Car comparison

Alfa Romeo 8C Spider 4.7 V8vsAUDI TT RS Roadster (8J) 2.5 TFSI

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

New comparison

Alfa Romeo 8C Spider

4.7 V8

450 hp4691 ccGasolineRWDManualNaturally aspiratedRoadster2008-2010
VS

AUDI TT RS Roadster (8J)

2.5 TFSI

340 hp2480 ccGasolineAWDManualTurbochargedRoadster2009-2010

Comparison overview

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

Best choices

Alfa Romeo 8C Spider 4.7 V8

  • Quickest 0-100 km/h
    4.4 s
  • Fastest top speed
    300 km/h
    186 mph Unrestricted
    290 km/h
    180 mph Restricted
  • Most powerful
    450 hp
    336 kW
  • Highest torque
    480 Nm
    354 lb-ft
  • Best power-to-weight
    269 hp/t
    200 kW/t
    3.7 kg/hp
  • Best overall score
    65/100
  • Best performance score
    80/100
  • Best practicality score
    32/100

AUDI TT RS Roadster (8J) 2.5 TFSI

  • Lightest
    1,510 kg
    3,329 lb
  • Lowest combined fuel consumption
    9.5 L/100 km
    24.8 mpg US
    29.7 mpg UK
  • Lowest CO2 emissions
    221 g/km
  • Best estimated range
    632 km
    392 mi
  • Best economy score
    81/100

Specification comparison

Specification comparison
ModelAlfa Romeo8C Spider4.7 V8AUDITT RS Roadster (8J)2.5 TFSI
Power
450hp336kW
340hp254kW
Torque
480Nm354lb-ft
450Nm332lb-ft
Curb weight
1,675kg3,693lb
1,510kg3,329lb
Gross weight
1,855kg4,090lb
1,830kg4,034lb
Top speed
Unrestricted
300 km/h186 mph
Restricted
290 km/h180 mph
Calculated
Unrestricted
260 km/h162 mph
Restricted
250 km/h155 mph
Calculated
To 99% top speed
67.0s99% target: 297 km/h / 185 mph
Calculated
61.0s99% target: 257 km/h / 160 mph
Calculated
0-100 km/h
4.4s
4.7s
0-200 km/h
13.5s
Calculated
16.6s
Calculated
0-60 mph
4.2s
Calculated
4.5s
Calculated
Fuel consumption
15.8L/100 km14.9mpg US17.9mpg UK
9.5L/100 km24.8mpg US29.7mpg UK
Fuel consumption city-
13.3L/100 km17.7mpg US21.2mpg UK
Fuel consumption highway-
7.2L/100 km32.7mpg US39.2mpg UK
Quarter mile
12.3s
Calculated
12.8s
Calculated
Power-to-weight
269hp/t200kW/t122hp/1000 lb
Calculated
225hp/t168kW/t102hp/1000 lb
Calculated
Torque-to-weight
287Nm/t192lb-ft/ton
Calculated
298Nm/t199lb-ft/ton
Calculated
Estimated range
557km346mi
Calculated
632km392mi
Calculated
Displacement
4,691cc286cu in
2,480cc151cu in
Length
4,381mm172in
4,198mm165in
Width
1,892mm74in
1,842mm73in
Height
1,366mm54in
1,348mm53in
Wheelbase
2,645mm104in
2,468mm97in
Front track
1,590mm63in
1,555mm61in
Rear track
1,589mm63in
1,546mm61in
Ground clearance
140mm6in
-
Trunk volume-
250L
Doors
2
2
Seats
2
2
Fuel tank
88L
60L
CO2 emissions
377g/km
221g/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.

Alfa Romeo 8C Spider 4.7 V8AUDI TT RS Roadster (8J) 2.5 TFSIPowerTorque
  • Alfa Romeo 8C Spider 4.7 V8: Power / Torque
  • AUDI TT RS Roadster (8J) 2.5 TFSI: Power / Torque
Dyno simulation data table
VehiclePeak power RPMPeak torque RPMMax engine speed
Alfa Romeo8C Spider4.7 V87,000 rpm4,750 rpm7,500 rpm
AUDITT RS Roadster (8J)2.5 TFSI5,400-6,500 rpm1,600-6,500 rpm6,750 rpm

Acceleration curve

Estimated speed over time for selected vehicles.

Acceleration and drag-race table
MetricAlfa Romeo8C Spider4.7 V8AUDITT RS Roadster (8J)2.5 TFSI
Acceleration checkpoints
0-60 mph
0-97 km/h
4.2 s
4.5 s
0-100 km/h
0-62 mph
4.4 s
4.7 s
0-200 km/h
0-124 mph
13.5 s
16.6 s
Top speed
Unrestricted
300 km/h186 mph
Restricted
290 km/h180 mph
Likely limited
Unrestricted
260 km/h162 mph
Restricted
250 km/h155 mph
Likely limited
Drag race simulation
60 ft
18 m
2.1 s
2.1 s
330 ft
101 m
5.5 s
5.6 s
1/8 mile
201 m
8.1 s
8.4 s
1000 ft
305 m
10.4 s
10.8 s
1/4 mile
402 m
12.3 s
12.8 s
Trap speed
1/4 mile
402 m
192 km/h
119 mph
179 km/h
112 mph

Power comparison

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

Chart data table
VehicleValue
Alfa Romeo8C Spider4.7 V8
450 hp
336 kW
AUDITT RS Roadster (8J)2.5 TFSI
340 hp
254 kW

Alfa Romeo 8C Spider 4.7 V8 has 110 hp more than AUDI TT RS Roadster (8J) 2.5 TFSI.

The biggest power difference is between AUDI TT RS Roadster (8J) 2.5 TFSI and Alfa Romeo 8C Spider 4.7 V8: 110 hp (82 kW).

Torque comparison

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

Chart data table
VehicleValue
Alfa Romeo8C Spider4.7 V8
480 Nm
354 lb-ft
AUDITT RS Roadster (8J)2.5 TFSI
450 Nm
332 lb-ft

Curb weight comparison

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

Chart data table
VehicleValue
Alfa Romeo8C Spider4.7 V8
1,675 kg
3,693 lb
AUDITT RS Roadster (8J)2.5 TFSI
1,510 kg
3,329 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 Romeo8C Spider4.7 V8
Unrestricted
300 km/h186 mph
Restricted
290 km/h180 mph
AUDITT RS Roadster (8J)2.5 TFSI
Unrestricted
260 km/h162 mph
Restricted
250 km/h155 mph

0-100 km/h comparison

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

Chart data table
VehicleValue
Alfa Romeo8C Spider4.7 V84.4 s
AUDITT RS Roadster (8J)2.5 TFSI4.7 s

The biggest 0-100 km/h difference is between Alfa Romeo 8C Spider 4.7 V8 and AUDI TT RS Roadster (8J) 2.5 TFSI: 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
Alfa Romeo8C Spider4.7 V8
15.8 L/100 km
14.9 mpg US
17.9 mpg UK
AUDITT RS Roadster (8J)2.5 TFSI
9.5 L/100 km
24.8 mpg US
29.7 mpg UK

The biggest fuel consumption difference is between AUDI TT RS Roadster (8J) 2.5 TFSI and Alfa Romeo 8C Spider 4.7 V8: 6.3 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
Alfa Romeo8C Spider4.7 V8
269 hp/t
200 kW/t
3.7 kg/hp
AUDITT RS Roadster (8J)2.5 TFSI
225 hp/t
168 kW/t
4.4 kg/hp

Estimated range comparison

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

Chart data table
VehicleValue
Alfa Romeo8C Spider4.7 V8
557 km
346 mi
AUDITT RS Roadster (8J)2.5 TFSI
632 km
392 mi

Performance spider chart

Radar chart comparing normalized performance and fuel-consumption scores.

Chart data table
VehiclePowerAccelerationTop speed
Alfa Romeo8C Spider4.7 V8
450 hp
336 kW
4.4 s
Unrestricted
300 km/h186 mph
Restricted
290 km/h180 mph
AUDITT RS Roadster (8J)2.5 TFSI
340 hp
254 kW
4.7 s
Unrestricted
260 km/h162 mph
Restricted
250 km/h155 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 Romeo8C Spider4.7 V8
Power
450 hp
336 kW
0-100 km/h4.4 s
Top speed
Unrestricted
300 km/h186 mph
Restricted
290 km/h180 mph
Doors/seats
2 doors
2 seats
Trunk-
Length
4,381 mm
172.5 in
Height
1,366 mm
53.8 in
AUDITT RS Roadster (8J)2.5 TFSI
Power
340 hp
254 kW
0-100 km/h4.7 s
Top speed
Unrestricted
260 km/h162 mph
Restricted
250 km/h155 mph
Doors/seats
2 doors
2 seats
Trunk
250 L
8.8 cu ft
Length
4,198 mm
165.3 in
Height
1,348 mm
53.1 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
Alfa Romeo8C Spider4.7 V8
Power
450 hp
336 kW
0-100 km/h4.4 s
Top speed
Unrestricted
300 km/h186 mph
Restricted
290 km/h180 mph
15.8 L/100 km
14.9 mpg US
17.9 mpg UK
AUDITT RS Roadster (8J)2.5 TFSI
Power
340 hp
254 kW
0-100 km/h4.7 s
Top speed
Unrestricted
260 km/h162 mph
Restricted
250 km/h155 mph
9.5 L/100 km
24.8 mpg US
29.7 mpg UK

AUDI TT RS Roadster (8J) 2.5 TFSI 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 Romeo8C Spider4.7 V8
15.8 L/100 km
14.9 mpg US
17.9 mpg UK
4.4 s
AUDITT RS Roadster (8J)2.5 TFSI
9.5 L/100 km
24.8 mpg US
29.7 mpg UK
4.7 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 Romeo8C Spider4.7 V8
269 hp/t
200 kW/t
3.7 kg/hp
15.8 L/100 km
14.9 mpg US
17.9 mpg UK
AUDITT RS Roadster (8J)2.5 TFSI
225 hp/t
168 kW/t
4.4 kg/hp
9.5 L/100 km
24.8 mpg US
29.7 mpg UK

Detailed score breakdown

Detailed score breakdown
VehicleAlfa Romeo8C Spider4.7 V8AUDITT RS Roadster (8J)2.5 TFSI
Power
450 hp
336 kW
340 hp
254 kW
Torque
480 Nm
354 lb-ft
450 Nm
332 lb-ft
Acceleration
4.4 s
4.7 s
Top speed
Unrestricted
300 km/h186 mph
Restricted
290 km/h180 mph
Unrestricted
260 km/h162 mph
Restricted
250 km/h155 mph
Lightness
1,675 kg
3,693 lb
1,510 kg
3,329 lb
Fuel consumption
15.8 L/100 km
14.9 mpg US
17.9 mpg UK
9.5 L/100 km
24.8 mpg US
29.7 mpg UK
Practicality
Doors/seats
2 doors
2 seats
Trunk-
Length
4,381 mm
172.5 in
Height
1,366 mm
53.8 in
Doors/seats
2 doors
2 seats
Trunk
250 L
8.8 cu ft
Length
4,198 mm
165.3 in
Height
1,348 mm
53.1 in
Range score
557 km
346 mi
632 km
392 mi
CO2 score
377 g/km
221 g/km
Trunk score
-
250 L
8.8 cu ft
Power-to-weight score
269 hp/t
200 kW/t
3.7 kg/hp
225 hp/t
168 kW/t
4.4 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 8C Spider 4.7 V8AUDI TT RS Roadster (8J) 2.5 TFSI
Consumption15.8 L/100 km14.9 mpg US17.9 mpg UK9.5 L/100 km24.8 mpg US29.7 mpg UK
Cost / 100 km27.65 LC100 km16.63 LC100 km
Cost / 100 mi44.50 LC100 mi26.76 LC100 mi
Annual fuel used2,370 L626 US gal521 UK gal1,425 L376 US gal313 UK gal
Annual fuel cost4,148 LC/year2,494 LC/year

Head-to-head comparisons

Alfa Romeo 8C Spider 4.7 V8

  • Has 110 hp more
  • Has 30 Nm more
  • Is 0.3 s quicker from 0-100 km/h
  • Has 40 km/h (25 mph) higher top speed
  • Has 43 hp/t better power-to-weight

Pros

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

Cons

  • Highest combined fuel consumption
  • Heaviest
  • Highest CO2 emissions

AUDI TT RS Roadster (8J) 2.5 TFSI

  • Is 165 kg lighter
  • Uses 6.3 L/100 km less fuel
  • Has 75 km (46 mi) more estimated range
  • Emits 156 g/km less CO2

Pros

  • Lightest
  • Lowest combined fuel consumption
  • Best estimated range

Cons

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

Choose cars to compare

Brand
Model
Generation
Engine or modification
Alfa Romeo 8C Spider 4.7 V8
AUDI TT RS Roadster (8J) 2.5 TFSI
Compare selected cars
2 vehicles selected

Popular comparisons

4.7 V8
4.7 V8
VS
Alfa Romeo8C Spider4.7 V8vsAston MartinV8 Vantage RoadsterFacelift 20084.7 V8
2.5 TFSI
2.5 TFSI
VS
AUDITT RS Roadster (8J)2.5 TFSIvsAUDITT RS Roadster (8J)Facelift 20102.5 TFSI
4.7 V8
SL 600 V12
VS
Alfa Romeo8C Spider4.7 V8vsMercedes-BenzSL (R230)Facelift 2008SL 600 V12
2.5 TFSI
2.0 TFSI
VS
AUDITT RS Roadster (8J)2.5 TFSIvsAUDITTS Roadster (8J)2.0 TFSI
4.7 V8
6.0 i V8
VS
Alfa Romeo8C Spider4.7 V8vsChevroletCorvette Convertible (C6)6.0 i V8
2.5 TFSI
2.0 TFSI
VS
AUDITT RS Roadster (8J)2.5 TFSIvsAUDITTS Roadster (8S)2.0 TFSI
4.7 V8
AMG SL 55 V8
VS
Alfa Romeo8C Spider4.7 V8vsMercedes-BenzSL (R230)Facelift 2006AMG SL 55 V8
2.5 TFSI
2.0 TFSI
VS
AUDITT RS Roadster (8J)2.5 TFSIvsAUDITTS Roadster (8J)Facelift 20102.0 TFSI
4.7 V8
AMG SLK 55 V8
VS
Alfa Romeo8C Spider4.7 V8vsMercedes-BenzSLK (R172)AMG SLK 55 V8
2.5 TFSI
3.2i V6 24V
VS
AUDITT RS Roadster (8J)2.5 TFSIvsAUDITT Roadster (8J)3.2i V6 24V
4.7 V8
AMG SLK 55 V8
VS
Alfa Romeo8C Spider4.7 V8vsMercedes-BenzSLK (R171)Facelift 2008AMG SLK 55 V8
2.5 TFSI
2.5 TFSI
VS
AUDITT RS Roadster (8J)2.5 TFSIvsAUDITT RS Coupe (8J)2.5 TFSI
Alfa Romeo 8C Spider 4.7 V8 vs AUDI TT RS Roadster (8J) 2.5 TFSI - car comparison - FastVsFaster