2.3

  • Quickest 0-100 km/h
    7.3 s
  • Lightest
    1,360 kg
    2,998 lb
  • Lowest combined fuel consumption
    8.9 L/100 km
    26.4 mpg US
    31.7 mpg UK
  • Lowest city consumption
    12.6 L/100 km
    18.7 mpg US
    22.4 mpg UK
  • Largest trunk
    303 L
  • Best overall score
    48/100
  • Best economy score
    83/100
  • Best practicality score
    45/100

Alfa Romeo RZ 3.0 i V6

  • Fastest top speed
    240 km/h
    149 mph Unrestricted
    230 km/h
    143 mph Restricted
  • Most powerful
    210 hp
    157 kW
  • Highest torque
    245 Nm
    181 lb-ft
  • Best power-to-weight
    152 hp/t
    113 kW/t
    6.6 kg/hp
  • Lowest highway consumption
    7.2 L/100 km
    32.7 mpg US
    39.2 mpg UK
  • Best estimated range
    753 km
    468 mi
  • Best performance score
    51/100

Specification comparison

Specification comparison
ModelAlfa RomeoRZ3.0 i V6BMWM3 Convertible (E30)2.3
Power
210hp157kW
200hp149kW
Torque
245Nm181lb-ft
240Nm177lb-ft
Curb weight
1,380kg3,042lb
1,360kg2,998lb
Gross weight
1,550kg3,417lb
1,720kg3,792lb
Top speed
Unrestricted
240 km/h149 mph
Restricted
230 km/h143 mph
Calculated
233 km/h
145 mph
To 99% top speed
95.6s99% target: 238 km/h / 148 mph
Calculated
90.7s99% target: 231 km/h / 143 mph
Calculated
0-100 km/h
7.5s
7.3s
0-200 km/h
31.2s
Calculated
32.5s
Calculated
0-60 mph
7.1s
Calculated
6.9s
Calculated
Fuel consumption
9.3L/100 km25.3mpg US30.4mpg UK
8.9L/100 km26.4mpg US31.7mpg UK
Fuel consumption city
13.2L/100 km17.8mpg US21.4mpg UK
12.6L/100 km18.7mpg US22.4mpg UK
Fuel consumption highway
7.2L/100 km32.7mpg US39.2mpg UK
7.8L/100 km30.2mpg US36.2mpg UK
Quarter mile
15.4s
Calculated
15.2s
Calculated
Power-to-weight
152hp/t113kW/t69hp/1000 lb
Calculated
147hp/t110kW/t67hp/1000 lb
Calculated
Torque-to-weight
178Nm/t119lb-ft/ton
Calculated
176Nm/t118lb-ft/ton
Calculated
Estimated range
753km468mi
Calculated
697km433mi
Calculated
Displacement
2,959cc181cu in
2,302cc140cu in
Length
4,060mm160in
4,345mm171in
Width
1,730mm68in
1,680mm66in
Height
1,300mm51in
1,370mm54in
Wheelbase
2,510mm99in
2,565mm101in
Front track
1,465mm58in
1,414mm56in
Rear track
1,425mm56in
1,435mm56in
Trunk volume
120L
303L
Max trunk volume
390L
-
Doors
2
2
Seats
2
4
Fuel tank
70L
62L

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.

Alfa Romeo RZ 3.0 i V6BMW M3 Convertible (E30) 2.3PowerTorque
  • Alfa Romeo RZ 3.0 i V6: Power / Torque
  • BMW M3 Convertible (E30) 2.3: Power / Torque
Dyno simulation data table
VehiclePeak power RPMPeak torque RPMMax engine speed
Alfa RomeoRZ3.0 i V66,200 rpm4,500 rpm6,450 rpm
BMWM3 Convertible (E30)2.36,750 rpm4,750 rpm7,000 rpm

Acceleration curve

Estimated speed over time for selected vehicles.

Acceleration and drag-race table
MetricAlfa RomeoRZ3.0 i V6BMWM3 Convertible (E30)2.3
Acceleration checkpoints
0-60 mph
0-97 km/h
7.1 s
6.9 s
0-100 km/h
0-62 mph
7.5 s
7.3 s
0-200 km/h
0-124 mph
31.2 s
32.5 s
Top speed
Unrestricted
240 km/h149 mph
Restricted
230 km/h143 mph
Likely limited
233 km/h
145 mph
Drag race simulation
60 ft
18 m
2.5 s
2.5 s
330 ft
101 m
6.7 s
6.6 s
1/8 mile
201 m
10.1 s
9.9 s
1000 ft
305 m
13.0 s
12.8 s
1/4 mile
402 m
15.4 s
15.2 s
Trap speed
1/4 mile
402 m
151 km/h
94 mph
150 km/h
94 mph

Power comparison

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

Chart data table
VehicleValue
Alfa RomeoRZ3.0 i V6
210 hp
157 kW
BMWM3 Convertible (E30)2.3
200 hp
149 kW

Alfa Romeo RZ 3.0 i V6 has 10 hp more than BMW M3 Convertible (E30) 2.3.

The biggest power difference is between BMW M3 Convertible (E30) 2.3 and Alfa Romeo RZ 3.0 i V6: 10 hp (7 kW).

Torque comparison

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

Chart data table
VehicleValue
Alfa RomeoRZ3.0 i V6
245 Nm
181 lb-ft
BMWM3 Convertible (E30)2.3
240 Nm
177 lb-ft

Curb weight comparison

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

Chart data table
VehicleValue
Alfa RomeoRZ3.0 i V6
1,380 kg
3,042 lb
BMWM3 Convertible (E30)2.3
1,360 kg
2,998 lb

Top speed without limiter comparison

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

Chart data table
VehicleValue
Alfa RomeoRZ3.0 i V6
Unrestricted
240 km/h149 mph
Restricted
230 km/h143 mph
BMWM3 Convertible (E30)2.3
233 km/h
145 mph

0-100 km/h comparison

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

Chart data table
VehicleValue
Alfa RomeoRZ3.0 i V67.5 s
BMWM3 Convertible (E30)2.37.3 s

Although Alfa Romeo RZ 3.0 i V6 has more power, BMW M3 Convertible (E30) 2.3 is quicker from 0-100 km/h.

The biggest 0-100 km/h difference is between BMW M3 Convertible (E30) 2.3 and Alfa Romeo RZ 3.0 i V6: 0.2 s.

Fuel consumption comparison

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

Chart data table
VehicleValue
Alfa RomeoRZ3.0 i V6
9.3 L/100 km
25.3 mpg US
30.4 mpg UK
BMWM3 Convertible (E30)2.3
8.9 L/100 km
26.4 mpg US
31.7 mpg UK

Power-to-weight comparison

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

Chart data table
VehicleValue
Alfa RomeoRZ3.0 i V6
152 hp/t
113 kW/t
6.6 kg/hp
BMWM3 Convertible (E30)2.3
147 hp/t
110 kW/t
6.8 kg/hp

Estimated range comparison

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

Chart data table
VehicleValue
Alfa RomeoRZ3.0 i V6
753 km
468 mi
BMWM3 Convertible (E30)2.3
697 km
433 mi

Performance spider chart

Radar chart comparing normalized performance and fuel-consumption scores.

Chart data table
VehiclePowerAccelerationTop speed
Alfa RomeoRZ3.0 i V6
210 hp
157 kW
7.5 s
Unrestricted
240 km/h149 mph
Restricted
230 km/h143 mph
BMWM3 Convertible (E30)2.3
200 hp
149 kW
7.3 s
233 km/h
145 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
Alfa RomeoRZ3.0 i V6
Power
210 hp
157 kW
0-100 km/h7.5 s
Top speed
Unrestricted
240 km/h149 mph
Restricted
230 km/h143 mph
Doors/seats
2 doors
2 seats
Trunk
120 L
4.2 cu ft
Length
4,060 mm
159.8 in
Height
1,300 mm
51.2 in
BMWM3 Convertible (E30)2.3
Power
200 hp
149 kW
0-100 km/h7.3 s
Top speed
233 km/h
145 mph
Doors/seats
2 doors
4 seats
Trunk
303 L
10.7 cu ft
Length
4,345 mm
171.1 in
Height
1,370 mm
53.9 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
Alfa RomeoRZ3.0 i V6
Power
210 hp
157 kW
0-100 km/h7.5 s
Top speed
Unrestricted
240 km/h149 mph
Restricted
230 km/h143 mph
9.3 L/100 km
25.3 mpg US
30.4 mpg UK
BMWM3 Convertible (E30)2.3
Power
200 hp
149 kW
0-100 km/h7.3 s
Top speed
233 km/h
145 mph
8.9 L/100 km
26.4 mpg US
31.7 mpg UK

Alfa Romeo RZ 3.0 i V6 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
Alfa RomeoRZ3.0 i V6
9.3 L/100 km
25.3 mpg US
30.4 mpg UK
7.5 s
BMWM3 Convertible (E30)2.3
8.9 L/100 km
26.4 mpg US
31.7 mpg UK
7.3 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
Alfa RomeoRZ3.0 i V6
152 hp/t
113 kW/t
6.6 kg/hp
9.3 L/100 km
25.3 mpg US
30.4 mpg UK
BMWM3 Convertible (E30)2.3
147 hp/t
110 kW/t
6.8 kg/hp
8.9 L/100 km
26.4 mpg US
31.7 mpg UK

Detailed score breakdown

Detailed score breakdown
VehicleAlfa RomeoRZ3.0 i V6BMWM3 Convertible (E30)2.3
Power
210 hp
157 kW
200 hp
149 kW
Torque
245 Nm
181 lb-ft
240 Nm
177 lb-ft
Acceleration
7.5 s
7.3 s
Top speed
Unrestricted
240 km/h149 mph
Restricted
230 km/h143 mph
233 km/h
145 mph
Lightness
1,380 kg
3,042 lb
1,360 kg
2,998 lb
Fuel consumption
9.3 L/100 km
25.3 mpg US
30.4 mpg UK
8.9 L/100 km
26.4 mpg US
31.7 mpg UK
Practicality
Doors/seats
2 doors
2 seats
Trunk
120 L
4.2 cu ft
Length
4,060 mm
159.8 in
Height
1,300 mm
51.2 in
Doors/seats
2 doors
4 seats
Trunk
303 L
10.7 cu ft
Length
4,345 mm
171.1 in
Height
1,370 mm
53.9 in
Range score
753 km
468 mi
697 km
433 mi
Trunk score
120 L
4.2 cu ft
303 L
10.7 cu ft
Power-to-weight score
152 hp/t
113 kW/t
6.6 kg/hp
147 hp/t
110 kW/t
6.8 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
VehicleAlfa Romeo RZ 3.0 i V6BMW M3 Convertible (E30) 2.3
Consumption9.3 L/100 km25.3 mpg US30.4 mpg UK8.9 L/100 km26.4 mpg US31.7 mpg UK
Cost / 100 km16.28 LC100 km15.58 LC100 km
Cost / 100 mi26.19 LC100 mi25.07 LC100 mi
Annual fuel used1,395 L369 US gal307 UK gal1,335 L353 US gal294 UK gal
Annual fuel cost2,441 LC/year2,336 LC/year

Head-to-head comparisons

Alfa Romeo RZ 3.0 i V6

  • Has 10 hp more
  • Has 5 Nm more
  • Has 7 km/h (4 mph) higher top speed
  • Has 5 hp/t better power-to-weight
  • Has 56 km (35 mi) more estimated range

Pros

  • Highest top speed
  • Most powerful
  • Highest torque
  • Best power-to-weight ratio
  • Best estimated range

Cons

  • Slowest 0-100 km/h
  • Highest combined fuel consumption
  • Heaviest
  • Smallest trunk

BMW M3 Convertible (E30) 2.3

  • Is 20 kg lighter
  • Is 0.2 s quicker from 0-100 km/h
  • Uses 0.4 L/100 km less fuel
  • Has 183 L more trunk volume

Pros

  • Quickest 0-100 km/h in this comparison
  • Lightest
  • Lowest combined fuel consumption
  • Largest trunk

Cons

  • Lowest power
  • Lowest top speed

Choose cars to compare

Brand
Model
Generation
Engine or modification
Alfa Romeo RZ 3.0 i V6
BMW M3 Convertible (E30) 2.3
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